CN114629491B - Level conversion circuit and power supply device - Google Patents
Level conversion circuit and power supply device Download PDFInfo
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- CN114629491B CN114629491B CN202210190612.6A CN202210190612A CN114629491B CN 114629491 B CN114629491 B CN 114629491B CN 202210190612 A CN202210190612 A CN 202210190612A CN 114629491 B CN114629491 B CN 114629491B
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Abstract
本发明涉及一种电平转换电路及供电装置，通过供电模块提供输入电压，与供电模块连接的转换模块在多个不同电压域转换通路上将输入电压进行转换以输出供电电压信号，与转换模块的受控端连接的控制模块控制转换模块的每个所述电压域转换通路的掉电状态，当掉电状态满足预设状态时生成掉电控制信号，并根据掉电控制信号对对应的电压域转换通路输出的电压转换信号进行锁存处理以使供电电压信号处于正常输出状态，从而提高电平转换电路在外部电源电压掉电场景下进行不同电压域转换时的可靠性。
The present invention relates to a level conversion circuit and a power supply device, wherein an input voltage is provided by a power supply module, a conversion module connected to the power supply module converts the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal, a control module connected to a controlled end of the conversion module controls the power-off state of each of the voltage domain conversion paths of the conversion module, generates a power-off control signal when the power-off state meets a preset state, and latches a voltage conversion signal output by the corresponding voltage domain conversion path according to the power-off control signal so that the power supply voltage signal is in a normal output state, thereby improving the reliability of the level conversion circuit when performing conversions in different voltage domains in a power-off scenario of an external power supply voltage.
Description
Technical Field
The present invention relates to the field of integrated circuits, and in particular, to a level shifter and a power supply device.
Background
With the rapid growth of consumer electronic products, the IC technology enters into a deep submicron age, the electronic integration level is higher and higher, the application environment is more and more complex, the chip often needs multiple voltage domains to supply power, and the level conversion circuit can ensure that data can normally interact in different voltage domains. However, the existing level conversion circuit has poor circuit reliability when different voltage domains are converted under the condition that the external power supply voltage drops.
Disclosure of Invention
In view of the above, it is necessary to provide a level shifter circuit and a power supply device.
In order to achieve the purpose of the invention, the invention adopts the following technical scheme:
a level shifter circuit comprising:
The power supply module is used for providing input voltage;
the conversion module is connected with the power supply module and is used for converting the input voltage on a plurality of different voltage domain conversion channels so as to output a power supply voltage signal;
The control module is connected with the controlled end of the conversion module and is used for monitoring the power-down state of each voltage domain conversion channel of the conversion module, generating a power-down control signal when the power-down state meets a preset state, and carrying out latch processing on the voltage conversion signals output by the corresponding voltage domain conversion channels according to the power-down control signal so as to enable the power supply voltage signals to be in a normal output state.
In one embodiment, the conversion module includes:
the power supply circuit comprises a plurality of conversion units, wherein each conversion unit is arranged on a corresponding voltage domain conversion channel, the input end of the conversion unit of the first stage is used for inputting the voltage, the output end of the conversion unit of the last stage is used for outputting the power supply voltage signal, and the output end of the conversion unit of the previous stage is connected with the input end of the conversion unit of the next stage, wherein:
the control end of each conversion unit is connected with the control module, each conversion unit is used for carrying out corresponding voltage domain conversion processing on an input voltage signal, outputting the voltage signal after the conversion processing to the conversion unit of the next stage, stopping voltage conversion when the power-off control signal is received, and carrying out latch processing on the voltage conversion signal output at the previous time.
In one embodiment, the voltage domains include a first voltage domain, a second voltage domain, a third voltage domain, and a fourth voltage domain, and the conversion unit includes a first conversion unit, a second conversion unit, and a third conversion unit;
The first conversion unit is connected with the power supply module and is used for converting a first voltage signal of the first voltage domain into a second voltage signal of the second voltage domain and outputting the second voltage signal to the second conversion unit;
the second conversion unit is connected with the first conversion unit and is used for converting the second voltage signal into a third voltage signal of the third voltage domain and outputting the third voltage signal to the third conversion unit;
the third conversion unit is connected with the second conversion unit and is used for converting the third voltage signal into a fourth voltage signal of a fourth voltage domain and outputting the power supply voltage signal.
In one embodiment, the control module includes:
The control units are arranged between two adjacent voltage domain switching paths;
each control unit is used for monitoring the power-down state of two adjacent voltage domain switching paths of the switching module, and generating power-down control signals corresponding to the two adjacent voltage domain switching paths when the power-down states of the two adjacent voltage domain switching paths meet the preset power-down state so as to control the corresponding switching units to stop voltage switching and latch the voltage switching signals at the previous moment.
In one embodiment, the control module further comprises:
The voltage division circuit is connected with different voltage domain conversion channels of the conversion module and is used for carrying out voltage division processing on voltage signals in the different voltage domain conversion channels so as to control the power-down state of the different voltage domain conversion channels and outputting a first voltage division signal;
The first adjusting circuit is connected with the voltage dividing circuit and is used for performing voltage adjusting processing on the first voltage dividing signal to generate a first adjusting signal when the first voltage dividing signal meets a preset voltage dividing condition;
The first shaping circuit is connected with the first adjusting circuit and is used for shaping the first adjusting signal to generate a first power-off control signal when the first adjusting signal meets a first preset adjusting condition;
And the first control unit is used for latching the voltage conversion signals output by the voltage domain conversion channels corresponding to the conversion units according to the first power-down control signals.
In one embodiment, the first adjusting circuit includes:
The switching device comprises a first switching tube, a second switching tube, a first inverted ratio tube array and a first trigger, wherein:
The first end of the first switching tube is connected with the voltage dividing circuit, the second end of the first switching tube, the first end of the first trigger and the first end of the first inverted ratio tube array are connected together, the first end of the second switching tube is connected with the second end of the first trigger, the second end of the second switching tube is connected with the second end of the first inverted ratio tube array, and the third end of the second switching tube is connected with the third end of the first inverted ratio tube array.
In one embodiment, the first shaping circuit includes:
The first inverter array comprises a plurality of inverters, a first end of each inverter is connected with a second end of the next inverter, a first end of each inverter is connected with the first adjusting circuit, and a second end of the last inverter is connected with the control module.
In one embodiment, the control module further comprises:
the second regulating circuit is connected with different voltage domain conversion channels of the conversion module and is used for carrying out voltage regulation processing on the voltage signals in the different voltage domain conversion channels so as to generate second regulating signals;
the third adjusting circuit is connected with the second adjusting circuit and is used for carrying out on-off adjustment processing on the second adjusting signal to generate a third adjusting signal when the second adjusting signal meets a second preset adjusting condition;
The second shaping circuit is connected with the third adjusting circuit and is used for shaping the third adjusting signal to generate a second power-off control signal when the third adjusting signal meets a third preset adjusting condition;
And the second control unit is also used for carrying out latch processing on the voltage conversion signals output by the voltage domain conversion channels corresponding to the conversion units according to the second power-down control signals.
In one embodiment, the second adjusting circuit includes:
The third switching tube, the fourth switching tube, the second inverse ratio tube array and the second trigger, wherein:
The third end of the third switching tube, the first end of the fourth switching tube, the second end of the second inverse ratio tube array and the first end of the second trigger are connected together, the second end of the third switching tube is connected with the second end of the fourth switching tube, and the third end of the second trigger is connected with the third end of the fourth switching tube.
In one embodiment, the third adjusting circuit includes:
a fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube and a tenth switching tube, wherein:
The first end of the fifth switching tube is connected with the first end of the sixth switching tube, the third end of the sixth switching tube is connected with the second end of the seventh switching tube, the second end of the eighth switching tube is connected with the third end of the ninth switching tube, the second end of the ninth switching tube is connected with the third end of the tenth switching tube, and the first end of the ninth switching tube is connected with the first end of the tenth switching tube.
In one embodiment, the third adjusting circuit further includes:
An eleventh switching tube, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube, a fifteenth switching tube and a sixteenth switching tube, wherein:
The third end of the eleventh switching tube is connected with the second end of the twelfth switching tube, the second end of the fifteenth switching tube is connected with the third end of the sixteenth switching tube, the third end of the twelfth switching tube, the second end of the thirteenth switching tube and the first end of the sixteenth switching tube are connected together, and the first end of the eleventh switching tube, the second end of the fourteenth switching tube and the third end of the fifteenth switching tube are connected together;
The third end of the fifth switching tube, the second end of the sixth switching tube, the first end of the twelfth switching tube and the first end of the thirteenth switching tube are connected together, and the first end of the seventh switching tube, the second end of the ninth switching tube, the third end of the tenth switching tube, the first end of the fourteenth switching tube and the first end of the fifteenth switching tube are connected together.
In one embodiment, the second shaping circuit includes:
The second inverter array comprises a plurality of inverters, a first end of each inverter is connected with a second end of the next inverter, a first end of each inverter is connected with the third adjusting circuit, and a second end of the last inverter is connected with the control module.
A level shifting power supply apparatus includes the level shifting circuit according to the above.
According to the level conversion circuit, the power supply module is used for providing input voltage, the conversion module connected with the power supply module is used for converting the input voltage on a plurality of different voltage domain conversion channels to output power supply voltage signals, the control module connected with the controlled end of the conversion module is used for controlling the power-down state of each voltage domain conversion channel of the conversion module, when the power-down state meets the preset state, the power-down control signal is generated, and the voltage conversion signals output by the corresponding voltage domain conversion channels are subjected to latch processing according to the power-down control signal so that the power supply voltage signals are in a normal output state, so that the reliability of the level conversion circuit in different voltage domain conversion under the external power supply voltage power-down scene is improved.
Drawings
FIG. 1 is a schematic block diagram of a level shifter circuit in one embodiment;
FIG. 2 is a block diagram of the conversion module in one embodiment;
FIG. 3 is a block diagram of a control module according to one embodiment;
FIG. 4 is a schematic diagram of a first regulation circuit in a control module according to one embodiment;
FIG. 5 is a schematic diagram showing a specific structure of a first array of inverted tubes according to an embodiment;
FIG. 6 is a schematic diagram of a first shaping circuit in a control module according to one embodiment;
FIG. 7 is a schematic diagram of a control module in one embodiment;
FIG. 8 is a schematic diagram of a specific configuration of a second adjusting circuit according to an embodiment;
FIG. 9 is a schematic diagram of a third embodiment of a third adjusting circuit;
Fig. 10 is a schematic diagram of a specific structure of a second shaping circuit in an embodiment.
Detailed Description
In order that the invention may be readily understood, a more complete description of the invention will be rendered by reference to the appended drawings. Preferred embodiments of the present invention are shown in the drawings. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used herein in the description of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.
Referring to fig. 1, a schematic block diagram of a level shifter circuit in one embodiment is shown.
As shown in fig. 1, the level conversion includes a power supply module 100, a conversion module 200, and a control module 300.
The power supply module 100 is used for providing an input voltage.
The conversion module 200 is connected to the power supply module 100, and is configured to convert an input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal.
The control module 300 is connected to the controlled end of the conversion module 200, and is configured to control the power-down state of each voltage domain conversion path of the conversion module 200, generate a power-down control signal when the power-down state meets a preset state, and latch the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-down control signal so that the power supply voltage signal is in a normal output state.
The power supply module 100 provides an input voltage and transmits the input voltage to the conversion module 200, the conversion module 200 converts the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal, the control module 300 monitors a power-down state of each voltage domain conversion path of the conversion module 200, generates a power-down control signal when the power-down state meets a preset state, and latches the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-down control signal to enable the power supply voltage signal to be in a normal output state.
Alternatively, the method of connecting the control module 300 to the controlled end of the conversion module 200 may be to construct a connection path between the control module 300 and the conversion module by adding an additional switching tube or a transmission gate.
In the level conversion circuit in this embodiment, the power supply module 100 provides an input voltage, the conversion module 200 connected to the power supply module 100 converts the input voltage on a plurality of different voltage domain conversion paths to output a power supply voltage signal, the control module 300 connected to the controlled end of the conversion module 200 controls the power-down state of each voltage domain conversion path of the conversion module, generates a power-down control signal when the power-down state meets a preset state, and latches the voltage conversion signal output by the corresponding voltage domain conversion path according to the power-down control signal to enable the power supply voltage signal to be in a normal output state, so that the reliability of the level conversion circuit when performing different voltage domain conversions under the external power supply voltage power-down field is improved.
In one embodiment, the conversion module includes a plurality of conversion units, wherein an input terminal of a conversion unit of a first stage is used for inputting a voltage, an output terminal of a conversion unit of a last stage is used for outputting a supply voltage signal, and an output terminal of a conversion unit of a previous stage is connected with an input terminal of a conversion unit of an adjacent subsequent stage.
The control end of each conversion unit is connected with the control module, and each conversion unit is used for carrying out corresponding voltage domain conversion processing on an input voltage signal and outputting the voltage signal after the conversion processing to a conversion unit of a later stage, and can also be used for stopping voltage conversion and carrying out latch processing on the voltage conversion signal output at the previous moment when receiving a power-off control signal.
Optionally, the conversion module includes a first conversion unit, i.e. a conversion unit of level 1, a second conversion unit, i.e. a conversion unit of level 2, and a third conversion unit, i.e. a conversion unit of level 3. The three conversion units are sequentially connected, the input end of the conversion unit of the 1 st stage is used for being connected with input voltage provided by an external power supply, the output end of the conversion unit of the 3 rd stage is used for outputting a power supply voltage signal, the output end of the conversion unit of the 1 st stage is connected with the input end of the conversion unit of the adjacent 2 nd stage, and the output end of the conversion unit of the 2 nd stage is connected with the input end of the conversion unit of the adjacent 3 rd stage.
Referring to fig. 2, a schematic block diagram of a conversion module in one embodiment is shown.
As shown in fig. 2, in the present embodiment, the voltage domains include a first voltage domain, a second voltage domain, a third voltage domain, and a fourth voltage domain, and the conversion units of the conversion module specifically include a first conversion unit 210, a second conversion unit 220, and a third conversion unit 230.
The first conversion unit 210 is connected to the power supply module, and is configured to convert a first voltage signal of the first voltage domain into a second voltage signal of the first voltage domain, and output the second voltage signal to an input terminal of the second conversion unit 220.
The second converting unit 220 is connected to the first converting unit 210, and is configured to convert the second voltage signal into a third voltage signal in a third voltage domain, and output the third voltage signal to an input terminal of the third converting unit 230.
The third converting unit 230 is connected to the second converting unit 220, and is configured to convert the third voltage signal into a fourth voltage signal of a fourth voltage domain and output a power supply voltage signal.
Alternatively, the first voltage domain may be a 1.5V to 0V voltage domain, the second voltage domain may be a 5.6V to 0V voltage domain, the third voltage domain may be a 5.6V to-12V voltage domain, the fourth voltage domain may be a 12V to-12V voltage domain, the first conversion unit 210 may convert the voltage signal from the 1.5V to 0V voltage domain to the 5.6V to 0V voltage domain during the level conversion, the second conversion unit 220 may convert the voltage signal from the 5.6V to 0V voltage domain to the 5.6V to-12V voltage domain, and the third conversion unit may convert the voltage signal from the 5.6V to-12V voltage domain to the 12V to-12V voltage domain.
In one embodiment, the control module includes a plurality of control units, each of which is disposed between two adjacent voltage domain switching paths. Each control unit is used for detecting the power-down state of two adjacent voltage domain conversion channels of the conversion module, and generating power-down control signals corresponding to the two adjacent voltage domain conversion channels when the power-down state of the two adjacent voltage domain conversion channels meets the preset power-down state so as to control the corresponding conversion units to stop voltage conversion and latch the voltage conversion signals output at the previous moment.
Alternatively, the power-down state of two adjacent voltage domain switching paths satisfies the preset power-down state, which may be that a sudden power-down phenomenon occurs between two adjacent voltage domain switching paths, that is, no voltage signal exists between two adjacent voltage domain switching paths, or the magnitude of the voltage signal between two adjacent voltage domain switching paths suddenly drops by more than 50%.
For example, in the voltage conversion process that the second conversion unit converts the second voltage signal of the second voltage domain into the third voltage signal of the third voltage domain, if the conversion path between the second voltage domain and the third voltage domain suddenly fails, a power failure control signal corresponding to the conversion path between the second voltage domain and the third voltage domain is generated, the power failure control signal is input to the second conversion unit, the second conversion unit is controlled to stop the voltage conversion and latch the voltage conversion signal output at the previous time, so that the state before the power failure is maintained, and when the conversion path between the second voltage domain and the third voltage domain is recovered, the second conversion unit continues the voltage conversion, thereby improving the reliability and the accuracy of the level conversion.
Referring to FIG. 3, a block diagram is shown illustrating a control module in one embodiment.
As shown in fig. 3, the control module in the present embodiment includes a voltage dividing circuit 310, a first adjusting circuit 320, and a first shaping circuit 330.
The voltage dividing circuit 310 is connected to different voltage domain switching paths of the switching module, and is configured to perform voltage dividing processing on the voltage signals in the different voltage domain switching paths to detect a power failure state of the different voltage domain switching paths, and output a first voltage dividing signal.
The first adjusting circuit 320 is connected to the voltage dividing circuit 310, and is configured to perform voltage adjustment processing on the first divided signal to generate a first adjusting signal when the first divided signal meets a preset voltage dividing condition.
The first shaping circuit 330 is connected to the first adjusting circuit 320, and is configured to perform shaping processing on the first adjusting signal to generate a first power-off control signal when the first adjusting signal meets a first preset adjusting condition.
For example, in a voltage conversion process of converting a first voltage signal of a first voltage domain into a second voltage signal of a second voltage domain by the first conversion unit, assuming that a conversion path between the first voltage domain and the second voltage domain suddenly fails, the voltage dividing circuit 310 connected to a different voltage domain conversion path of the conversion module performs voltage dividing processing on the voltage signal in the different voltage domain conversion path at this time to detect a power failure state of the different voltage domain conversion path, and outputs a first divided signal, the first adjusting circuit 320 connected to the voltage dividing circuit 310 performs voltage adjusting processing on the first divided signal to generate a first adjusting signal when the first divided signal satisfies a preset divided condition, and the first shaping circuit 330 connected to the first adjusting circuit 320 performs shaping processing on the first adjusting signal to generate a first power failure control signal when the first adjusting signal satisfies the first preset adjusted condition, and the first control unit performs latching processing on the voltage conversion signal output by the conversion path between the first voltage domain and the second voltage domain adjacent to the first conversion unit according to the first power failure control signal.
Referring to fig. 4, a schematic diagram of a first adjusting circuit in a control module according to an embodiment is shown.
As shown in fig. 4, the first adjusting circuit in the present embodiment includes a first switching tube Q1, a second switching tube Q2, a first inverse ratio tube array Bm, and a first trigger T1. The first end of the first switching tube Q1 is connected with the voltage dividing circuit, the second end of the first switching tube Q1, the first end of the first trigger T1 and the first end of the first inverse ratio tube array Bm are commonly connected, the second end of the second switching tube Q2 is connected with the second end of the first inverse ratio tube array Bm, and the third end of the second switching tube Q2 is connected with the third end of the first inverse ratio tube array Bm.
Alternatively, the first inverse ratio tube array Bm may be formed by connecting a plurality of inverse ratio tubes in series. The third end of the first inverted ratio tube is connected with the first switch tube, the second end of the last inverted ratio tube is connected with the second switch tube, the first end of each inverted ratio tube is connected together, the second end of each inverted ratio tube is connected with the third end of one inverted ratio tube in two adjacent inverted ratio tubes, and the third end of each inverted ratio tube is connected with the second end of the other inverted ratio tube in two adjacent inverted ratio tubes.
Referring to fig. 5, a schematic diagram of a specific structure of a first inverted tube array according to an embodiment is shown.
As shown in fig. 5, the first array of the inverted pipes in this embodiment includes a first inverted pipe B1, a second inverted pipe B2, a third inverted pipe B3, and a fourth inverted pipe B4. The first end of the first inverse ratio pipe B1, the first end of the second inverse ratio pipe B2, the first end of the third inverse ratio pipe B3 and the first end of the fourth inverse ratio pipe B4 are connected together, the second end of the first inverse ratio pipe B1 is connected with the third end of the second inverse ratio pipe B2, the third end of the second inverse ratio pipe B2 is connected with the second end of the third inverse ratio pipe B3, and the third end of the third inverse ratio pipe B3 is connected with the second end of the fourth inverse ratio pipe B4.
Referring to fig. 6, a schematic diagram of a first shaping circuit in a control module according to an embodiment is shown.
As shown in fig. 6, the first shaping circuit in the present embodiment includes a first inverter array Fm that includes a plurality of inverters, that is, f1 to Fm in total, m inverters, optionally m is not less than 2. The first end of each inverter is connected with the second end of the next inverter, the first end of the first inverter is connected with the first regulating circuit, and the second end of the last inverter is connected with the control module.
Referring to fig. 7, a schematic structural diagram of a control module in one embodiment is shown.
As shown in fig. 7, the control module in this embodiment includes a second adjusting circuit 710, a third adjusting circuit 720, and a second shaping circuit 730.
The second adjusting circuit 710 is connected to the different voltage domain switching paths of the switching module, and is configured to perform voltage adjustment processing on the voltage signals in the different voltage domain switching paths to generate a second adjusting signal.
And the third adjusting circuit 720 is connected to the second adjusting circuit 710, and is configured to perform on-off adjustment processing on the second adjusting signal to generate a third adjusting signal when the second adjusting signal meets a second preset adjusting condition.
The second shaping circuit 730 is connected to the third adjusting circuit 720, and is configured to perform shaping processing on the third adjusting signal to generate a second power-off control signal when the third adjusting signal meets a third preset adjusting condition.
Alternatively, the voltage adjustment process may be a voltage amplitude raising process, or a high-low voltage inversion of the input signal, such as when the input voltage is higher than a positive threshold voltage, the output is high, when the input voltage is lower than a negative threshold voltage, the output is low, and when the input is between the positive and negative threshold voltages, the output is unchanged, that is, the output is inverted from a high level to a low level, or the corresponding threshold voltages are different when the output is inverted from a low level to a high level. The on-off adjustment processing can be to switch and adjust the on-off direction of the input signal. The shaping process may be a 180 degree inversion of the phase of the input signal.
Optionally, the second preset adjustment condition may be that the input voltage amplitude is greater than the on voltage drop of the switching tube, or that the input voltage is higher than the positive threshold voltage of the trigger, or that the input voltage is lower than the negative threshold voltage of the trigger, or the like.
Optionally, the third preset adjustment condition may be that the input voltage amplitude is greater than the on-voltage drop of the switching tube.
For example, in the voltage conversion process of the third conversion unit converting the third voltage signal of the third voltage domain into the fourth voltage signal of the fourth voltage domain, assuming that the conversion path between the third voltage domain and the fourth voltage domain suddenly fails, the second adjustment circuit 710 connected to the different voltage domain conversion path of the conversion module performs voltage adjustment processing on the voltage signals in the different voltage domain conversion paths to generate a second adjustment signal, the third adjustment circuit 720 connected to the second adjustment circuit 710 receives the second adjustment voltage, performs on-off adjustment processing on the second adjustment signal to generate a third adjustment signal when the second adjustment voltage amplitude is greater than the switching tube on voltage drop and the input voltage is higher than the forward threshold voltage of the trigger, the second shaping circuit 730 connected to the third adjustment circuit 720 receives the third adjustment signal, and performs phase inversion 180 degrees on the input third adjustment signal to generate a second power failure control signal when the third adjustment signal satisfies the switching tube on voltage drop in the circuit, and the second control unit latches the output signal between the voltage domain adjacent to the third conversion circuit of the third conversion unit according to the second power failure control signal.
Referring to fig. 8, a schematic diagram of a specific structure of a second adjusting circuit in one embodiment is shown.
As shown in fig. 8, the second adjusting circuit in this embodiment includes a third switching tube Q3, a fourth switching tube Q4, a second inverse ratio tube array Bn, and a second trigger T2. The third end of the third switching tube Q3, the first end of the fourth switching tube Q4, the second end of the second inverse ratio tube array Bn, and the first end of the second trigger T2 are commonly connected, the second end of the third switching tube Q3 is connected with the second end of the fourth switching tube Q4, and the third end of the second trigger T2 is connected with the third end of the fourth switching tube Q4.
Optionally, the first end of the third switching tube Q3 and the first end of the fourth switching tube Q4 may be gates of MOS tubes, the second end of the third switching tube Q3 and the second end of the fourth switching tube Q4 may be sources of MOS tubes, and the third end of the third switching tube Q3 and the third end of the fourth switching tube Q4 may be drains of MOS tubes.
Referring to fig. 9, a schematic diagram of a specific structure of a third adjusting circuit in one embodiment is shown.
As shown in fig. 9, the third adjusting circuit in the present embodiment includes a fifth switching tube Q5, a sixth switching tube Q6, a seventh switching tube Q7, an eighth switching tube Q8, a ninth switching tube Q9, and a tenth switching tube Q10. The first end of the fifth switching tube Q5 is connected to the first end of the sixth switching tube Q6, the third end of the sixth switching tube Q6 is connected to the second end of the seventh switching tube Q7, the second end of the eighth switching tube Q8 is connected to the third end of the ninth switching tube Q9, the second end of the ninth switching tube Q9 is connected to the third end of the tenth switching tube Q10, and the first end of the ninth switching tube Q9 is connected to the first end of the tenth switching tube Q10.
With continued reference to fig. 9, a schematic diagram of a specific structure of a third adjusting circuit in one embodiment is shown.
As shown in fig. 9, the third adjusting circuit in the present embodiment includes an eleventh switching tube Q11, a twelfth switching tube Q12, a thirteenth switching tube Q13, a fourteenth switching tube Q14, a fifteenth switching tube Q15, and a sixteenth switching tube Q16. The third end of the eleventh switching tube Q11 is connected to the second end of the twelfth switching tube Q12, the second end of the fifteenth switching tube Q15 is connected to the third end of the sixteenth switching tube Q16, the third end of the twelfth switching tube Q12, the second end of the thirteenth switching tube Q13, and the first end of the sixteenth switching tube Q16 are commonly connected, and the first end of the eleventh switching tube Q11, the second end of the fourteenth switching tube Q14, and the third end of the fifteenth switching tube Q15 are commonly connected.
The third terminal of the fifth switching transistor Q5, the second terminal of the sixth switching transistor Q6, the first terminal of the twelfth switching transistor Q12, and the first terminal of the thirteenth switching transistor Q13 are commonly connected, and the first terminal of the seventh switching transistor Q7, the second terminal of the ninth switching transistor Q9, the third terminal of the tenth switching transistor Q10, the first terminal of the fourteenth switching transistor Q14, and the first terminal of the fifteenth switching transistor Q15 are commonly connected.
Referring to fig. 10, a schematic diagram of a specific structure of a second shaping circuit in one embodiment is shown.
As shown in fig. 10, the second shaping circuit includes a second inverter array Fn including a plurality of inverters, that is, f1 to Fn total n inverters, optionally n is not less than 2 in the present embodiment. The first end of each inverter is connected with the second end of the next inverter, the first end of the first inverter is connected with the third regulating circuit, and the second end of the last inverter is connected with the control module.
In one embodiment, a level shifting power supply apparatus includes a level shifting circuit according to the above embodiment.
Optionally, the switching tube in the above embodiment includes a MOS tube, a first end of the switching tube may be a gate of the MOS tube, a second end of the switching tube may be a source of the MOS tube, and a third end of the switching tube may be a drain of the MOS tube.
Alternatively, the first end of the inverter in the above embodiment may be a signal input end of the inverter, and the second end of the inverter may be a signal output end of the inverter.
Optionally, the flip-flop in the above embodiment includes a schmitt trigger, the first end of the flip-flop may be a signal input end of the flip-flop, and the second end of the flip-flop may be a signal output end of the flip-flop.
The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.
Claims (10)
1. A level shifter circuit, comprising:
The power supply module is used for providing input voltage;
The conversion module comprises a plurality of conversion units, each conversion unit is arranged on a corresponding voltage domain conversion channel, the input end of the conversion unit of the first stage is used for inputting the input voltage, the output end of the conversion unit of the last stage is used for outputting a power supply voltage signal, and the output end of the conversion unit of the previous stage is connected with the input end of the conversion unit of the next stage;
The control module is connected with the controlled end of the conversion module and is used for monitoring the power-down state of each voltage domain conversion channel of the conversion module, generating a power-down control signal when the power-down state meets a preset state, and carrying out latch processing on the voltage conversion signals output by the corresponding voltage domain conversion channels according to the power-down control signal so as to enable the power supply voltage signals to be in a normal output state;
The control end of each conversion unit is connected with the control module, and each conversion unit is used for carrying out corresponding voltage domain conversion processing on an input voltage signal and outputting the voltage signal after the conversion processing to the conversion unit of the next stage;
The control module comprises a plurality of control units, wherein each control unit is arranged between two adjacent voltage domain switching paths, each control unit is used for monitoring the power-down states of the two adjacent voltage domain switching paths of the switching module, and generating power-down control signals corresponding to the two adjacent voltage domain switching paths when the power-down states of the two adjacent voltage domain switching paths meet the preset power-down states so as to control the corresponding switching units to stop voltage switching and latch the voltage switching signals at the previous moment;
The control module further comprises a voltage dividing circuit, a first adjusting circuit, a first shaping circuit and a first control unit, wherein the voltage dividing circuit is connected with different voltage domain switching paths of the switching module and is used for carrying out voltage dividing processing on the power supply voltage signals in the different voltage domain switching paths to control the power-down state of the different voltage domain switching paths and output a first voltage dividing signal, the first adjusting circuit is connected with the voltage dividing circuit and is used for carrying out voltage adjusting processing on the first voltage dividing signal to generate a first adjusting signal when the first voltage dividing signal meets a preset voltage dividing condition, the first shaping circuit is connected with the first adjusting circuit and is used for carrying out shaping processing on the first adjusting signal to generate a first power-down control signal when the first adjusting signal meets the first preset adjusting condition, and the first control unit is used for carrying out processing on the voltage switching signal output by the corresponding voltage domain switching path of the switching unit according to the first power-down control signal.
2. The level shift circuit of claim 1, wherein the voltage domain comprises a first voltage domain, a second voltage domain, a third voltage domain, a fourth voltage domain, and the shift unit comprises a first shift unit, a second shift unit, and a third shift unit;
The first conversion unit is connected with the power supply module and is used for converting a first voltage signal of the first voltage domain into a second voltage signal of the second voltage domain and outputting the second voltage signal to the second conversion unit;
the second conversion unit is connected with the first conversion unit and is used for converting the second voltage signal into a third voltage signal of the third voltage domain and outputting the third voltage signal to the third conversion unit;
the third conversion unit is connected with the second conversion unit and is used for converting the third voltage signal into a fourth voltage signal of a fourth voltage domain and outputting the power supply voltage signal.
3. The level shifter circuit of claim 1, wherein the first regulator circuit comprises:
The switching device comprises a first switching tube, a second switching tube, a first inverted ratio tube array and a first trigger, wherein:
The first end of the first switching tube is connected with the voltage dividing circuit, the second end of the first switching tube, the first end of the first trigger and the first end of the first inverted ratio tube array are connected together, the first end of the second switching tube is connected with the second end of the first trigger, the second end of the second switching tube is connected with the second end of the first inverted ratio tube array, and the third end of the second switching tube is connected with the third end of the first inverted ratio tube array.
4. The level shifter circuit of claim 1, wherein the first shaping circuit comprises:
The first inverter array comprises a plurality of inverters, a first end of each inverter is connected with a second end of the next inverter, a first end of each inverter is connected with the first adjusting circuit, and a second end of the last inverter is connected with the control module.
5. The level shifter circuit of claim 1, wherein the control module further comprises:
the second regulating circuit is connected with different voltage domain conversion channels of the conversion module and is used for carrying out voltage regulation processing on the voltage signals in the different voltage domain conversion channels so as to generate second regulating signals;
the third adjusting circuit is connected with the second adjusting circuit and is used for carrying out on-off adjustment processing on the second adjusting signal to generate a third adjusting signal when the second adjusting signal meets a second preset adjusting condition;
The second shaping circuit is connected with the third adjusting circuit and is used for shaping the third adjusting signal to generate a second power-off control signal when the third adjusting signal meets a third preset adjusting condition;
And the second control unit is also used for carrying out latch processing on the voltage conversion signals output by the voltage domain conversion channels corresponding to the conversion units according to the second power-down control signals.
6. The level shifter circuit of claim 5, wherein the second regulator circuit comprises:
The third switching tube, the fourth switching tube, the second inverse ratio tube array and the second trigger, wherein:
The third end of the third switching tube, the first end of the fourth switching tube, the second end of the second inverse ratio tube array and the first end of the second trigger are connected together, the second end of the third switching tube is connected with the second end of the fourth switching tube, and the third end of the second trigger is connected with the third end of the fourth switching tube.
7. The level shifter circuit of claim 5, wherein the third adjuster circuit comprises:
A fifth switching tube, a sixth switching tube, a seventh switching tube, an eighth switching tube, a ninth switching tube and a tenth switching tube, wherein:
The first end of the fifth switching tube is connected with the first end of the sixth switching tube, the third end of the sixth switching tube is connected with the second end of the seventh switching tube, the second end of the eighth switching tube is connected with the third end of the ninth switching tube, the second end of the ninth switching tube is connected with the third end of the tenth switching tube, and the first end of the ninth switching tube is connected with the first end of the tenth switching tube.
8. The level shifter circuit of claim 7, wherein the third regulator circuit further comprises:
An eleventh switching tube, a twelfth switching tube, a thirteenth switching tube, a fourteenth switching tube, a fifteenth switching tube and a sixteenth switching tube, wherein:
The third end of the eleventh switching tube is connected with the second end of the twelfth switching tube, the second end of the fifteenth switching tube is connected with the third end of the sixteenth switching tube, the third end of the twelfth switching tube, the second end of the thirteenth switching tube and the first end of the sixteenth switching tube are connected together, and the first end of the eleventh switching tube, the second end of the fourteenth switching tube and the third end of the fifteenth switching tube are connected together;
The third end of the fifth switching tube, the second end of the sixth switching tube, the first end of the twelfth switching tube and the first end of the thirteenth switching tube are connected together, and the first end of the seventh switching tube, the second end of the ninth switching tube, the third end of the tenth switching tube, the first end of the fourteenth switching tube and the first end of the fifteenth switching tube are connected together.
9. The level shifter circuit of claim 5, wherein the second shaper circuit comprises:
The second inverter array comprises a plurality of inverters, a first end of each inverter is connected with a second end of the next inverter, a first end of each inverter is connected with the third adjusting circuit, and a second end of the last inverter is connected with the control module.
10. A level-shifting power supply apparatus comprising a level-shifting circuit according to any one of claims 1-9.
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