CN104901266B - Fuse trims circuit - Google Patents
Fuse trims circuit Download PDFInfo
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- CN104901266B CN104901266B CN201510226375.4A CN201510226375A CN104901266B CN 104901266 B CN104901266 B CN 104901266B CN 201510226375 A CN201510226375 A CN 201510226375A CN 104901266 B CN104901266 B CN 104901266B
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- 230000007274 generation of a signal involved in cell-cell signaling Effects 0.000 claims description 6
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- 241000208340 Araliaceae Species 0.000 claims 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 claims 1
- 235000003140 Panax quinquefolius Nutrition 0.000 claims 1
- 235000008434 ginseng Nutrition 0.000 claims 1
- 238000012360 testing method Methods 0.000 abstract description 5
- 239000004065 semiconductor Substances 0.000 description 6
- 238000000034 method Methods 0.000 description 3
- 238000009966 trimming Methods 0.000 description 3
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 2
- 229910052782 aluminium Inorganic materials 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 238000012544 monitoring process Methods 0.000 description 2
- 238000013102 re-test Methods 0.000 description 2
- 238000007664 blowing Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
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Abstract
The present invention relates to technical field of electronic device test, the present invention provides a kind of fuse and trims circuit, including first switch device, voltage comparator circuit and ON-OFF control circuit；ON-OFF control circuit controls first switch break-over of device according to initial enable signal, so that first switch device exports the first predeterminated voltage to fuse, the voltage and reference voltage output that voltage comparator circuit exports during fuse calcination according to fuse turn on enable signal, and ON-OFF control circuit is in the conduction state according to conducting enable signal control first switch device；When blown fuse; ON-OFF control circuit control first switch device shut-off; by setting switching device and ON-OFF control circuit; when blown fuse disconnects; ON-OFF control circuit controlling switch device disconnects; using self-locking and self-protection circuit, whole circuit is automatically powered off, prevent predeterminated voltage to be applied on internal circuit so as to cause the risk that internal circuit damages.
Description
Technical field
The present invention relates to technical field of electronic device test, more particularly to a kind of fuse to trim circuit.
Background technology
It is a testing procedure very common in wafer sort to trim, according to its process conditions, it is common can be divided into it is sharp
Light is trimmed, aluminum strip is trimmed and trimmed with poly, and laser trimming is currently not main flow, and current main trimmed using aluminum strip is repaiied with poly
Adjust, by using the mode for applying voltage or electric current, blown using heat energy；At present in test platform, as shown in figure 1,
Fuse is directly connected on power end, wherein first resistor R1 and 3rd resistor R3 are contact resistance, and voltage source VIN applies voltage
Or electric current, the heat energy for flowing through fuse is reached its fusing point or breakdown point and is disconnected fuse.Because each fuse connects
Get an electric shock and hinder, the resistance of contact resistance every time can be different and has the possibility of increase；First resistor R1 and 3rd resistor R3 have
Change and the possibility of increase, for the stability of production, voltage source VIN input voltage can be increased, to reduce contact impedance pair
Trim the influence of effect；But this method can not estimate blowing the time for each fuse, and can not voluntarily off voltage source
Input, can only be to fuse each application set time, when fuse disconnects, then voltage source will be continuously applied electric internally
Lu Zhong, certain risk be present to internal circuit damage.In summary, existing in the prior art can not be certainly when blown fuse
Row, which disconnects, applies the problem of voltage source causes to damage internal circuit.
The content of the invention
It is an object of the invention to provide a kind of fuse to trim circuit, it is intended to solves for presence in the prior art as guarantor
The problem of applied voltage source causes to damage internal circuit can not be voluntarily disconnected during dangerous silk fusing.
The present invention is achieved in that first aspect provides a kind of fuse and trims circuit, and the fuse trims circuit
Including first switch device, voltage comparator circuit and ON-OFF control circuit；
The input of the first switch device accesses the first predeterminated voltage, the output end connection of the first switch device
The input of fuse circuit, the output end of the fuse circuit connect the first voltage input of the voltage comparator circuit
End, the second voltage input access reference voltage of the voltage comparator circuit, the output end connection of the voltage comparator circuit
The first input end of the ON-OFF control circuit, the second input of the ON-OFF control circuit access initial enable signal, institute
The output end for stating ON-OFF control circuit connects the control terminal of the first switch device；
The ON-OFF control circuit controls the first switch break-over of device according to the initial enable signal, so that described
First switch device exports first predeterminated voltage to the fuse in the fuse circuit；The voltage comparator circuit
According to the voltage of the fuse circuit output end and reference voltage generation conducting during the fuse calcination
Enable signal；The ON-OFF control circuit controls the first switch device to be on shape according to the conducting enable signal
State；
When the blown fuse, voltage and institute of the voltage comparator circuit according to the fuse circuit output end
State reference voltage generation shut-off enable signal；The ON-OFF control circuit is opened according to the shut-off enable signal control described first
Close device shut-off.
With reference in a first aspect, in the first embodiment of first aspect, the ON-OFF control circuit includes the 5th electricity
Resistance, first comparator, switching tube and the 6th resistance；
The first end of 5th resistance is the input of the ON-OFF control circuit, and the second end of the 5th resistance connects
The in-phase input end of the first comparator is connect, the inverting input of the first comparator connects the reference voltage, described
The output end of first comparator connects the control terminal of the switching tube, and the input of the switching tube is connected to ground, the switch
The first end of output end connection the 6th resistance of pipe, the second termination voltage source of the 6th resistance, the switching tube
Output end is the output end of the ON-OFF control circuit.
With reference to the first embodiment of first aspect, in second of embodiment of first aspect, the switching tube
For FET, triode or IGBT.
With reference to second of embodiment of first aspect, in the third embodiment of first aspect, the switching tube
For FET, grid, drain electrode and the source electrode of the FET be respectively the control terminal of the switching tube, output end and
Input.
With reference in a first aspect, in the third embodiment of first aspect, the voltage comparator circuit includes the second ratio
Compared with device, first resistor and second resistance；
The first end of the first resistor is the first voltage input of the voltage comparator circuit, the first resistor
The first end of the second end connection second resistance and the in-phase input end of second comparator, the second of the second resistance
End ground connection, the inverting input of second comparator are the second voltage input of the voltage comparator circuit, described second
The output end of comparator is the output end of the voltage comparator circuit.
With reference in a first aspect, in the 4th kind of embodiment of first aspect, the fuse, which trims circuit, also to be included just
Beginning enable signal generation circuit, the initial enable signal generation circuit include second switch device and the 4th resistance；
The first end of 4th resistance accesses the second predeterminated voltage, the second end connection described second of the 4th resistance
The input of switching device, the output end of the second switch device connect the second input of the ON-OFF control circuit, institute
State the control terminal access external control signal of second switch device；
The second switch device is turned on to the initial enabled letter of ON-OFF control circuit output according to external control signal
Number, when the first switch device is in the conduction state, turned off according to external control signal.
With reference in a first aspect, in the 5th kind of embodiment of first aspect, the fuse circuit be it is multiple, it is described more
Individual fuse is connected in parallel.
With reference to the 5th kind of embodiment of first aspect, in the 6th kind of embodiment of first aspect, the fuse
Circuit includes relay, current-limiting resistance and fuse；
The input of the relay is the input of the fuse circuit, and the output end of the relay connects current limliting
The first end of resistance, the second end of the current-limiting resistance connect the first end of the fuse, and the second end of the fuse is
The output end of the fuse circuit.
A kind of fuse of the present invention trims circuit, by setting switching device and ON-OFF control circuit, in blown fuse
During disconnection, ON-OFF control circuit controlling switch device disconnects, and using self-locking and self-protection circuit, automatically powers off whole circuit,
Prevent predeterminated voltage to be applied to so as to cause the risk that internal circuit damages on internal circuit, and pass through some in observation circuit
The state of point, you can judge whether the fuse disconnects, it is not necessary to judged in retest, save the testing time.
Brief description of the drawings
Technical scheme in order to illustrate the embodiments of the present invention more clearly, below will be to embodiment or description of the prior art
In the required accompanying drawing used be briefly described, it should be apparent that, drawings in the following description be only the present invention some
Embodiment, for those of ordinary skill in the art, without having to pay creative labor, can also be according to these
Accompanying drawing obtains other accompanying drawings.
Fig. 1 is the circuit diagram that the fuse that prior art provides trims circuit；
Fig. 2 is the structural representation that a kind of fuse provided in an embodiment of the present invention trims circuit；
Fig. 3 is the circuit diagram that a kind of fuse provided in an embodiment of the present invention trims circuit.
Embodiment
In order to make the purpose , technical scheme and advantage of the present invention be clearer, it is right below in conjunction with drawings and Examples
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
In order to illustrate technical scheme, illustrated below by specific embodiment.
An embodiment of the present invention provides a kind of fuse 102 and trims circuit, as shown in Fig. 2 fuse 102 trims circuit
Including first switch device 101, voltage comparator circuit 103 and ON-OFF control circuit 104.
The input of first switch device 101 accesses the first predeterminated voltage, and the output end connection of first switch device 101 is protected
The input of dangerous silk circuit 102, the first voltage input of the output end connection voltage comparator circuit 103 of the circuit of fuse 102,
The second voltage input access reference voltage of voltage comparator circuit 103, the output end connecting valve control of voltage comparator circuit 103
The first input end of circuit 104 processed, the second input of ON-OFF control circuit 104 access initial enable signal, switch control electricity
The control terminal of the output end connection first switch device 101 on road 104.
ON-OFF control circuit 104 controls first switch device 101 to turn on according to initial enable signal, so that first switch device
Part 101 exports the first predeterminated voltage to the fuse in fuse circuit 102, and voltage comparator circuit 103 is in fuse calcination
During according to the voltage and reference voltage output of the output end of fuse circuit 102 turn on enable signal, ON-OFF control circuit
104 is in the conduction state according to conducting enable signal control first switch device 101.
When fuse 102 fuses, voltage and reference of the voltage comparator circuit 103 according to the output end of fuse circuit 102
Voltage output turns off enable signal, and ON-OFF control circuit 104 turns off according to shut-off enable signal control first switch device 101.
It should be noted that the first predeterminated voltage can be supply voltage, or after handling supply voltage
Obtained voltage, for example, supply voltage is 10V, the 8V electricity required for supply voltage is obtained after the components such as diode
Pressure.
The embodiment of the present invention is by setting switching device and ON-OFF control circuit, when blown fuse disconnects, switch control
Circuit controling switch device processed disconnects, and using self-locking and self-protection circuit, automatically powers off whole circuit, prevents predeterminated voltage from applying
It is added on internal circuit so as to cause the risk that internal circuit damages, and the state put by some in observation circuit, you can
Judge whether the fuse disconnects, it is not necessary to judged in retest, save the testing time.
For first switch device 101, specifically, first switch device 101 can be relay.
For ON-OFF control circuit 104, specifically, as shown in figure 3, ON-OFF control circuit 104 includes the 5th resistance R5, the
One comparator U1, the resistance R6 of switching tube 105 and the 6th.
5th resistance R5 first end is the input of ON-OFF control circuit 104, the 5th resistance R5 the second end connection the
One comparator U1 in-phase input end, first comparator U1 inverting input connection reference voltage, first comparator U1's is defeated
Go out to hold the control terminal of connecting valve pipe 105, the input of switching tube 105 is connected to ground, the output end connection the 6th of switching tube 105
Resistance R6 first end, the 6th resistance R6 the second termination voltage source, the output end of switching tube 105 is ON-OFF control circuit 104
Output end.
Further, switching tube 105 is FET, triode or IGBT.
Preferably, switching tube 105 is FET, and grid, drain electrode and the source electrode of FET are respectively switching tube 105
Control terminal, output end and input.
For voltage comparator circuit 103, specifically, voltage comparator circuit 103 includes the second comparator U2, first resistor R1
With second resistance R2；
First resistor R1 first end be voltage comparator circuit 103 first voltage input, the second of first resistor R1
End connection second resistance R2 first end and the second comparator U2 in-phase input end, second resistance R2 the second end ground connection, the
Two comparator U2 inverting input be voltage comparator circuit 103 second voltage input, the second comparator U2 output end
For the output end of voltage comparator circuit 103.
It should be noted that fuse circuit 102 and first resistor R1, the second resistance R2 in voltage comparator circuit 103
And earth terminal forms loop.
Further, fuse, which trims circuit, also includes initial enable signal generation circuit 106, and initial enable signal produces
Circuit 106 includes second switch device K2 and the 4th resistance R4.
4th resistance R4 first end accesses the second predeterminated voltage, the 4th resistance R4 the second end connection second switch device
K2 input, the second input of second switch device K2 output end connecting valve control circuit 104, second switch device
K2 control terminal access external control signal.
Second switch device K2 is turned on to ON-OFF control circuit 104 according to external control signal and is exported initial enable signal,
When first switch device 101 is in the conduction state, turned off according to external control signal.
The effect of initial enable signal generation circuit 106 is exactly to produce an initial enable signal according to external control signal
Whole circuit is started working, after whole circuit works, stop exporting initial enable signal by external control signal, it is outside
Control signal can be that manual control is sent.
Further, fuse circuit 102 is multiple that multiple fuse circuits 102 are connected in parallel.
Specifically, this circuit can be not only used for that a fuse is carried out trimming monitoring, can also monitor simultaneously multiple
Fuse.
Further, fuse circuit 102 includes relay K3, current-limiting resistance R3 and fuse F；
Relay K3 input is the input of fuse circuit 102, and relay K3 output end connects current-limiting resistance
R3 first end, current-limiting resistance R3 the second end connection fuse F first end, fuse F the second end is fuse circuit
102 output end.For relay K3, can be controlled by inputting external control signal to control terminal C.
The operation principle of the embodiment of the present invention is as follows：First resistor R1 and 3rd resistor R3 is usually contact resistance, contact
The impedance of resistance is usually several ohms, and the resistance of the fuse in fuse circuit 102 is also several ohms, generally 100
Ohm is following, and second resistance R2 resistance is 2 ohms, specifically depending on process condition；With contact impedance 10 in this circuit
Ohm, the resistance of fuse resistance are 20 ohm, second resistance R2 resistance is 2 ohm, reference voltage VREF is 0.1V, first
Exemplified by predeterminated voltage VIN is 10V；
Close second switch device K2 to second switch device K2 inputs control signal first, the first predeterminated voltage VIN
The first comparator U1 in ON-OFF control circuit 104 is inputed to by second switch device K2, now first comparator U1 is exported
High level, close metal-oxide-semiconductor Q, then the output end B1 outputs of metal-oxide-semiconductor are low level.
When the output end B1 outputs of metal-oxide-semiconductor are low level, first switch device 101 closes, and makes the first predeterminated voltage VIN
Access trims circuit, and the positive input voltage that the second comparator U2 is obtained according to voltage divider principle is：10/(R1+R2+Rfuse+
R3) * R2=0.46V, Rfuse are fuse resistance, and now the second comparator U2 exports high level.
When the second comparator U2 exports high level, input control signal disconnects second switch device K2, due to now
Second comparator U2 output is still high level, and then ensures that the output end B1 of metal-oxide-semiconductor is still low level, and then still make first
Switching device 101 is in the conduction state and entirely trims the unimpeded of circuit.
After fuse trims disconnection, the second comparator U2 positive input with pulling down to, is made due to second resistance R2
Its positive incoming level is 0, therefore the second comparator U2 output be low level, therefore makes first comparator U1 output be low
Level, metal-oxide-semiconductor Q cut-offs, metal-oxide-semiconductor output B1 is high level, then now first switch device 101 disconnects, the first predeterminated voltage VIN
The connection with entirely trimming circuit is disconnected, so as to realize the protection to internal circuit.
Further, it is also possible to it is to judge fuse according to the level state of the output signal of monitoring voltage comparison circuit 103
No fusing, in the present embodiment, when voltage comparator circuit 103 exports high level, fuse is in scorching hot state, works as voltage ratio
When exporting high level compared with circuit 103, fuse is in blown state.
Above content is to combine specific preferred embodiment further description made for the present invention, it is impossible to is assert
The specific implementation of the present invention is confined to these explanations.For general technical staff of the technical field of the invention,
Some equivalent substitutes or obvious modification are made on the premise of not departing from present inventive concept, and performance or purposes are identical, all should
It is considered as belonging to the scope of patent protection that the present invention is determined by the claims submitted.
Claims (8)
1. a kind of fuse trims circuit, it is characterised in that the fuse, which trims circuit, includes first switch device, voltage ratio
Compared with circuit and ON-OFF control circuit；
The input of the first switch device accesses the first predeterminated voltage, the output end connection insurance of the first switch device
The input of silk circuit, the output end of the fuse circuit connect the first voltage input of the voltage comparator circuit, institute
The second voltage input access reference voltage of voltage comparator circuit is stated, is opened described in the output end connection of the voltage comparator circuit
The first input end of control circuit is closed, the second input of the ON-OFF control circuit accesses initial enable signal, the switch
The output end of control circuit connects the control terminal of the first switch device；
The ON-OFF control circuit controls the first switch break-over of device according to the initial enable signal, so that described first
Switching device exports first predeterminated voltage to the fuse in the fuse circuit；The voltage comparator circuit is in institute
Enabled during stating fuse calcination according to the voltage of the fuse circuit output end and reference voltage generation conducting
Signal；The ON-OFF control circuit controls the first switch device in the conduction state according to the conducting enable signal；
When the blown fuse, voltage and the ginseng of the voltage comparator circuit according to the fuse circuit output end
Examine voltage generation shut-off enable signal；The ON-OFF control circuit controls the first switch device according to the shut-off enable signal
Part turns off.
2. fuse as claimed in claim 1 trims circuit, it is characterised in that the ON-OFF control circuit includes the 5th electricity
Resistance, first comparator, switching tube and the 6th resistance；
The first end of 5th resistance is the input of the ON-OFF control circuit, and the second end of the 5th resistance connects institute
State the in-phase input end of first comparator, the inverting input of the first comparator connects the reference voltage, and described first
The output end of comparator connects the control terminal of the switching tube, and the input of the switching tube is connected to ground, the switching tube
Output end connects the first end of the 6th resistance, the second termination voltage source of the 6th resistance, the output of the switching tube
Hold as the output end of the ON-OFF control circuit.
3. fuse as claimed in claim 2 trims circuit, it is characterised in that the switching tube is FET, triode
Or IGBT.
4. fuse as claimed in claim 3 trims circuit, it is characterised in that the switching tube is FET, the field
Grid, drain electrode and the source electrode of effect pipe are respectively the control terminal, output end and input of the switching tube.
5. fuse as claimed in claim 1 trims circuit, it is characterised in that the voltage comparator circuit compares including second
Device, first resistor and second resistance；
The first end of the first resistor be the voltage comparator circuit first voltage input, the second of the first resistor
End connects the first end of the second resistance and the in-phase input end of second comparator, the second termination of the second resistance
Ground, the inverting input of second comparator are the second voltage input of the voltage comparator circuit, and described second compares
The output end of device is the output end of the voltage comparator circuit.
6. fuse as claimed in claim 1 trims circuit, it is characterised in that the fuse, which trims circuit, also to be included initially
Enable signal generation circuit, the initial enable signal generation circuit include second switch device and the 4th resistance；
The first end of 4th resistance accesses the second predeterminated voltage, and the second end of the 4th resistance connects the second switch
The input of device, the output end of the second switch device connect the second input of the ON-OFF control circuit, and described the
The control terminal access external control signal of two switching devices；
The second switch device turns on to the ON-OFF control circuit according to external control signal and exports initial enable signal, when
When the first switch device is in the conduction state, turned off according to external control signal.
7. fuse as claimed in claim 1 trims circuit, it is characterised in that the fuse circuit is described more to be multiple
Individual fuse is connected in parallel.
8. fuse as claimed in claim 7 trims circuit, it is characterised in that the fuse circuit includes relay, limit
Leakage resistance and fuse；
The input of the relay is the input of the fuse circuit, and the output end of the relay connects current-limiting resistance
First end, the second end of the current-limiting resistance connects the first end of the fuse, and the second end of the fuse is described
The output end of fuse circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226375.4A CN104901266B (en) | 2015-05-06 | 2015-05-06 | Fuse trims circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510226375.4A CN104901266B (en) | 2015-05-06 | 2015-05-06 | Fuse trims circuit |
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| Publication Number | Publication Date |
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| CN104901266A CN104901266A (en) | 2015-09-09 |
| CN104901266B true CN104901266B (en) | 2018-01-19 |
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| CN201510226375.4A Active CN104901266B (en) | 2015-05-06 | 2015-05-06 | Fuse trims circuit |
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Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106786394B (en) * | 2016-11-28 | 2019-05-10 | 珠海恒途电子有限公司 | Interlock protection circuit |
| CN114498547B (en) * | 2022-01-11 | 2024-06-18 | 深圳市有为信息技术发展有限公司 | Configurable CAN terminal resistor matching circuit |
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| CN1696715A (en) * | 2004-05-07 | 2005-11-16 | 台湾积体电路制造股份有限公司 | System for Monitoring Electrical Fuse Resistance |
| CN1873830A (en) * | 2005-05-31 | 2006-12-06 | 恩益禧电子股份有限公司 | Fuse cutting test circuit, fuse cutting test method, and semiconductor circuit |
| CN101047036A (en) * | 2006-03-29 | 2007-10-03 | 富晶半导体股份有限公司 | Fuse inspection circuit and its inspection method |
| CN101882469A (en) * | 2009-05-08 | 2010-11-10 | 凹凸电子（武汉）有限公司 | Fuse circuit, system and method |
| CN103825601A (en) * | 2012-11-15 | 2014-05-28 | 东莞赛微微电子有限公司 | Fuse trimming and adjusting circuit |
| CN204720951U (en) * | 2015-05-06 | 2015-10-21 | 深圳市明微电子股份有限公司 | Fuse trims circuit |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006112501A1 (en) * | 2005-04-20 | 2006-10-26 | Matsushita Electric Industrial Co., Ltd. | Secondary battery protection circuit, battery pack and thermosensitive protection switch device |
| KR101016825B1 (en) * | 2009-02-24 | 2011-02-21 | 삼성에스디아이 주식회사 | Battery pack and over discharge protection method |
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- 2015-05-06 CN CN201510226375.4A patent/CN104901266B/en active Active
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1696715A (en) * | 2004-05-07 | 2005-11-16 | 台湾积体电路制造股份有限公司 | System for Monitoring Electrical Fuse Resistance |
| CN1873830A (en) * | 2005-05-31 | 2006-12-06 | 恩益禧电子股份有限公司 | Fuse cutting test circuit, fuse cutting test method, and semiconductor circuit |
| CN101047036A (en) * | 2006-03-29 | 2007-10-03 | 富晶半导体股份有限公司 | Fuse inspection circuit and its inspection method |
| CN101882469A (en) * | 2009-05-08 | 2010-11-10 | 凹凸电子（武汉）有限公司 | Fuse circuit, system and method |
| CN103825601A (en) * | 2012-11-15 | 2014-05-28 | 东莞赛微微电子有限公司 | Fuse trimming and adjusting circuit |
| CN204720951U (en) * | 2015-05-06 | 2015-10-21 | 深圳市明微电子股份有限公司 | Fuse trims circuit |
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| CN104901266A (en) | 2015-09-09 |
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