CN2205610Y - End swinging audio frequency amplifier - Google Patents
End swinging audio frequency amplifier Download PDFInfo
- Publication number
- CN2205610Y CN2205610Y CN 94231886 CN94231886U CN2205610Y CN 2205610 Y CN2205610 Y CN 2205610Y CN 94231886 CN94231886 CN 94231886 CN 94231886 U CN94231886 U CN 94231886U CN 2205610 Y CN2205610 Y CN 2205610Y
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- power
- amplifier
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- tube
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- Expired - Fee Related
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- 230000003321 amplification Effects 0.000 abstract description 5
- 238000003199 nucleic acid amplification method Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 abstract description 3
- 239000000725 suspension Substances 0.000 abstract 1
- 239000003990 capacitor Substances 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000001737 promoting effect Effects 0.000 description 1
- 230000005236 sound signal Effects 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
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Abstract
The utility model relates to an end swinging audio frequency amplifier, wherein, a main electronic circuit is composed of a comparing control driver stage, a power tube biasing stage and a power-amplifier stage. Because a signal ground is connected to the source electrode of a power-amplifier tube through resistors R10, R8 and R9, horse-power supplies E+ and E-present suspension states relative to the signal ground, which makes the driver stage only need to provide an essential signal for the input terminal of an energy amplification element, to obtain high output with high power. Thus the utility model simplifies the driver stage power circuit and has the advantages of less waste and high signal-noise ratio; different output power can be obtained only by selecting horse-power supplies of different voltages and amplification elements of different horse-power.
Description
The utility model relates to the power amplifier in a kind of broadcasting, sound equipment field, especially a kind of terminal oscillating-type audio power amplifying apparatus.
Present known audio-frequency power amplifier all is provided with a voltage amplification and promotes level, and makes it that sufficiently high output voltage be arranged before the high power valve of power-amplifier stage, purpose is to satisfy the needs of power amplifier output voltage swing.It is then higher that voltage amplification promotes grade supply voltage that is born.Therefore, along with the increase of power output, circuit complexity and wasting all of power supply that voltage amplification promotes level and power supply thereof are increasing, and to promoting level higher performance requirement have been arranged also.
The purpose of this utility model is, design a kind of promote level and power supply is simple more, power supply waste little, signal to noise ratio is high and the audio-frequency power amplifier that is easy to realize.
The technical solution of the utility model is: a kind of terminal oscillating-type audio power amplifying apparatus, by shell (1), dial gauge (2), mains switch (3), input socket (4), accessory power outlet (5), power supply and have a comparison controlling and driving level (6), power tube bias stage (7), the main electronic circuit of power-amplifier stage (8) is formed, it is characterized in that: the signal ground of power-amplifier stage is by resistance R 10 and resistance R 8, R9 tie point A is connected, and then pass through R8 respectively, R9 is connected to power amplifier tube T3, on the source electrode of T4, accessory power outlet (5) is connected with power power-supply mid point EO with respect to an end on item ground.
The utility model is with the signal ground of power-amplifier stage by resistance R 10(or directly) be connected on the tie point A of resistance R 8 and R9, and then respectively by R8, R9(or direct without R8, R9) be connected to the source electrode of power tube T3, T4 (if T3, T4 adopt bipolar transistor, then be emitter), thus make power power-supply E+, E-relative signal ground be suspended state.Like this, the amplifier element F of driving stage need not export the high voltage that satisfies the power amplifier output voltage swing, and only provide the most basic signal to the input of high power valve T3, the T4 of power-amplifier stage, just can on amplifier out (loud speaker), obtain big power output.Therefore, supply voltage V+, the V-of driving stage only need ± 5V～± 18V can satisfy the demand.
The utility model produces following good effect:
1) power unit of driving stage is simplified greatly, is easy to realize.
2) power supply wastes greatly and reduces.
3) power output and driving stage independent of power voltage.Promptly when the driving stage element is identical, only select the power power-supply of different voltages just can obtain different power output with different high power valves.
4) higher signal to noise ratio is arranged.
5) be easy to realize that no switch amplifies, suppress intermodulation distortion.
Figure one is the available a kind of schematic appearance of the utility model.
Figure two is the utility model master electronic-circuit diagram.
Among the figure one: (1) is shell, and (2) are the indication gauge outfit, and (3) are mains switch, and audio signal enters amplifier by input socket (4), and output signal is connected to loud speaker (audio amplifier) by accessory power outlet (5), and power supply is positioned at shell.
Figure two provides an embodiment of the present utility model:
The comparison controlling and driving level (6) of main electronic circuit is made of amplifier element F, capacitor C 1, C2, C3, resistance R 1, R2, R3, variable resistor (potentiometer) W1, W2, and V+, V-are the driving stage supply voltage.Audio input signal is input in the amplifier by input socket (4).Power tube bias stage (7) is by triode T1, T2, and weighing apparatus stream is managed D1, D2, capacitor C 4, C5, resistance R 4, R5, and variable resistor W3, W4 form.Power-amplifier stage (8) is by VMOS power tube T3, T4, diode D3, D4, and resistance R 6, R7, R8, R9, R10 form, and E+, E-are power power-supply voltage, and EO is the power power-supply mid point, and (5) are accessory power outlet.
Claims (3)
1, a kind of terminal oscillating-type audio power amplifying apparatus, form by shell (1), dial gauge (2), mains switch (3), input socket (4), accessory power outlet (5), power supply and main electronic circuit with comparison controlling and driving level (6), power tube bias stage (7), power-amplifier stage (8), it is characterized in that: the signal ground of power-amplifier stage is connected with resistance R 8, R9 tie point A by resistance R 10, and then be connected on the source electrode of power amplifier tube T3, T4 by R8, R9 respectively, accessory power outlet (5) is connected with power power-supply mid point E0 with respect to an end on item ground.
2, terminal oscillating-type audio power amplifying apparatus according to claim 1, it is characterized in that: described power-amplifier stage signal ground also can directly be connected on the tie point A of resistance R 8, R9, can also be without resistance R 10, R8, R9 and directly be connected on the source electrode of power amplifier tube T3, T4.
3, according to claim 1,2 described terminal pendulum merit type audio power amplifying apparatus, it is characterized in that: when described power amplifier tube T3, T4 adopted bipolar transistor, signal ground in kind was connected to its emitter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231886 CN2205610Y (en) | 1994-12-30 | 1994-12-30 | End swinging audio frequency amplifier |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 94231886 CN2205610Y (en) | 1994-12-30 | 1994-12-30 | End swinging audio frequency amplifier |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2205610Y true CN2205610Y (en) | 1995-08-16 |
Family
ID=33843596
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 94231886 Expired - Fee Related CN2205610Y (en) | 1994-12-30 | 1994-12-30 | End swinging audio frequency amplifier |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2205610Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976218B (en) * | 2005-11-30 | 2011-10-12 | 飞思卡尔半导体公司 | Low voltage low power class A/B output stage |
-
1994
- 1994-12-30 CN CN 94231886 patent/CN2205610Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1976218B (en) * | 2005-11-30 | 2011-10-12 | 飞思卡尔半导体公司 | Low voltage low power class A/B output stage |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |