CN203423796U - Microphone amplifier with micro power consumption and high sensitivity - Google Patents
Microphone amplifier with micro power consumption and high sensitivity Download PDFInfo
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- CN203423796U CN203423796U CN201320565214.4U CN201320565214U CN203423796U CN 203423796 U CN203423796 U CN 203423796U CN 201320565214 U CN201320565214 U CN 201320565214U CN 203423796 U CN203423796 U CN 203423796U
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Abstract
The utility model relates to a microphone amplifier with micro power consumption and high sensitivity. One end of the microphone is connected to one end of the base electrode of a first triode, the other end of the microphone is connected with one end of the electrode of a diode, the emitting electrode of the first triode is sequentially connected with a third resistor and the other end of the electrode of a diode, one end of the collecting electrode of the first triode is connected with one end of base electrode of a second triode, and one end of the collecting electrode of the second triode is connected with the output end. The microphone amplifier with micro power consumption and high sensitivity has the advantages that the circuit is simple, the power consumption is small, the sensitivity is high, the work voltage range is wide, the production cost is low, and the like.
Description
Technical field
The utility model relates to a kind of electric equipment products, particularly micro-power consumption high sensitivity amplifier of microphone.
Background technology
Along with social development, the utilance of microphone is more and more higher.But, the problem such as the amplifier of microphone ubiquity power consumption of using is at present larger, and sound detection sensitivity is low.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned deficiency, and micro-power consumption high sensitivity amplifier of microphone that a kind of circuit is simple, power consumption is little, highly sensitive, operating voltage range is wide, cost is low is provided.
To achieve these goals, the utility model has been taked following technical scheme.
The micro-power consumption high sensitivity of the utility model amplifier of microphone, one end of microphone is connected with first transistor base one end, the other end of microphone is connected with electrode one end of diode, the emitter of described the first triode is connected with the electrode other end of the 3rd resistance and diode successively, collector electrode one end of described the first triode is connected with base stage one end of the second triode, collector electrode one end of described the second triode is connected with output
Base stage one end of one end of described microphone and the first triode is connected with one end of the 4th resistance respectively, the other end of described the 4th resistance is connected with the emitter of the second triode, and described the first triode is connected with power supply by first resistance the second resistance with the second triode.
Between described microphone and the 4th resistance, be connected with the first electrochemical capacitor, one end of described the first electrochemical capacitor is connected with the emitter of the second triode.
Electrode one end of described microphone and diode is connected with one end of the second electrochemical capacitor, and the other end of described the second electrochemical capacitor is connected with one end and the power supply of the first resistance, the second resistance respectively.
The micro-power consumption high sensitivity of the utility model amplifier of microphone is because its microphone two ends are parallel with triode and diode, can be microphone stable operating voltage is provided, in circuit, adopt two-stage to amplify simultaneously, can improve multiplication factor, for sound light control lighting lamp provides highly sensitive sound control signal, therefore, there is the beneficial effects such as circuit structure is simple, power consumption is little, highly sensitive, operating voltage range is wide.
Accompanying drawing explanation
Fig. 1 is the micro-power consumption high sensitivity of the utility model amplifier of microphone circuit theory diagrams.
Embodiment
As shown in Figure 1, the micro-power consumption high sensitivity of the utility model amplifier of microphone, one end of its microphone 11 is connected with first triode 7 base stage one end, the other end of microphone 11 is connected with electrode one end of diode 9, the emitter of described the first triode 7 is connected with the electrode other end of the 3rd resistance 8 and diode 9 successively, for microphone provides stable operating voltage.Collector electrode one end of described the first triode 7 is connected with base stage one end of the second triode 6, and collector electrode one end of described the second triode 6 is connected with output 4, and sound, after the first triode 7 and the second triode 6 two-stages amplifications, is exported by output 4.
In addition, base stage one end of one end of described microphone 11 and the first triode 7 is connected with one end of the 4th resistance 10 respectively, the other end of described the 4th resistance 10 is connected with the emitter of the second triode 6, and described the first triode 7 is connected with power supply 1 by the first resistance 3 second resistance 5 with the second triode 6.Between described microphone 11 and the 4th resistance 10, be connected with the first electrochemical capacitor 12, one end of described the first electrochemical capacitor 12 is connected with the emitter of the second triode 6.Electrode one end of described microphone 11 and diode 9 is connected with one end of the second electrochemical capacitor 2, and the other end of described the second electrochemical capacitor 2 is connected with one end and the power supply 1 of the first resistance 3, the second resistance 5 respectively.
The utility model can be used on energy-saving sound light-operated lighting sound detection circuit occasion.
Claims (4)
1. a micro-power consumption high sensitivity amplifier of microphone, it is characterized in that: one end of microphone (11) is connected with the first triode (7) base stage one end, the other end of microphone (11) is connected with electrode one end of diode (9), the emitter of described the first triode (7) is connected with the electrode other end of diode (9) with the 3rd resistance (8) successively, collector electrode one end of described the first triode (7) is connected with base stage one end of the second triode (6), and collector electrode one end of described the second triode (6) is connected with output (4).
2. micro-power consumption high sensitivity amplifier of microphone according to claim 1, it is characterized in that: base stage one end of one end of described microphone (11) and the first triode (7) is connected with one end of the 4th resistance (10) respectively, the other end of described the 4th resistance (10) is connected with the emitter of the second triode (6), and described the first triode (7) is connected with power supply (1) by the first resistance (3) second resistance (5) with the second triode (6).
3. micro-power consumption high sensitivity amplifier of microphone according to claim 1 and 2, it is characterized in that: between described microphone (11) and the 4th resistance (10), be connected with the first electrochemical capacitor (12), one end of described the first electrochemical capacitor (12) is connected with the emitter of the second triode (6).
4. micro-power consumption high sensitivity amplifier of microphone according to claim 1, it is characterized in that: electrode one end of described microphone (11) and diode (9) is connected with one end of the second electrochemical capacitor (2), the other end of described the second electrochemical capacitor (2) is connected with one end and the power supply (1) of the first resistance (3), the second resistance (5) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320565214.4U CN203423796U (en) | 2013-09-12 | 2013-09-12 | Microphone amplifier with micro power consumption and high sensitivity |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320565214.4U CN203423796U (en) | 2013-09-12 | 2013-09-12 | Microphone amplifier with micro power consumption and high sensitivity |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203423796U true CN203423796U (en) | 2014-02-05 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320565214.4U Expired - Fee Related CN203423796U (en) | 2013-09-12 | 2013-09-12 | Microphone amplifier with micro power consumption and high sensitivity |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203423796U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464787A (en) * | 2014-11-27 | 2015-03-25 | 天津天地伟业数码科技有限公司 | Circuit and method for controlling audio acquisition of embedded court trail all-in-one machine |
-
2013
- 2013-09-12 CN CN201320565214.4U patent/CN203423796U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104464787A (en) * | 2014-11-27 | 2015-03-25 | 天津天地伟业数码科技有限公司 | Circuit and method for controlling audio acquisition of embedded court trail all-in-one machine |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140205 Termination date: 20140912 |
|
| EXPY | Termination of patent right or utility model |