CN102843632A - Voice-operated circuit - Google Patents
Voice-operated circuit Download PDFInfo
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- CN102843632A CN102843632A CN 201110171321 CN201110171321A CN102843632A CN 102843632 A CN102843632 A CN 102843632A CN 201110171321 CN201110171321 CN 201110171321 CN 201110171321 A CN201110171321 A CN 201110171321A CN 102843632 A CN102843632 A CN 102843632A
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- triode
- connects
- working power
- resistance
- collector electrode
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Abstract
The invention discloses a voice-operated circuit, which comprises a first triode and a second triode, wherein a working power supply is connected with the base of the first triode by a fourth resistor; the collector of the first triode is connected with the base of the second triode by a second resistor; the collector of the second triode is connected with a signal input/output end; a ceramic capacitor is connected between the signal input/output end and the ground; the working power supply is connected with the output end of an electret microphone by a fifth resistor; an ordinary capacitor is connected between the output end of the electret microphone and the base of the first triode; and the working power supply is connected with the collector of the first triode by a third resistor. The voice-operated circuit is simple in structure and convenient to use, and can be applied to a voice-operated switch.
Description
Technical field
The present invention relates to a kind of application circuit, concrete relate to a kind of sound control circuit.
Background technology
Sometimes need control sound in the circuit, sound has energy, and we can control voice signal through amplifying circuit.Existing sound control circuit is varied of a great variety, but most complex structure, function is complicated; And only need under the application scenario of function singleness at some, adopting complicated circuit construction often, cost can increase so on the one hand; In addition on the one hand; After circuit structure was in a single day complicated, its destabilizing factor was behind so just reducing product percent of pass virtually also increasing.
Summary of the invention
For overcoming deficiency of the prior art, the object of the present invention is to provide a kind of sound control circuit simple in structure.
In order to solve the problems of the technologies described above, realize above-mentioned purpose, the present invention has adopted following technical scheme:
A kind of sound control circuit; Comprise first triode and second triode; Working power connects the base stage of said first triode through the 4th resistance; The collector electrode of said first triode connects the base stage of said second triode through second resistance, and the collector electrode that connects said second triode connects signal input output end, is connected ceramic disc capacitor between said signal input output end and the ground; Said working power connects the output of Electret condenser microphone through the 5th resistance; Be connected common electric capacity between the base stage of the output of said Electret condenser microphone and said first triode, said working power connects the collector electrode of said first triode through the 3rd resistance.
Further, said working power connects the collector electrode of said second triode through first resistance.
The course of work of sound control circuit of the present invention is following:
Said Electret condenser microphone output signal is done one-level through first triode and is amplified, and the signal after the amplification is controlled by second triode, the collector electrode output corresponding signal of second triode.
The present invention has the following advantages:
Sound control circuit of the present invention simple in structure, easy to use.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. specify as after.Embodiment of the present invention is provided by following examples and accompanying drawing thereof in detail.
Description of drawings
Fig. 1 is the circuit theory diagrams of sound control circuit of the present invention.
Embodiment
Below in conjunction with accompanying drawing and embodiment technology implementation process of the present invention is further specified.
Referring to shown in Figure 1; A kind of sound control circuit; Comprise the first triode Q1 and the second triode Q2, working power VCC is through the base stage of the said first triode Q1 of the 4th resistance R 4 connections, and the collector electrode of the said first triode Q1 connects the base stage of the said second triode Q2 through second resistance R 2; The collector electrode that meets the said second triode Q2 connects signal input output end I/O, is connected ceramic disc capacitor C2 between said signal input output end I/O and the ground; Said working power VCC connects the output of Electret condenser microphone BM1 through the 5th resistance R 5; Be connected common electric capacity C1 between the base stage of the output of said Electret condenser microphone BM1 and the said first triode Q1, said working power VCC connects the collector electrode of the said first triode Q1 through the 3rd resistance R 3.
Further, said working power VCC connects the collector electrode of the said second triode Q2 through first resistance R 1.
The foregoing description just is to let the one of ordinary skilled in the art can understand content of the present invention and enforcement according to this in order technical conceive of the present invention and characteristics to be described, to be its objective is, can not limit protection scope of the present invention with this.The variation or the modification of every equivalence that the essence of content has been done according to the present invention all should be encompassed in protection scope of the present invention.
Claims (2)
1. sound control circuit; Comprise first triode (Q1) and second triode (Q2); It is characterized in that: working power (VCC) connects the base stage of said first triode (Q1) through the 4th resistance (R4); The collector electrode of said first triode (Q1) connects the base stage of said second triode (Q2) through second resistance (R2); The collector electrode of said second triode (Q2) connects signal input output end (I/O), is connected ceramic disc capacitor (C2) between said signal input output end (I/O) and the ground; Said working power (VCC) connects the output of Electret condenser microphone (BM1) through the 5th resistance (R5); Be connected common electric capacity (C1) between the base stage of the output of said Electret condenser microphone (BM1) and said first triode (Q1), said working power (VCC) connects the collector electrode of said first triode (Q1) through the 3rd resistance (R3).
2. sound control circuit according to claim 1 is characterized in that: said working power (VCC) connects the collector electrode of said second triode (Q2) through first resistance (R1).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171321 CN102843632A (en) | 2011-06-23 | 2011-06-23 | Voice-operated circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201110171321 CN102843632A (en) | 2011-06-23 | 2011-06-23 | Voice-operated circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102843632A true CN102843632A (en) | 2012-12-26 |
Family
ID=47370640
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201110171321 Pending CN102843632A (en) | 2011-06-23 | 2011-06-23 | Voice-operated circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102843632A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607189A (en) * | 2013-11-20 | 2014-02-26 | 桂林机床电器有限公司 | Voice operated switch circuit |
| CN109982014A (en) * | 2019-04-22 | 2019-07-05 | 合肥惠科金扬科技有限公司 | A kind of driving circuit and television set |
-
2011
- 2011-06-23 CN CN 201110171321 patent/CN102843632A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103607189A (en) * | 2013-11-20 | 2014-02-26 | 桂林机床电器有限公司 | Voice operated switch circuit |
| CN109982014A (en) * | 2019-04-22 | 2019-07-05 | 合肥惠科金扬科技有限公司 | A kind of driving circuit and television set |
| CN109982014B (en) * | 2019-04-22 | 2023-09-29 | 重庆惠科金扬科技有限公司 | Driving circuit and television |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C02 | Deemed withdrawal of patent application after publication (patent law 2001) | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20121226 |