CN102932711B - Wireless microphone signal transmitting circuit - Google Patents
Wireless microphone signal transmitting circuit Download PDFInfo
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- CN102932711B CN102932711B CN201210406028.6A CN201210406028A CN102932711B CN 102932711 B CN102932711 B CN 102932711B CN 201210406028 A CN201210406028 A CN 201210406028A CN 102932711 B CN102932711 B CN 102932711B
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Abstract
The invention provides a wireless microphone signal transmitting circuit, comprising a microphone MIC1, a power supply VCC, resistors R1 and R4-R10, capacitors C1-C14, triodes Q1-Q3, inductances L1-L3, a rheostat W1 and an antenna E1, wherein the resistor R1 is a bias resistor of the microphone MIC1, one end of the microphone MIC1 is connected with the anode of the power supply VCC, one end of the microphone MIC1 is connected with the cathode of the power supply VCC, one end of the capacitor C1 is connected with the anode of the microphone, one end of the capacitor C1 is connected with the rheostat W1 and the capacitor C2 in series, the other end of the capacitor C2 is connected with the base of the triode Q1, a signal of the microphone MIC1 is coupled to the base of the triode Q1, the collector of the Q1 is connected with the power supply VCC by virtue of the R4, and the resistor R5 is a base resistor of Q1. A capacitor three-point oscillating circuit is adopted, so that a circuit is easy to manufacture, and manufacturing cost is low; and the wireless microphone signal transmitting circuit provided by the invention has the advantages of stable transmitting frequency, long transmitting distance and low energy consumption.
Description
Technical field
The present invention relates to wireless communication technology, a kind of wireless Mike's signal transmission circuit is provided.
Background technology
For wireless microphone in the market, dragons and fishes jumbled together, ordinary consumer consumption cannot divide other present situation again, and a frequency is more stable, transmitting range is distant, the wireless microphone that can meet various demand is that consumers in general thirst for, common wireless microphone is by changing the transistorized collector electrode of oscillating circuit and the output frequency that the junction capacitance between base stage converts to change oscillator, thereby realize the frequency-modulated wave that is modulated into frequency of oscillation, by high frequency frequency selection circuit and amplifying circuit, finally by antenna to external radiation.
Summary of the invention
The object of the present invention is to provide a kind of transmitting range far away, stable performance, a kind of wireless Mike's signal transmission circuit simple in structure.
The present invention is to achieve these goals by the following technical solutions:
Wireless Mike's signal transmission circuit, is characterized in that: comprise microphone MIC1, power supply VCC, resistance R 1, R4, R5, R6, R7, R8, R9, R10, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, triode Q1, Q2, Q3, inductance L 1, L2, L3, rheostat W1, antenna E1, described resistance R 1 is the biasing resistor of microphone MIC1, microphone MIC1 one end is connected by the positive level of R1 and power supply VCC, one end is connected with power supply VCC negative pole, it is anodal that described capacitor C 1 one end connects microphone, a stiff end of one end series connection rheostat W1, another of series connection rheostat W1 be termination power VCC negative pole fixedly, the sliding end of rheostat W1 connects capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, base stage by the signal coupling of microphone MIC1 to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, the base resistance that resistance R 5 is Q1, resistance R 5 provides bias voltage for Q1, the emitter of triode Q1 is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is here as negative feedback resistor, stablize triode Q1 quiescent point, when Q1 emitter current increases, R6 voltage raises, the voltage U bc of triode Q1 base stage and collector electrode reduces, triode Q1 base current reduces, transistor collector electric current reduces, emitter current reduces, in resistance R 6, voltage reduces, described capacitor C 3 is coupled to the collector signal of triode Q1 the base stage of triode Q2, described Q2, R7, R8, C4, C5, L1, C6, C7 forms high frequency oscillation circuit, the base stage of Q2 is connected with power supply VCC by R7, R7 provides base bias current for Q2, C4 is base stage and the power supply VCC negative pole that feedback capacity connects Q2, R8 is negative feedback resistor, connect the emitter of Q2 and the negative pole of power supply VCC, stablize the quiescent point of Q2, triode Q2 employing 9018 and capacitor C 4, C5, C6 forms the oscillator of a capacitance three-point type, load C 5 by the collector electrode of triode Q2, L1 forms a resonator, by C4 positive feedback electric capacity, form bikini resonant oscillator, C5 connects collector electrode and the power supply VCC positive pole of Q2, after inductance L 1 series connection C8, connect Q2 emitter and power supply VCC positive pole, every straight-through alternating current, hold C7 and connect Q2 emitter and power supply VCC negative pole, described capacitor C 6 is the base stage to triode Q3 by the collector coupled of triode Q2, Q3, R9, R10, L2, C10, C11 forms high-frequency power amplifying circuit, and the just very triode Q3 of the base stage of R9 connecting triode Q3 and power supply VCC provides base current, and R10 is negative feedback resistor, the negative pole of the emitter of connecting triode Q3 and power supply VCC, stablize the quiescent point of triode Q3, C10, the be connected in parallel collector electrode of the anodal and triode Q3 of power supply VCC of L2, after antenna E1 series inductance L3, C12, then, the collector electrode that connects Q3, filter capacitor C13 connects power supply VCC both positive and negative polarity, electric capacity of voltage regulation C14 connects VCC both positive and negative polarity, and described triode Q1 and triode Q2 are NPN triode, capacitor C 9 one termination power VCC, other end ground connection, capacitor C 10 1 termination power VCC, the collector electrode of another termination triode Q3, resistance R 5 is connected between the base stage and collector electrode of triode Q1, the emitter of capacitor C 11 1 termination triode Q3, other end ground connection.
The present invention has following beneficial effect:
One, frequency stabilization of the present invention, transmitting range is than far away.
Two, inductance L 3 and the series loop that C12 forms are installed in the present invention additional before antenna, have promoted antenna transmission effect.
Three, the present invention adopts 3 condenser type oscillating circuits, and not only simple but also reliable, starting of oscillation is easy.The present invention reduces to make it to receiving sensitivity, to improve the resistance of biasing resistor, and after tested, the voice signal that reaches 15.20m still can normally receive (temperature: 28), and this is the test of carrying out under the environment of a lot of electromagnetic interference having, and tests respond well.
Four, the emitter of triode of the present invention has all adopted negative feedback resistor, has stablized the quiescent point of triode, and the stability of amplifying circuit is provided.
Five, the present invention adopts Colpitts oscillation circuit, and circuit is easily made, and cost of manufacture is also cheap, and it is stable to possess tranmitting frequency, and transmitting range is far away, advantage that energy consumption is low etc.
Accompanying drawing explanation
Fig. 1 is the physical circuit figure of invention.
Embodiment
Wireless Mike's signal transmission circuit, is characterized in that: comprise microphone MIC1, power supply VCC, resistance R 1, R4, R5, R6, R7, R8, R9, R10, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, triode Q1, Q2, Q3, inductance L 1, L2, L3, rheostat W1, antenna E1, described resistance R 1 is the biasing resistor of microphone MIC1, microphone MIC1 one end is connected by the positive level of R1 and power supply VCC, one end is connected with power supply VCC negative pole, it is anodal that described capacitor C 1 one end connects microphone, a stiff end of one end series connection rheostat W1, another of series connection rheostat W1 be termination power VCC negative pole fixedly, the sliding end of rheostat W1 connects capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, base stage by the signal coupling of microphone MIC1 to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, the base resistance that resistance R 5 is Q1, resistance R 5 provides bias voltage for Q1, the emitter of triode Q1 is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is here as negative feedback resistor, stablize triode Q1 quiescent point, when Q1 emitter current increases, R6 voltage raises, the voltage U bc of triode Q1 base stage and collector electrode reduces, triode Q1 base current reduces, transistor collector electric current reduces, emitter current reduces, in resistance R 6, voltage reduces, described capacitor C 3 is coupled to the collector signal of triode Q1 the base stage of triode Q2, described Q2, R7, R8, C4, C5, L1, C6, C7 forms high frequency oscillation circuit, the base stage of Q2 is connected with power supply VCC by R7, R7 provides base bias current for Q2, C4 is base stage and the power supply VCC negative pole that feedback capacity connects Q2, R8 is negative feedback resistor, connect the emitter of Q2 and the negative pole of power supply VCC, stablize the quiescent point of Q2, triode Q2 employing 9018 and capacitor C 4, C5, C6 forms the oscillator of a capacitance three-point type, load C 5 by the collector electrode of triode Q2, L1 forms a resonator, by C4 positive feedback electric capacity, form bikini resonant oscillator, C5 connects collector electrode and the power supply VCC positive pole of Q2, after inductance L 1 series connection C8, connect Q2 emitter and power supply VCC positive pole, every straight-through alternating current, hold C7 and connect Q2 emitter and power supply VCC negative pole, described capacitor C 6 is the base stage to triode Q3 by the collector coupled of triode Q2, Q3, R9, R10, L2, C10, C11 forms high-frequency power amplifying circuit, and the just very triode Q3 of the base stage of R9 connecting triode Q3 and power supply VCC provides base current, and R10 is negative feedback resistor, the negative pole of the emitter of connecting triode Q3 and power supply VCC, stablize the quiescent point of triode Q3, C10, the be connected in parallel collector electrode of the anodal and triode Q3 of power supply VCC of L2, after antenna E1 series inductance L3, C12, then, the collector electrode that connects Q3, filter capacitor C13 connects power supply VCC both positive and negative polarity, electric capacity of voltage regulation C14 connects VCC both positive and negative polarity, described triode Q1 and triode Q2 are NPN triode, capacitor C 9 one termination power VCC, other end ground connection, capacitor C 10 1 termination power VCC, the collector electrode of another termination triode Q3, resistance R 5 is connected between the base stage and collector electrode of triode Q1.
Claims (1)
1. wireless Mike's signal transmission circuit, is characterized in that: comprise microphone MIC1, power supply VCC, resistance R 1, R4, R5, R6, R7, R8, R9, R10, capacitor C 1, C2, C3, C4, C5, C6, C7, C8, C9, C10, C11, C12, C13, C14, triode Q1, Q2, Q3, inductance L 1, L2, L3, rheostat W1, antenna E1, described resistance R 1 is the biasing resistor of microphone MIC1, microphone MIC1 one end is connected by the positive level of R1 and power supply VCC, one end is connected with power supply VCC negative pole, it is anodal that described capacitor C 1 one end connects microphone, a stiff end of one end series connection rheostat W1, another of series connection rheostat W1 be termination power VCC negative pole fixedly, the sliding end of rheostat W1 connects capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, base stage by the signal coupling of microphone MIC1 to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, the base resistance that resistance R 5 is Q1, resistance R 5 provides bias voltage for Q1, the emitter of triode Q1 is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is here as negative feedback resistor, stablize triode Q1 quiescent point, when Q1 emitter current increases, R6 voltage raises, the voltage U bc of triode Q1 base stage and collector electrode reduces, triode Q1 base current reduces, transistor collector electric current reduces, emitter current reduces, in resistance R 6, voltage reduces, described capacitor C 3 is coupled to the collector signal of triode Q1 the base stage of triode Q2, described Q2, R7, R8, C4, C5, L1, C6, C7 forms high frequency oscillation circuit, the base stage of Q2 is connected with power supply VCC by R7, R7 provides base bias current for Q2, C4 is base stage and the power supply VCC negative pole that feedback capacity connects Q2, R8 is negative feedback resistor, connect the emitter of Q2 and the negative pole of power supply VCC, stablize the quiescent point of Q2, triode Q2 employing 9018 and capacitor C 4, C5, C6 forms the oscillator of a capacitance three-point type, load C 5 by the collector electrode of triode Q2, L1 forms a resonator, by C4 positive feedback electric capacity, form bikini resonant oscillator, C5 connects collector electrode and the power supply VCC positive pole of Q2, after inductance L 1 series connection C8, connect Q2 emitter and power supply VCC positive pole, every straight-through alternating current, hold C7 and connect Q2 emitter and power supply VCC negative pole, described capacitor C 6 is the base stage to triode Q3 by the collector coupled of triode Q2, Q3, R9, R10, L2, C10, C11 forms high-frequency power amplifying circuit, and the just very triode Q3 of the base stage of R9 connecting triode Q3 and power supply VCC provides base current, and R10 is negative feedback resistor, the negative pole of the emitter of connecting triode Q3 and power supply VCC, stablize the quiescent point of triode Q3, C10, the be connected in parallel collector electrode of the anodal and triode Q3 of power supply VCC of L2, after antenna E1 series inductance L3, C12, then, the collector electrode that connects Q3, filter capacitor C13 connects power supply VCC both positive and negative polarity, electric capacity of voltage regulation C14 connects VCC both positive and negative polarity, and described triode Q1 and triode Q2 are NPN triode, capacitor C 9 one termination power VCC, other end ground connection, capacitor C 10 1 termination power VCC, the collector electrode of another termination triode Q3, resistance R 5 is connected between the base stage and collector electrode of triode Q1, the emitter of capacitor C 11 1 termination triode Q3, other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406028.6A CN102932711B (en) | 2012-10-23 | 2012-10-23 | Wireless microphone signal transmitting circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406028.6A CN102932711B (en) | 2012-10-23 | 2012-10-23 | Wireless microphone signal transmitting circuit |
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| CN102932711A CN102932711A (en) | 2013-02-13 |
| CN102932711B true CN102932711B (en) | 2014-12-10 |
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| CN201210406028.6A Expired - Fee Related CN102932711B (en) | 2012-10-23 | 2012-10-23 | Wireless microphone signal transmitting circuit |
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Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105137796A (en) * | 2015-08-31 | 2015-12-09 | 成都科创城科技有限公司 | Solar wireless induction charging intelligent household bracelet |
| CN105307083B (en) * | 2015-11-16 | 2018-06-01 | 北京兴科迪科技有限公司 | A kind of car microphone system |
| CN106954107A (en) * | 2017-04-25 | 2017-07-14 | 商丘学院 | A kind of wireless microphone |
| CN107623651B (en) * | 2017-06-30 | 2018-08-03 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
| CN109596111B (en) * | 2018-12-05 | 2021-09-10 | 柳州铁道职业技术学院 | Total station for transmitting telephone |
| CN110308440A (en) * | 2019-08-01 | 2019-10-08 | 深圳市易探科技有限公司 | A kind of double antenna transmitting-receiving separation 5.8GHz moving Object Detection sensor |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007312260A (en) * | 2006-05-22 | 2007-11-29 | Audio Technica Corp | Microphone circuit |
| CN202043264U (en) * | 2011-04-27 | 2011-11-16 | 何桂英 | Frequency modulation wireless microphone circuit with voltage stabilizing circuit |
| CN102724601A (en) * | 2012-07-01 | 2012-10-10 | 刘昭利 | Single-tube frequency modulation wireless microphone |
-
2012
- 2012-10-23 CN CN201210406028.6A patent/CN102932711B/en not_active Expired - Fee Related
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2007312260A (en) * | 2006-05-22 | 2007-11-29 | Audio Technica Corp | Microphone circuit |
| CN202043264U (en) * | 2011-04-27 | 2011-11-16 | 何桂英 | Frequency modulation wireless microphone circuit with voltage stabilizing circuit |
| CN102724601A (en) * | 2012-07-01 | 2012-10-10 | 刘昭利 | Single-tube frequency modulation wireless microphone |
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| CN102932711A (en) | 2013-02-13 |
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