CN102932711A - Wireless microphone signal transmitting circuit - Google Patents
Wireless microphone signal transmitting circuit Download PDFInfo
- Publication number
- CN102932711A CN102932711A CN2012104060286A CN201210406028A CN102932711A CN 102932711 A CN102932711 A CN 102932711A CN 2012104060286 A CN2012104060286 A CN 2012104060286A CN 201210406028 A CN201210406028 A CN 201210406028A CN 102932711 A CN102932711 A CN 102932711A
- Authority
- CN
- China
- Prior art keywords
- triode
- power supply
- supply vcc
- capacitor
- resistance
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Landscapes
- Transmitters (AREA)
- Amplifiers (AREA)
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
Dragons and fishes jumbled together for wireless microphone in the market, ordinary consumer consumption can't divide other present situation again, and a frequency is more stable, transmitting range is distant, the wireless microphone that can satisfy various demand is that consumers in general thirst for, common wireless microphone is by the transistorized collector electrode that changes oscillating circuit and the output frequency that the junction capacitance conversion between base stage changes oscillator, thereby realize the frequency-modulated wave that is modulated into to frequency of oscillation, by high frequency frequency selection circuit and amplifying circuit, at last 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:
A kind of 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 ends connect microphone, one end series connection rheostat W1, capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, with the signal coupling of the microphone MIC1 base stage to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, and resistance R 5 is the base resistance of Q1, and resistance R 5 provides bias voltage for Q1, the emitter of triode is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is stablized triode Q1 quiescent point here as negative feedback resistor, when the Q1 emitter current increases, R6 voltage raises, the voltage U ec of triode Q1 base stage and collector electrode reduces, and triode Q1 base current reduces, and the transistor collector electric current reduces, emitter current reduces, and voltage reduces on the resistance R 6; 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 the 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 transmitter 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, form the bikini resonant oscillator by C4 positive feedback electric capacity, C5 connects collector electrode and the power supply VCC positive pole of Q2, connect Q2 emitter and power supply VCC positive pole behind the inductance L 1 series connection C8, hold C7 every straight-through alternating current and connect Q2 emitter and power supply VCC negative pole; Described electric capacity R6 arrives the collector coupled of triode Q2 the base stage of triode Q3, 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, R10 is negative feedback resistor, 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 VCC of power supply VCC of L2, connect the collector electrode of Q3 behind the antenna E1 series connection C12, filter capacitor C13 connects power supply VCC both positive and negative polarity, and electric capacity of voltage regulation C14 connects the VCC both positive and negative polarity.
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 consists of are installed in the present invention additional before antenna, have promoted the 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 that receiving sensitivity is improved the resistance of biasing resistor, and after tested, the voice signal that reaches 15.20m can receive normally still that (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, so that circuit is made easily, 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.
Description of drawings
Fig. 1 is the physical circuit figure of invention.
Embodiment
A kind of 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 ends connect microphone, one end series connection rheostat W1, capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, with the signal coupling of the microphone MIC1 base stage to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, and resistance R 5 is the base resistance of Q1, and resistance R 5 provides bias voltage for Q1, the emitter of triode is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is stablized triode Q1 quiescent point here as negative feedback resistor, when the Q1 emitter current increases, R6 voltage raises, the voltage U ec of triode Q1 base stage and collector electrode reduces, and triode Q1 base current reduces, and the transistor collector electric current reduces, emitter current reduces, and voltage reduces on the resistance R 6; 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 the 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 transmitter 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, form the bikini resonant oscillator by C4 positive feedback electric capacity, C5 connects collector electrode and the power supply VCC positive pole of Q2, connect Q2 emitter and power supply VCC positive pole behind the inductance L 1 series connection C8, hold C7 every straight-through alternating current and connect Q2 emitter and power supply VCC negative pole; Described electric capacity R6 arrives the collector coupled of triode Q2 the base stage of triode Q3, 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, R10 is negative feedback resistor, 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 VCC of power supply VCC of L2, connect the collector electrode of Q3 behind the antenna E1 series connection C12, filter capacitor C13 connects power supply VCC both positive and negative polarity, and electric capacity of voltage regulation C14 connects the VCC both positive and negative polarity.
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 ends connect microphone, one end series connection rheostat W1, capacitor C 2, the base stage of capacitor C 2 other end connecting triode Q1, with the signal coupling of the microphone MIC1 base stage to triode Q1, the collector electrode of Q1 is connected with power supply VCC by R4, and resistance R 5 is the base resistance of Q1, and resistance R 5 provides bias voltage for Q1, the emitter of triode is connected with power supply VCC negative pole by resistance R 6, resistance R 6 is stablized triode Q1 quiescent point here as negative feedback resistor, when the Q1 emitter current increases, R6 voltage raises, the voltage U ec of triode Q1 base stage and collector electrode reduces, and triode Q1 base current reduces, and the transistor collector electric current reduces, emitter current reduces, and voltage reduces on the resistance R 6; 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 the 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 transmitter 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, form the bikini resonant oscillator by C4 positive feedback electric capacity, C5 connects collector electrode and the power supply VCC positive pole of Q2, connect Q2 emitter and power supply VCC positive pole behind the inductance L 1 series connection C8, hold C7 every straight-through alternating current and connect Q2 emitter and power supply VCC negative pole; Described electric capacity R6 arrives the collector coupled of triode Q2 the base stage of triode Q3, 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, R10 is negative feedback resistor, 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 VCC of power supply VCC of L2, connect the collector electrode of Q3 behind the antenna E1 series connection C12, filter capacitor C13 connects power supply VCC both positive and negative polarity, and electric capacity of voltage regulation C14 connects the VCC both positive and negative polarity.
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 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201210406028.6A CN102932711B (en) | 2012-10-23 | 2012-10-23 | Wireless microphone signal transmitting circuit |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102932711A true CN102932711A (en) | 2013-02-13 |
| CN102932711B CN102932711B (en) | 2014-12-10 |
Family
ID=47647395
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210406028.6A Expired - Fee Related CN102932711B (en) | 2012-10-23 | 2012-10-23 | Wireless microphone signal transmitting circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102932711B (en) |
Cited By (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 |
| CN105307083A (en) * | 2015-11-16 | 2016-02-03 | 北京兴科迪科技有限公司 | Vehicular microphone system |
| CN106954107A (en) * | 2017-04-25 | 2017-07-14 | 商丘学院 | A kind of wireless microphone |
| CN107623651A (en) * | 2017-06-30 | 2018-01-23 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
| CN109596111A (en) * | 2018-12-05 | 2019-04-09 | 柳州铁道职业技术学院 | A kind of total station for passing on a message |
| 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 |
Cited By (7)
| 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 |
| CN105307083A (en) * | 2015-11-16 | 2016-02-03 | 北京兴科迪科技有限公司 | Vehicular microphone system |
| 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 |
| CN107623651A (en) * | 2017-06-30 | 2018-01-23 | 中国建筑第七工程局有限公司 | A kind of intelligence community |
| CN109596111A (en) * | 2018-12-05 | 2019-04-09 | 柳州铁道职业技术学院 | A kind of total station for passing on a message |
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| CN102932711B (en) | 2014-12-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102932711B (en) | Wireless microphone signal transmitting circuit | |
| CN203352538U (en) | Voltage-controlled oscillator circuit | |
| CN202696583U (en) | Multi-functional minitype frequency modulation emitter | |
| CN203368448U (en) | Remote control doorbell transmitter | |
| CN109480332B (en) | Ultrasonic electronic cigarette frequency tracking circuit and ultrasonic electronic cigarette | |
| CN202737853U (en) | FM transmitter with low power and high sensitivity | |
| CN203180902U (en) | A frequency modulation transmitter with strong anti-interference performance | |
| CN101420237A (en) | Monitoring circuit | |
| CN204304928U (en) | A kind of voltage-controlled oscillator circuit | |
| CN103516385A (en) | Wireless communication device | |
| CN202750078U (en) | FM transmitter with low power and high sensitivity | |
| CN202043264U (en) | Frequency modulation wireless microphone circuit with voltage stabilizing circuit | |
| CN103427851A (en) | Multifunctional miniature frequency modulation emitter | |
| CN204206394U (en) | A kind of wireless microphone of reliable operation | |
| CN202737852U (en) | Multifunctional minisize frequency modulation emitter | |
| CN205249188U (en) | Outdoor solar energy frequency modulation wireless transmitter | |
| CN202019340U (en) | THS3001-based high-frequency wideband amplifier circuit | |
| CN204290891U (en) | A kind of wideband power amplifer circuit | |
| CN204439729U (en) | A kind of examination hall communication apparatus detector circuit | |
| CN204697017U (en) | A kind of intercom audio amplifier circuit | |
| CN203166882U (en) | Novel long-distance transmitter | |
| CN203504550U (en) | Receiver circuit for remote router | |
| CN203761332U (en) | Gigahertz base frequency low-phase noise oscillation circuit | |
| CN203233413U (en) | A simple frequency modulation communication instrument | |
| CN203851135U (en) | Microwave signal emission circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| 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: 20141210 Termination date: 20151023 |
|
| EXPY | Termination of patent right or utility model |