CN106255001A - A kind of low-voltage FM circuit - Google Patents
A kind of low-voltage FM circuit Download PDFInfo
- Publication number
- CN106255001A CN106255001A CN201610621063.8A CN201610621063A CN106255001A CN 106255001 A CN106255001 A CN 106255001A CN 201610621063 A CN201610621063 A CN 201610621063A CN 106255001 A CN106255001 A CN 106255001A
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- China
- Prior art keywords
- circuit
- electric capacity
- audion
- resistance
- voltage
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Classifications
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R3/00—Circuits for transducers, loudspeakers or microphones
-
- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R2430/00—Signal processing covered by H04R, not provided for in its groups
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Alarm Systems (AREA)
Abstract
The present invention provides a kind of low-voltage FM circuit, including battery, acoustical signal input circuit, audion biasing circuit, oscillating circuit and high-frequency signal radiating circuit, described acoustical signal input circuit is made up of Electret condenser microphone, the first resistance, the first electrochemical capacitor, output termination one end of the first resistance of Electret condenser microphone and the negative pole of the first electrochemical capacitor, be connected the metal shell of Electret condenser microphone and circuit.It is simple that low-voltage battery frequency modulation wireless microphone of the present invention has circuit structure, and higher-order of oscillation frequency stable, transmitting range reach 50 meters, the feature such as power consumption is few, cost of manufacture is low.When cell voltage is less than 1 volt, can report to the police, thus prompting carries out battery altering.
Description
Technical field
The present invention relates to circuit field, a kind of low-voltage FM circuit.
Background technology
The raising required living standard along with development and the people of automatic technology, the fidelity such as wireless headset requires relatively
High audio signal transmission, can be at lyceum for the activity such as aided education or Karaoke.Low-voltage battery frequency modulation wireless microphone
Having circuit structure simple, higher-order of oscillation frequency stable, transmitting range reach 25 meters, power consumption is few, make the features such as this is low.
Summary of the invention
In order to overcome the deficiency in background technology, the invention discloses a kind of low-voltage FM circuit.
The technical scheme is that a kind of low-voltage FM circuit, including battery, acoustical signal input circuit, three poles
Pipe biasing circuit, oscillating circuit and high-frequency signal radiating circuit, described acoustical signal input circuit is by Electret condenser microphone, the first electricity
Resistance, the first electrochemical capacitor composition, one end of output termination first resistance of Electret condenser microphone and the negative pole of the first electrochemical capacitor, stay
It is connected the metal shell of electret microphone and circuit, the other end connection circuit positive pole of the first resistance, the positive pole of the first electrochemical capacitor
Connect the base stage of audion;Described audion biasing circuit is made up of audion and the second resistance, and the base stage of audion connects the second electricity
One end of resistance, the other end connection circuit positive pole of the second resistance;Described oscillating circuit and high-frequency signal radiating circuit are by audion, height
Frequently oscillator coil, the 3rd electric capacity, the second electric capacity, negative feedback electric capacity, the 5th electric capacity, negative feedback resistor, coupling electric capacity and transmitting sky
Line forms, the colelctor electrode of audion and one end of higher-order of oscillation coil, one end of the 5th electric capacity, one end of negative feedback electric capacity and coupling
The one end closing electric capacity is connected, the other end of higher-order of oscillation coil and the other end connection circuit positive pole of the 5th electric capacity, coupling electric capacity
Antenna is penetrated in other end sending and receiving, the emitter stage of audion and the other end of negative feedback electric capacity, one end of negative feedback resistor and the 3rd electricity
The one end held is connected, the other end connection circuit positive pole of the 3rd electric capacity, is connected the other end of negative feedback resistor and circuit;Described electricity
Pond positive pole is connected with circuit anode, is connected battery cathode and circuit, also includes a controller and warning circuit, described controller
Being connected with warning circuit, battery, described controller receives the numerical value of voltage, and executes to warning circuit according to the numerical value received
Increase control signal.
Preferably, when cell voltage is less than 1 volt, described controller applies control signal to warning circuit.
Beneficial effects of the present invention: it is simple that low-voltage battery frequency modulation wireless microphone of the present invention has circuit structure, high frequency vibrating
Swing frequency stable, transmitting range reaches 50 meters, the feature such as power consumption is few, cost of manufacture is low.When cell voltage is less than 1 volt, can
To report to the police, thus prompting carries out battery altering.
Detailed description of the invention
The embodiment provided the present invention in conjunction with specific embodiments is described in further detail:
The low-voltage FM circuit of the present invention, including battery, acoustical signal input circuit, audion biasing circuit, vibration
Circuit and high-frequency signal radiating circuit, described acoustical signal input circuit is by Electret condenser microphone, the first resistance, the first electrochemical capacitor
Composition, one end of output termination first resistance of Electret condenser microphone and the negative pole of the first electrochemical capacitor, the metal of Electret condenser microphone
Being connected, the other end connection circuit positive pole of the first resistance, the positive pole of the first electrochemical capacitor connects the base stage of audion shell and circuit;
Described audion biasing circuit is made up of audion and the second resistance, and the base stage of audion connects one end of the second resistance, the second electricity
The other end connection circuit positive pole of resistance;Described oscillating circuit and high-frequency signal radiating circuit by audion, higher-order of oscillation coil, the 3rd
Electric capacity, the second electric capacity, negative feedback electric capacity, the 5th electric capacity, negative feedback resistor, coupling electric capacity become with transmission antenna group, audion
One end of colelctor electrode and higher-order of oscillation coil, one end of the 5th electric capacity, one end of negative feedback electric capacity and couple one end phase of electric capacity
Even, the other end of higher-order of oscillation coil and the other end connection circuit positive pole of the 5th electric capacity, sky is penetrated in the other end sending and receiving of coupling electric capacity
Line, the emitter stage of audion is connected with one end of the other end of negative feedback electric capacity, one end of negative feedback resistor and the 3rd electric capacity, the
The other end connection circuit positive pole of three electric capacity, is connected the other end of negative feedback resistor and circuit;Described anode is with circuit just
The most connected, it is connected battery cathode and circuit, also includes a controller and warning circuit, described controller and warning circuit, electricity
Pond is connected, and described controller receives the numerical value of voltage, and to apply control signal to warning circuit according to the numerical value received.
Preferably, when cell voltage is less than 1 volt, described controller applies control signal to warning circuit.At battery
When voltage is less than 1 volt, can report to the police, thus prompting carries out battery altering.
In this description, the present invention is described with reference to its specific embodiment.But it is clear that still can make
Various modifications and alterations are without departing from the spirit and scope of the present invention.Therefore, description is considered as illustrative rather than limits
Property processed.
Claims (2)
1. a low-voltage FM circuit, it is characterised in that include battery, acoustical signal input circuit, audion biasing circuit,
Oscillating circuit and high-frequency signal radiating circuit, described acoustical signal input circuit is by Electret condenser microphone, the first resistance, the first electrolysis
Electric capacity forms, one end of output termination first resistance of Electret condenser microphone and the negative pole of the first electrochemical capacitor, Electret condenser microphone
Being connected, the other end connection circuit positive pole of the first resistance, the positive pole of the first electrochemical capacitor connects audion metal shell and circuit
Base stage;Described audion biasing circuit is made up of audion and the second resistance, and the base stage of audion connects one end of the second resistance, the
The other end connection circuit positive pole of two resistance;Described oscillating circuit and high-frequency signal radiating circuit by audion, higher-order of oscillation coil,
3rd electric capacity, the second electric capacity, negative feedback electric capacity, the 5th electric capacity, negative feedback resistor, coupling electric capacity become with transmission antenna group, three poles
One end, one end of the 5th electric capacity, one end of negative feedback electric capacity of the colelctor electrode of pipe and higher-order of oscillation coil and couple the one of electric capacity
End is connected, the other end of higher-order of oscillation coil and the other end connection circuit positive pole of the 5th electric capacity, the other end sending and receiving of coupling electric capacity
Penetrate antenna, the emitter stage of audion and the other end of negative feedback electric capacity, one end of negative feedback resistor and one end phase of the 3rd electric capacity
Even, the other end connection circuit positive pole of the 3rd electric capacity, it is connected the other end of negative feedback resistor and circuit;Described anode and electricity
Road positive pole is connected, and is connected battery cathode and circuit, also includes a controller and warning circuit, described controller and electricity of reporting to the police
Road, battery are connected, and described controller receives the numerical value of voltage, and to apply to control letter to warning circuit according to the numerical value received
Number.
Low-voltage FM circuit the most according to claim 1, it is characterised in that when cell voltage is less than 1 volt, described
Controller applies control signal to warning circuit.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610621063.8A CN106255001A (en) | 2016-08-02 | 2016-08-02 | A kind of low-voltage FM circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
CN201610621063.8A CN106255001A (en) | 2016-08-02 | 2016-08-02 | A kind of low-voltage FM circuit |
Publications (1)
Publication Number | Publication Date |
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CN106255001A true CN106255001A (en) | 2016-12-21 |
Family
ID=57606802
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
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CN201610621063.8A Pending CN106255001A (en) | 2016-08-02 | 2016-08-02 | A kind of low-voltage FM circuit |
Country Status (1)
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CN (1) | CN106255001A (en) |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020076951A (en) * | 2001-03-31 | 2002-10-11 | 주식회사 니오스 | Portable infrared transmitter and wireless ear phone |
CN201323655Y (en) * | 2008-10-21 | 2009-10-07 | 黄秀鸣 | Portable teaching megaphone |
CN202795652U (en) * | 2012-07-25 | 2013-03-13 | 北京东方海龙消防科技有限公司 | Wireless-voice talkback saving alarm |
CN202979276U (en) * | 2013-01-08 | 2013-06-05 | 李秉哲 | Low-voltage frequency modulation wireless microphone |
-
2016
- 2016-08-02 CN CN201610621063.8A patent/CN106255001A/en active Pending
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR20020076951A (en) * | 2001-03-31 | 2002-10-11 | 주식회사 니오스 | Portable infrared transmitter and wireless ear phone |
CN201323655Y (en) * | 2008-10-21 | 2009-10-07 | 黄秀鸣 | Portable teaching megaphone |
CN202795652U (en) * | 2012-07-25 | 2013-03-13 | 北京东方海龙消防科技有限公司 | Wireless-voice talkback saving alarm |
CN202979276U (en) * | 2013-01-08 | 2013-06-05 | 李秉哲 | Low-voltage frequency modulation wireless microphone |
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PB01 | Publication | ||
C10 | Entry into substantive examination | ||
SE01 | Entry into force of request for substantive examination | ||
RJ01 | Rejection of invention patent application after publication | ||
RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |