CN106255001A - A kind of low-voltage FM circuit - Google Patents

A kind of low-voltage FM circuit Download PDF

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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
Authority
CN
China
Prior art keywords
circuit
electric capacity
audion
resistance
voltage
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.)
Pending
Application number
CN201610621063.8A
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Chinese (zh)
Inventor
熊昆明
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Beihai Ming Jie Technology Co Ltd
Original Assignee
Beihai Ming Jie Technology Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Beihai Ming Jie Technology Co Ltd filed Critical Beihai Ming Jie Technology Co Ltd
Priority to CN201610621063.8A priority Critical patent/CN106255001A/en
Publication of CN106255001A publication Critical patent/CN106255001A/en
Pending legal-status Critical Current

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Classifications

    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00Circuits for transducers, loudspeakers or microphones
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04RLOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00Signal 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

A kind of low-voltage FM circuit
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.
CN201610621063.8A 2016-08-02 2016-08-02 A kind of low-voltage FM circuit Pending CN106255001A (en)

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
CN106255001A true CN106255001A (en) 2016-12-21

Family

ID=57606802

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201610621063.8A Pending CN106255001A (en) 2016-08-02 2016-08-02 A kind of low-voltage FM circuit

Country Status (1)

Country Link
CN (1) CN106255001A (en)

Citations (4)

* Cited by examiner, † Cited by third party
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

Patent Citations (4)

* Cited by examiner, † Cited by third party
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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RJ01 Rejection of invention patent application after publication
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Application publication date: 20161221