CN106255006A - Low-voltage FM circuit is used in a kind of Karaoke - Google Patents
Low-voltage FM circuit is used in a kind of Karaoke Download PDFInfo
- Publication number
- CN106255006A CN106255006A CN201610621024.8A CN201610621024A CN106255006A CN 106255006 A CN106255006 A CN 106255006A CN 201610621024 A CN201610621024 A CN 201610621024A CN 106255006 A CN106255006 A CN 106255006A
- 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
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Classifications
-
- 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
- H04R3/04—Circuits for transducers, loudspeakers or microphones for correcting frequency response
-
- 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
- H04R2430/20—Processing of the output signals of the acoustic transducers of an array for obtaining a desired directivity characteristic
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- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
Abstract
The present invention provides a kind of Karaoke 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, low-voltage FM circuit is used in more specifically to one Karaoke.
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 Karaoke low-voltage FM circuit.
The technical scheme is that a kind of Karaoke low-voltage FM circuit, including battery, acoustical signal input electricity
Road, audion biasing circuit, oscillating circuit and high-frequency signal radiating circuit, described acoustical signal input circuit is talked about by electret
Cylinder, the first resistance, the first electrochemical capacitor composition, one end of output termination first resistance of Electret condenser microphone and the first electrochemical capacitor
Negative pole, be connected the metal shell of Electret condenser microphone and circuit, the other end connection circuit positive pole of the first resistance, the first electrolysis electricity
The positive pole held connects the base stage of audion；Described audion biasing circuit is made up of audion and the second resistance, the base stage of audion
Connect one end of the second resistance, the other end connection circuit positive pole of the second 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, the colelctor electrode of audion and one end of higher-order of oscillation coil, one end of the 5th electric capacity, negative feedback electric capacity
One end of one end and coupling 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
Antenna is penetrated in the other end sending and receiving closing electric capacity, the emitter stage of audion and the other end of negative feedback electric capacity, one end of negative feedback resistor
It is connected with one end of the 3rd electric capacity, the other end connection circuit positive pole of the 3rd electric capacity, the other end of negative feedback resistor and circuit ground phase
Even；Described anode is connected with circuit anode, is connected battery cathode and circuit, also includes a controller and warning circuit,
Described controller is connected with warning circuit, battery, described controller receive voltage numerical value, and according to receive numerical value come to
Warning circuit applies control signal；Described controller is connected with described high-frequency signal radiating circuit, and described controller is also with outward
Player be connected.
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:
Low-voltage FM circuit is used in a kind of Karaoke of the present invention, inclined including battery, acoustical signal input circuit, audion
Circuits, oscillating circuit and high-frequency signal radiating circuit, described acoustical signal input circuit by Electret condenser microphone, the first resistance,
First electrochemical capacitor composition, one end of output termination first resistance of Electret condenser microphone and the negative pole of the first electrochemical capacitor, electret
Being connected, the other end connection circuit positive pole of the first resistance, the positive pole of the first electrochemical capacitor connects the metal shell of body microphone and circuit
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 resistance
One end, the other end connection circuit positive pole of the second resistance；Described oscillating circuit and high-frequency signal radiating circuit are by audion, high frequency
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 antenna
Composition, one end, one end of the 5th electric capacity, one end of negative feedback electric capacity of the colelctor electrode of audion and higher-order of oscillation coil and couple
One end of 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, couples the another of electric capacity
Antenna is penetrated in one 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 electric capacity
One end be connected, the other end connection circuit positive pole of the 3rd electric capacity, be connected the other end of negative feedback resistor and circuit；Described battery
Positive pole is connected with circuit anode, is connected battery cathode and circuit, also includes a controller and warning circuit, described controller with
Warning circuit, battery are connected, and described controller receives the numerical value of voltage, and to apply to warning circuit according to the numerical value received
Control signal；Described controller is connected with described high-frequency signal radiating circuit, described controller also with external player phase
Connect.
Preferably, when cell voltage is less than 0.8 volt, described controller applies control signal to warning circuit.More excellent
Ground, when cell 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. low-voltage FM circuit is used in a Karaoke, 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 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；Described controller is connected with described high-frequency signal radiating circuit, described controller also with external player
It is connected.
Karaoke low-voltage FM circuit the most according to claim 1, it is characterised in that at cell voltage less than 1 volt
Time special, described controller applies control signal to warning circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621024.8A CN106255006A (en) | 2016-08-02 | 2016-08-02 | Low-voltage FM circuit is used in a kind of Karaoke |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610621024.8A CN106255006A (en) | 2016-08-02 | 2016-08-02 | Low-voltage FM circuit is used in a kind of Karaoke |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106255006A true CN106255006A (en) | 2016-12-21 |
Family
ID=57605749
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610621024.8A Pending CN106255006A (en) | 2016-08-02 | 2016-08-02 | Low-voltage FM circuit is used in a kind of Karaoke |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106255006A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398591A (en) * | 2018-05-14 | 2018-08-14 | 河北亚润电力器具有限公司 | All-loop self-inspection electroscope |
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 CN201610621024.8A patent/CN106255006A/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 |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108398591A (en) * | 2018-05-14 | 2018-08-14 | 河北亚润电力器具有限公司 | All-loop self-inspection electroscope |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20161221 |
|
| RJ01 | Rejection of invention patent application after publication |