CN215773548U - Wireless bone conduction microphone circuit - Google Patents
Wireless bone conduction microphone circuit Download PDFInfo
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- CN215773548U CN215773548U CN202122074851.9U CN202122074851U CN215773548U CN 215773548 U CN215773548 U CN 215773548U CN 202122074851 U CN202122074851 U CN 202122074851U CN 215773548 U CN215773548 U CN 215773548U
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Abstract
The utility model provides a wireless bone conduction microphone circuit which comprises a main control chip, an audio frequency transceiving unit, a power supply unit and an indicating unit, wherein the power supply unit is respectively connected with the main control chip, the audio frequency transceiving unit and the indicating unit; the main control chip is provided with a control output end connected with the audio transceiving unit and an indicating end connected with the indicating unit; the input end of the audio transceiving unit is connected with the bone conduction microphone, and outputs audio signals outwards through a wireless circuit of the audio transceiving unit. The beneficial effects are that: the application amplifies and outputs the vibration signal generated by the bone when speaking through the induction and then the vibration signal is output to the loudspeaker through the power amplifier to output audio, and the surrounding environmental noise is filtered. And the audio transceiving unit can perform wireless audio transmission through the wireless circuit.
Description
Technical Field
The utility model relates to the technical field of charging, in particular to a wireless bone conduction microphone circuit.
Background
The technology is innovative, the technology is advanced, and a wired bone conduction microphone loudspeaker in the current market is not available, and is all of a capacitor column type, a silicon microphone, a moving coil type and the like. When the moving-coil microphone, the electret microphone and the silicon microphone are used, ambient noise can be picked up when the sound heads are used and transmitted to the other party to be heard, and the experience of consumers is influenced to a great extent.
SUMMERY OF THE UTILITY MODEL
The present invention overcomes the above-mentioned drawbacks of the prior art and provides a wireless bone conduction microphone circuit.
A wireless bone conduction microphone circuit comprises a main control chip, an audio transceiving unit, a power supply unit and an indication unit,
the power supply unit is respectively connected with the main control chip, the audio transceiving unit and the indicating unit; the main control chip is provided with a control output end connected with the audio transceiving unit and an indicating end connected with the indicating unit; the input end of the audio transceiving unit is connected with the bone conduction microphone, and outputs audio signals outwards through a wireless circuit of the audio transceiving unit.
Optionally, the power supply unit includes a charging connector, a charging chip, a power supply battery, a switching circuit, and a linear voltage regulator circuit,
the charging connector is connected with a positive power source end of the power supply battery through a charging chip, and a positive power source of the power supply battery is also connected with the switch circuit and the linear voltage stabilizing circuit; the switch circuit is connected with the main control chip, and the linear voltage stabilizing circuit is provided with a first power supply end and a second power supply end which respectively output a first power supply and a second power supply.
Optionally, the switch circuit includes a first switch, a first triode, a first resistor, and a first voltage regulator tube, one end of the first switch is connected to the positive power source end of the power supply battery, and the other end of the first switch is grounded through the first voltage regulator tube and connected to the base of the first triode through the first resistor; and the collector of the first triode is connected with the switch end of the main control chip, and the emitter of the first triode is grounded.
Optionally, the linear voltage stabilizing circuit includes a voltage stabilizing chip and a first voltage regulating circuit;
the input end of the voltage stabilizing chip is connected with the positive power source end of the power supply battery, the output end of the voltage stabilizing chip is a first power source end for outputting a first power source, and the first power source end is further connected with a first voltage regulating circuit.
Optionally, the first voltage regulating circuit includes a second triode, a second resistor, a first capacitor, a first inductor, and a third resistor; the base electrode of the second triode is grounded through a first capacitor and connected with a first power supply end through a second resistor, the collector electrode of the second triode is connected with the first power supply end, the emitter electrode of the second triode is connected in series through a first inductor and a third resistor sequentially, and the free end of the third resistor is the second power supply end for outputting a second power supply; and at least one capacitor is connected to two ends of the first inductor.
Optionally, the audio transceiver unit further includes an audio input circuit and a transmitting chip, the transmitting chip is provided with an audio receiving end, an audio transmitting end, a control input end and a first power input end, the audio receiving end is connected to the audio input circuit, the audio transmitting end is connected to the wireless circuit, the control input end is connected to the control output end, and the first power input end is connected to the first power end.
Optionally, the audio input circuit includes an audio connector, the audio connector is provided with a first connection end and a second connection end, the first connection end is connected to the audio receiving end through a filter capacitor, and the second connection end is grounded; the first connecting end is further connected with the second power end, and the first connecting end is further connected with at least one filter capacitor.
Optionally, the wireless circuitry comprises a plurality of filter capacitors, a plurality of filter inductors, and an antenna; and the plurality of filter capacitors and filter inductors are connected between the audio transmitting end and the antenna to form a filter circuit.
Optionally, the indication unit includes three indication lamp circuits, and the indication lamp circuits respectively display RGB three-color lamps.
Optionally, the indicating lamp circuit includes a schottky diode, a light emitting diode, a third triode, a fourth resistor, and a fifth resistor, the first input end of the schottky diode is connected to the first power supply end, the second input end of the schottky diode is connected to the power input end of the charging chip, the output end of the schottky diode is connected to the collector of the third triode sequentially through the light emitting diode and the fourth resistor, the base of the third triode is connected to the indicating end through the fifth resistor, and the emitter is grounded.
The beneficial effects are that: the application amplifies and outputs the vibration signal generated by the bone when speaking through the induction and then the vibration signal is output to the loudspeaker through the power amplifier to output audio, and the surrounding environmental noise is filtered. And the audio transceiving unit can perform wireless audio transmission through the wireless circuit.
Drawings
Fig. 1 is a schematic diagram of a main control chip and an audio transceiving unit circuit according to an embodiment of the present invention.
Fig. 2 is a schematic diagram of a power supply unit and an indication unit according to an embodiment of the utility model.
Detailed Description
The drawings are for illustrative purposes only and are not to be construed as limiting the patent; for the purpose of better illustrating the embodiments, certain features of the drawings may be omitted, enlarged or reduced, and do not represent the size of an actual product; it will be understood by those skilled in the art that certain well-known structures in the drawings and descriptions thereof may be omitted. The positional relationships depicted in the drawings are for illustrative purposes only and are not to be construed as limiting the present patent.
The same or similar reference numerals in the drawings of the embodiments of the present invention correspond to the same or similar components; in the description of the present invention, it should be understood that if there are terms such as "upper", "lower", "left", "right", "long", "short", etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the drawings, it is only for convenience of description and simplicity of description, but does not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and therefore, the terms describing the positional relationships in the drawings are only used for illustrative purposes and are not to be construed as limitations of the present patent, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.
The technical scheme of the utility model is further described in detail by the following specific embodiments in combination with the attached drawings:
in the embodiment shown in fig. 1-2, the present application discloses a wireless bone conduction microphone circuit, which includes a main control chip, an audio transceiving unit, a power supply unit, and an indication unit, wherein the power supply unit is connected to the main control chip, the audio transceiving unit, and the indication unit, respectively; the main control chip U1 is provided with a control output end connected with the audio transceiving unit and an indicating end connected with the indicating unit; the input end of the audio transceiving unit is connected with the bone conduction microphone, and outputs an audio signal outwards through the wireless circuit 3 of the audio transceiving unit. In the present embodiment, the audio transceiver unit is connected to the bone conduction microphone, and outputs an audio signal to the outside through the radio circuit 3. The application amplifies and outputs the vibration signal generated by the bone when speaking through the induction and then the vibration signal is output to the loudspeaker through the power amplifier to output audio, and the surrounding environmental noise is filtered. And the audio transceiving unit can perform wireless transmission of audio through the wireless circuit 3.
In some embodiments, the power supply unit includes a charging connector J1, a charging chip U3, a power supply battery BAT, a switch circuit 1, and a linear voltage stabilizing circuit, the charging connector J1 is connected to a positive power supply terminal of the power supply battery BAT through the charging chip U3, and the positive power supply of the power supply battery BAT is further connected to the switch circuit 1 and the linear voltage stabilizing circuit; the switch circuit 1 is connected with the main control chip U1, and the linear voltage stabilizing circuit is provided with a first power supply terminal VCC1 and a second power supply terminal VCC2 for respectively outputting a first power supply and a second power supply. In this embodiment, the charging connector J1 may be a charging interface of any one of TYPE-C, USB and 6P, SMT, and the charging interface is connected to an external power supply and then supplies power to the battery BAT through the charging chip U3; the charging chip U3 can be a charging chip U3 with model number TP4066, the positive power source terminal of the power supply battery BAT is further connected with the switch circuit 1 and the linear voltage stabilizing circuit respectively, the on-off of the circuit is controlled through the switch circuit 1, and a stable power supply is output through the linear tail tooth circuit. The main control chip can be a chip with the model number N76E003AQ 20.
In some embodiments, the switch circuit 1 includes a first switch K1, a first transistor Q1, a first resistor R1, and a first voltage regulator tube D3, one end of the first switch K1 is connected to a positive power supply terminal of the power supply battery BAT, and the other end of the first switch K1 is grounded through a first voltage regulator tube D3 and connected to a base of the first transistor Q1 through a first resistor R1; the collector of the first triode Q1 is connected to the switch terminal STANDBY of the main control chip U1, and the emitter is grounded. The switch circuit 1 of this application, through pressing first voltage, give main control chip U1 transmission switching signal through first triode Q1, carry out the on-off control of whole circuit. The first switch K1 may be a switch with model number TS18DC 35B.
In some embodiments, the linear voltage regulating circuit comprises a voltage regulating chip U4, a first voltage regulating circuit 2; the input end of the voltage stabilizing chip U4 is connected with the positive power supply end of the power supply battery BAT, the output end of the voltage stabilizing chip U4 is a first power supply end VCC1 for outputting a first power supply, and the first power supply end VCC1 is further connected with a first voltage regulating circuit 2. The first voltage regulating circuit 2 comprises a second triode Q2, a second resistor R2, a first capacitor C1, a first inductor L1 and a third resistor R3; the base of the second triode Q2 is grounded through a first capacitor C1 and connected with a first power supply terminal VCC1 through a second resistor R2, the collector is connected with the first power supply terminal VCC1, the emitter is connected in series through a first inductor L1 and a third resistor R3 in sequence, and the free end of the third resistor R3 is the second power supply terminal VCC2 for outputting a second power supply; at least one capacitor is also connected across the first inductor L1. In this embodiment, the voltage regulation chip U4 of the present application may be a voltage regulation chip U4 with a model of XC62FP3302MR, and a filter capacitor and a voltage regulation resistor are connected to an input and an output of the voltage regulation chip U4; the output end of the voltage stabilizing chip U4 outputs a first power supply for supplying power to the main control chip U1 and the transmitting chip. The voltage stabilizing chip U4 outputs a second power supply through a second diode for supplying power to the microphone.
In some embodiments, the audio transceiving unit further includes an audio input circuit 4, and a transmitting chip, the transmitting chip is provided with an audio receiving end MIC _ INP, an audio receiving end MIC _ INN, an audio transmitting end PA _ OUTN, an audio transmitting end PA _ OUTP, a control input SCL, a control input SDA, and a first power input end, the audio receiving end MIC _ INP, the audio receiving end MIC _ INN are connected to the audio input circuit, the audio transmitting end PA _ OUTN, the audio transmitting end PA _ OUTP are connected to the wireless circuit 3, the control input SCL, the control input SDA are connected to the control output end, and the first power input end is connected to the first power supply end VCC 1. In the present embodiment, the audio input circuit is connected to the bone conduction microphone, and the wireless circuit 3 is configured to transmit the audio signal of the transmitting chip after harmonic suppression and impedance matching. Wherein, the emitting chip can be a chip with model KT 0646M. The transmitting chip is also connected with an oscillating circuit, a filter circuit and the like.
In some embodiments, the audio input circuit 4 includes an audio connector MIC _4MM, the audio connector MIC _4MM is provided with a first connection end and a second connection end, the first connection end is connected with the audio receiving end MIC _ INP and the audio receiving end MIC _ INN through a filter capacitor, and the second connection end is grounded; the first connection terminal is further connected to a second power supply terminal VCC2, and the first connection terminal is further connected to at least one filter capacitor. In this embodiment, the audio input circuit 4 is connected to the bone conduction microphone through an audio connector MIC _4MM, which may be a MIC _4MM connector, and a first connection end of the connector is respectively connected to the second power source terminal VCC2, the audio receiving terminal MIC _ INP, and the audio receiving terminal MIC _ INN, for obtaining an audio signal of the bone conduction microphone.
In some embodiments, the wireless circuit 3 includes a plurality of filter capacitors, a plurality of filter inductors, and an antenna ANT; the plurality of filter capacitors and the filter inductors are connected among the audio transmitting end PA _ OUTN, the audio transmitting end PA _ OUTP and the antenna ANT to form a filter circuit. In this embodiment, the filter capacitors and the filter inductors may be a filter, and the filter may effectively filter a frequency point of a specific frequency in the power line or frequencies other than the frequency point to obtain a power signal of the specific frequency or eliminate the power signal of the specific frequency. And a specific circuit diagram can be seen in fig. 1.
In some embodiments, the indication unit 5 comprises three indicator light circuits, which display RGB three-color lights, respectively. The indicating lamp circuit comprises a Schottky diode D1, a light emitting diode D2, a third triode Q3, a fourth resistor R4 and a fifth resistor R5, wherein a first input end of the Schottky diode D1 is connected with a first power supply end VCC1, a second input end of the Schottky diode D1 is connected with a power supply input end of a charging chip U3, an output end of the Schottky diode D1 is connected with a collector electrode of the third triode Q3 through the light emitting diode D2 and the fourth resistor R4 in sequence, a base electrode of the third triode Q3 is connected with an indicating end GREEN _ LED or an indicating end REN _ LED or an indicating end BLUE _ LED through the fifth resistor R5, and an emitter electrode of the Schottky diode D1, the light emitting diode D2, the third triode Q3 is connected with the indicating end BLUE _ LED or the indicating end BLUE _ LED, and the emitter electrode of the Schottky diode is grounded. In this embodiment, the indicating unit 5 of the present application performs a circuit of the light emitting diode D2 by receiving an indicating signal of the main control chip U1, wherein the three indicating lamp circuits are respectively connected to the three indicating terminals GREEN _ LED, REN _ LED and BLUE _ LED of the main control circuit, so as to obtain a signal, and turn on the light emitting diode D2 by turning on the third triode Q3. The schottky diode D1 may be a diode of BAT54 CTB.
It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.
Claims (10)
1. A wireless bone conduction microphone circuit is characterized by comprising a main control chip, an audio transceiving unit, a power supply unit and an indicating unit,
the power supply unit is respectively connected with the main control chip, the audio transceiving unit and the indicating unit; the main control chip is provided with a control output end connected with the audio transceiving unit and an indicating end connected with the indicating unit; the input end of the audio transceiving unit is connected with the bone conduction microphone, and outputs audio signals outwards through a wireless circuit of the audio transceiving unit.
2. The wireless bone conduction microphone circuit of claim 1, wherein the power supply unit comprises a charging connector, a charging chip, a power supply battery, a switch circuit, and a linear voltage regulator circuit,
the charging connector is connected with a positive power source end of the power supply battery through a charging chip, and a positive power source of the power supply battery is also connected with the switch circuit and the linear voltage stabilizing circuit; the switch circuit is connected with the main control chip, and the linear voltage stabilizing circuit is provided with a first power supply end and a second power supply end which respectively output a first power supply and a second power supply.
3. The wireless bone conduction microphone circuit according to claim 2, wherein the switch circuit comprises a first switch, a first triode, a first resistor and a first voltage regulator tube, one end of the first switch is connected with a positive power supply end of the power supply battery, and the other end of the first switch is grounded through the first voltage regulator tube and connected with a base electrode of the first triode through the first resistor respectively; and the collector of the first triode is connected with the switch end of the main control chip, and the emitter of the first triode is grounded.
4. The wireless bone conduction microphone circuit of claim 2, wherein the linear voltage regulator circuit comprises a voltage regulator chip, a first voltage regulator circuit;
the input end of the voltage stabilizing chip is connected with the positive power source end of the power supply battery, the output end of the voltage stabilizing chip is a first power source end for outputting a first power source, and the first power source end is further connected with a first voltage regulating circuit.
5. The wireless bone conduction microphone circuit according to claim 4, wherein the first voltage regulating circuit comprises a second triode, a second resistor, a first capacitor, a first inductor, and a third resistor; the base electrode of the second triode is grounded through a first capacitor and connected with a first power supply end through a second resistor, the collector electrode of the second triode is connected with the first power supply end, the emitter electrode of the second triode is connected in series through a first inductor and a third resistor sequentially, and the free end of the third resistor is the second power supply end for outputting a second power supply; and at least one capacitor is connected to two ends of the first inductor.
6. The wireless bone conduction microphone circuit according to claim 2, wherein the audio transceiving unit further comprises an audio input circuit and a transmitting chip, the transmitting chip is provided with an audio receiving terminal, an audio transmitting terminal, a control input terminal and a first power input terminal, the audio receiving terminal is connected to the audio input circuit, the audio transmitting terminal is connected to the wireless circuit, the control input terminal is connected to the control output terminal, and the first power input terminal is connected to the first power terminal.
7. The wireless bone conduction microphone circuit according to claim 6, wherein the audio input circuit comprises an audio connector, the audio connector is provided with a first connection end and a second connection end, the first connection end is connected with the audio receiving end through a filter capacitor, and the second connection end is grounded; the first connecting end is further connected with the second power end, and the first connecting end is further connected with at least one filter capacitor.
8. The wireless bone conduction microphone circuit according to claim 6, wherein the wireless circuit comprises a plurality of filter capacitors, a plurality of filter inductors, and an antenna; and the plurality of filter capacitors and filter inductors are connected between the audio transmitting end and the antenna to form a filter circuit.
9. The wireless bone conduction microphone circuit according to claim 2, wherein the indication unit comprises three indication lamp circuits, and the indication lamp circuits respectively display RGB three-color lamps.
10. The wireless bone conduction microphone circuit according to claim 9, wherein the indicating lamp circuit comprises a schottky diode, a light emitting diode, a third triode, a fourth resistor and a fifth resistor, wherein a first input end of the schottky diode is connected to the first power supply end, a second input end of the schottky diode is connected to the power supply input end of the charging chip, an output end of the schottky diode is connected to a collector electrode of the third triode sequentially through the light emitting diode and the fourth resistor, a base electrode of the third triode is connected to the indicating end through the fifth resistor, and an emitter electrode of the third triode is grounded.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074851.9U CN215773548U (en) | 2021-08-30 | 2021-08-30 | Wireless bone conduction microphone circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122074851.9U CN215773548U (en) | 2021-08-30 | 2021-08-30 | Wireless bone conduction microphone circuit |
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| Publication Number | Publication Date |
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| CN215773548U true CN215773548U (en) | 2022-02-08 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202122074851.9U Active CN215773548U (en) | 2021-08-30 | 2021-08-30 | Wireless bone conduction microphone circuit |
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| CN (1) | CN215773548U (en) |
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2021
- 2021-08-30 CN CN202122074851.9U patent/CN215773548U/en active Active
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