CN109874086B - Ear-placing connecting device - Google Patents
Ear-placing connecting device Download PDFInfo
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- CN109874086B CN109874086B CN201910243648.4A CN201910243648A CN109874086B CN 109874086 B CN109874086 B CN 109874086B CN 201910243648 A CN201910243648 A CN 201910243648A CN 109874086 B CN109874086 B CN 109874086B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
- Y02D30/00—Reducing energy consumption in communication networks
- Y02D30/70—Reducing energy consumption in communication networks in wireless communication networks
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Abstract
The invention relates to an ear amplifier connecting device, which amplifies signals through a first amplifying module and a second amplifying module, processes input signals, and is connected with an earphone through an operational amplifier module so as to avoid disturbing people in practicing an electric guitar and realize silent exercise; meanwhile, the operational amplifier module is connected with the Bluetooth module, and can be connected with other electronic devices in a wireless way through the Bluetooth module, so that the use is convenient; and the socket circuit is arranged, so that the device is directly connected with other equipment with a third party application program, and further can detect, correct or play the electric guitar.
Description
Technical Field
The invention relates to music equipment, in particular to an ear-play connecting device.
Background
When the electric guitar is used for practicing, if the electric guitar is connected with a power amplifier for practicing, the electric guitar has loud sound, and a more remote place needs to be found for practicing, so that people are seriously disturbed. Today, in which smart phones are popular, many application programs are developed for electric guitars, music of the electric guitar is corrected, tested and the like, and the electric guitar is not convenient to connect with the smart phones, and the connection effect is poor.
Furthermore, the existing connecting device is complex in circuit, and the transmission electric guitar signal is distorted, so that the training effect is poor.
Disclosure of Invention
The invention aims to overcome the defects of the prior art and provides an ear placement connecting device.
In order to achieve the above purpose, the present invention adopts the following technical scheme:
an ear placement connecting device comprises a shell, a circuit board and a power supply, wherein the circuit board and the power supply are arranged on the inner side of the shell; the circuit board carries a control circuit; the control circuit comprises a first amplifying module for amplifying an input audio signal, a tone potentiometer connected with the first amplifying module and used for adjusting tone, a second amplifying module arranged at the output end of the tone potentiometer and used for amplifying the signal, a volume potentiometer arranged at the signal output end of the second amplifying module and an operational amplifier module arranged at the output end of the volume potentiometer; the operation amplifier module is provided with a Bluetooth module.
The further technical scheme is as follows: the first amplifying module comprises a first operational amplifier U5A and a second operational amplifier U5B, and the models of the first operational amplifier U5A and the second operational amplifier U5B are TL062C; the non-inverting input end of the first operational amplifier U5A is connected with an audio signal, the output end of the first operational amplifier U5A is connected with the inverting input end of the first operational amplifier U through a capacitor C20, and a gain potentiometer P2 is connected in parallel with the capacitor C20; the adjusting end of the gain potentiometer P2 is connected with the output end of the first operational amplifier U5A, the first output end of the gain potentiometer P2 is connected with the inverting input end of the first operational amplifier U5A, and the second output end of the gain potentiometer P2 is connected with the inverting input end of the second operational amplifier U5B after being connected in series through a capacitor C18 and a resistor R25; the non-inverting input end of the second operational amplifier U5B is connected with an audio signal, and the output end is connected with the inverting input end after being connected in parallel through the capacitors C24 and R29; the output end of the second operational amplifier U5B is connected with the tone potentiometer P4 after being connected in series through the capacitors C25 and R30.
The further technical scheme is as follows: the input end of the tone potentiometer P4 is connected with the output end of the second operational amplifier U5B, the output end of the tone potentiometer P4 is connected with the second amplifying module after being connected in series through a capacitor C29 and a resistor R32, and the regulating end of the tone potentiometer P is grounded through the capacitor C32; wherein, the output end of tone potentiometer P4 is short-circuited with the regulating end.
The further technical scheme is as follows: the second amplifying module comprises a third operational amplifier U6A and a fourth operational amplifier U6B, and the models of the third operational amplifier U6A and the fourth operational amplifier U6B are TL062C; the non-inverting input end of the third operational amplifier U6A is respectively connected with the power supply and the output end of the tone potentiometer P4, the output end is connected with the fourth operational amplifier U6B through a resistor R31, and the inverting input end is connected with the output end through a resistor R24 and a capacitor C22; the inverting input circuit is connected with a plurality of audio processing circuits; the output end of the fourth operational amplifier U6B is connected with the volume potentiometer P5.
The further technical scheme is as follows: the audio processing circuit comprises a triode Q1; the base electrode of the triode Q1 is connected with the inverting input end of the third operational amplifier U6A through a capacitor C10, the collector electrode is connected with the power supply end, and the emitter electrode is grounded.
The further technical scheme is as follows: the non-inverting input end of the fourth operational amplifier U6B is connected with the output end of the third operational amplifier U6A, the inverting input end is connected with the output end of the third operational amplifier U6A through a capacitor C28, and the output end is connected with the inverting input end; the output end of the fourth operational amplifier U6B is connected with the volume potentiometer P5 after being connected in series through a capacitor C30 and a resistor R33; and the adjusting output end of the volume potentiometer P5 is connected with the operational amplifier module.
The further technical scheme is as follows: the operational amplifier module comprises an operational amplifier chip U7, and the model of the operational amplifier chip U7 is TDA1308; the terminal pins IN1 and IN2 of the operational amplifier chip U7 are respectively connected with the output end of the volume potentiometer P5, the terminal pins In1+ and In2+ are connected with the power supply end, and the terminal pins OUT1 and OUT2 are connected with the output end; the end pin OUT1 is connected with the output end of the volume potentiometer P5 after being connected in parallel through a resistor R40 and a capacitor C37; the terminal pin OUT2 is connected in parallel through a resistor R43 and a capacitor C45 and then connected with the output end of the volume potentiometer P5.
The further technical scheme is as follows: the terminal pins IN1-, IN 2-Bluetooth modules of the operational amplifier chip U7 are connected; the Bluetooth module comprises a Bluetooth chip U8, and the model of the Bluetooth chip U8 is WSBT 01A1; the terminal LOUT of the Bluetooth chip U8 is connected with the terminal IN 2-of the operational amplifier chip U7 after being connected IN series through a resistor R48, a capacitor C48 and a resistor R49; the terminal ROUT of the Bluetooth chip U8 is connected with the terminal IN 1-of the operational amplifier chip U7 after being connected IN series through a resistor R46, a capacitor C47 and a resistor R47.
The further technical scheme is as follows: also comprises a socket circuit; the socket circuit comprises a MOS tube Q5, and the model is MMBFJ201; the grid electrode of the MOS tube Q5 is connected with an audio input signal through a resistor R52 and a capacitor C49, the source electrode is connected with the socket, and the drain electrode is grounded; the socket interface is respectively connected with end pins OUT1 and OUT2 of the operational amplifier chip U7; the detection circuit comprises a MOS tube Q6 and a MOS tube Q7; the grid electrode of the MOS tube Q7 is connected with the socket interface, the drain electrode is grounded, and the source electrode is connected with the grid electrode of the MOS tube Q6; the drain electrode of the MOS tube Q6 is connected with the booster circuit, and the source electrode is connected with the power supply.
The further technical scheme is as follows: the power supply charging circuit is used for supplying power to the power supply, the detection circuit is used for detecting the power supply, and the protection circuit is used for protecting the power supply; the charging circuit comprises a charging chip U3, and the model of the charging chip U3 is EM78P301N-1; the detection circuit comprises a detection chip U2, the model of which is TP4057, and the detection chip U2 is connected with a USB interface; the protection circuit comprises an overload protection chip U4, and the model of the overload protection chip U4 is XB5353A.
Compared with the prior art, the invention has the beneficial effects that: the ear amplifier connecting device is connected with the electric guitar, amplifies signals through the first amplifying module and the second amplifying module, processes input signals, and is connected with the earphone through the operational amplifier module so as to prevent the electric guitar from disturbing the people when practicing, and realize silent practice; meanwhile, the operational amplifier module is connected with the Bluetooth module, and can be connected with other electronic devices in a wireless way through the Bluetooth module, so that the use is convenient; and the socket circuit is arranged, so that the device is directly connected with other equipment with a third party application program, and further can detect, correct or play the electric guitar.
The invention is further described below with reference to the drawings and specific embodiments.
Drawings
FIG. 1 is an exploded view of an ear mount attachment device of the present invention;
fig. 2 is a schematic circuit diagram of a first amplifying module, a second amplifying module, an operational amplifier module, etc. of the ear amplifier connecting device according to the present invention;
FIG. 3 is a schematic diagram of a detection circuit and a boost circuit of the ear amplifier connecting device of the invention;
FIG. 4 is a schematic diagram of a power charging circuit of an ear-pick-up connector according to the present invention;
FIG. 5 is a schematic diagram of a protection circuit of an ear-pick-up connection device according to the present invention;
fig. 6 is a schematic circuit diagram of a bluetooth module of the ear-pick-up connection device according to the present invention.
Detailed Description
In order to more fully understand the technical content of the present invention, the following technical solutions of the present invention will be further described and illustrated with reference to specific embodiments, but are not limited thereto.
Figures 1 to 6 illustrate drawings of embodiments of the present invention.
An ear-pick-up connector, as shown in fig. 1 to 6, comprises a housing 10, a circuit board 11 disposed inside the housing 10, and a power source 12. The circuit board 11 carries control circuitry. The control circuit comprises a first amplifying module 15 for amplifying an input audio signal, a tone potentiometer P4 connected with the first amplifying module 15 and used for adjusting tone, a second amplifying module 16 arranged at the output end of the tone potentiometer and used for amplifying the signal, a volume potentiometer P5 arranged at the signal output end of the second amplifying module 16 and an operational amplifier module 17 arranged at the output end of the volume potentiometer P5. The op-amp module 17 is provided with a bluetooth module 25. In this embodiment, the input of the audio signal is an electric guitar input, but is not limited to an electric guitar.
The housing 10 includes an upper housing 101 and a lower housing 102, and a mounting cavity is formed between the upper housing 101 and the lower housing 102 for mounting components such as a power source, a circuit board 11, and the like.
The input of the audio signal is provided with a plug 13 connected to the electric guitar for transmitting the electric guitar signal.
As shown in fig. 2, the first amplifying module 15 includes a first operational amplifier U5A and a second operational amplifier U5B, both of which are TL062C. The non-inverting input end of the first operational amplifier U5A is connected with an audio signal, the output end of the first operational amplifier U5A is connected with the inverting input end through a capacitor C20, and a gain potentiometer P2 is connected with the capacitor C20 in parallel. The adjusting end of the gain potentiometer P2 is connected with the output end of the first operational amplifier U5A, the first output end of the gain potentiometer P2 is connected with the inverting input end of the first operational amplifier U5A, and the second output end of the gain potentiometer P2 is connected with the inverting input end of the second operational amplifier U5B after being connected in series through a capacitor C18 and a resistor R25. The non-inverting input end of the second operational amplifier U5B is connected with a power supply, and the output end is connected with the inverting input end after being connected in parallel through the capacitors C24 and R29. The output end of the second operational amplifier U5B is connected with the tone potentiometer P4 after being connected in series through the capacitors C25 and R30.
Specifically, the non-inverting input terminal of the first operational amplifier U5A is connected to the bias voltage VB of the power supply through the resistor R28 to supply the power. The inverting input terminal of the first operational amplifier U5A is grounded through a resistor R23 and a capacitor C19.
The input end of the tone potentiometer P4 is connected with the output end of the second operational amplifier U5B, the output end of the tone potentiometer P is connected with the second amplifying module 16 after being connected in series through a capacitor C29 and a resistor R32, and the adjusting end of the tone potentiometer P is grounded through the capacitor C32. And, short circuit is connected between the regulation end and the output end of tone potentiometer P4.
The second amplifying module 16 includes a third operational amplifier U6A and a fourth operational amplifier U6B, both of which are TL062C. The non-inverting input end of the third operational amplifier U6A is respectively connected with the power supply and the output end of the tone potentiometer P4, the output end is connected with the fourth operational amplifier U6B through a resistor R31, and the inverting input end is connected with the output end after being connected in parallel through a resistor R24 and a capacitor C22; the inverting input circuit is connected with a plurality of audio processing circuits. The output end of the fourth operational amplifier U6B is connected with the volume potentiometer P5.
The output end of the third operational amplifier U6A is connected in series with the non-inverting input end of the fourth operational amplifier U6B through resistors R31 and R34, and the output end of the third operational amplifier U6A is connected in series with the inverting input end of the fourth operational amplifier U6B through resistor R31 and capacitor C28, so as to amplify the signal further.
The audio processing circuit includes a transistor Q1. The base electrode of the triode Q1 is connected with the inverting input end of the third operational amplifier U6A through a capacitor C10, the collector electrode is connected with the power supply end, and the emitter electrode is grounded. The audio processing circuit is used for filtering the music signal to reduce interference.
In this embodiment, the audio processing circuits are 4 groups.
The non-inverting input end of the fourth operational amplifier U6B is connected with the output end of the third operational amplifier U6A, the inverting input end is connected with the output end of the third operational amplifier U6A through a capacitor C28, and the output end is connected with the inverting input end; the output end of the fourth operational amplifier U6B is connected with the volume potentiometer P5 after being connected in series through the capacitor C30 and the resistor R33. The adjusting output end of the volume potentiometer P5 is connected with the operational amplifier module 17.
Specifically, the adjusting output end of the volume potentiometer P5 is connected in series with the operational amplifier module 17 through a resistor R37 and a capacitor C35.
The op-amp module 17 includes an op-amp chip U7, which is model number TDA1308. The terminal pins IN 1-IN 2-of the operational amplifier chip U7 are respectively connected with the output end of the volume potentiometer P5, wherein the terminal pin IN 1-is connected with the output end of the volume potentiometer P5; the terminal pins In1+, in2+ are connected with the power supply terminal, and the terminal pins OUT1 and OUT2 are connected with the output terminal. The terminal pin OUT1 is connected in parallel through a resistor R40 and a capacitor C37 and then connected with the output end of the volume potentiometer P5. The terminal pin OUT2 is connected in parallel through a resistor R43 and a capacitor C45 and then connected with the output end of the volume potentiometer P5. The output end of the operational amplifier module 17 is an earphone interface, and the music signal is amplified and processed and then output from the earphone interface.
In this embodiment, the music signal is an input signal of the electric guitar, and after being processed and amplified, the music signal is output through the earphone interface, so that the electric guitar is directly connected with the earphone, and disturbance to people is avoided.
As shown IN fig. 2 and 6, the pins IN1-, IN 2-bluetooth modules 25 of the op-amp chip U7 are connected. The bluetooth module 25 includes a bluetooth chip U8, which is of the type WTSBT01A1. The terminal LOUT of the Bluetooth chip U8 is connected with the terminal IN 2-of the operational amplifier chip U7 after being connected IN series through a resistor R48, a capacitor C48 and a resistor R49. The terminal ROUT of the Bluetooth chip U8 is connected with the terminal IN 1-of the operational amplifier chip U7 after being connected IN series through a resistor R46, a capacitor C47 and a resistor R47. The resistor R48 and the capacitor C48 are grounded through a resistor R51. The resistor R46 and the capacitor C47 are grounded through a resistor R550. The bluetooth module 25 can wirelessly transmit the output signal of the operational amplifier module 17, thereby increasing the convenience of the device.
A socket circuit 18 is also included and is provided with a socket 14 for plugging with other electronic devices. The socket circuit comprises a MOS tube Q5, and the model is MMBFJ201. The grid electrode of the MOS tube Q5 is connected with an audio input signal through a resistor R52 and a capacitor C49, the source electrode is connected with a socket, and the drain electrode is grounded. The socket interface is respectively connected with the terminal pins OUT1 and OUT2 of the operational amplifier chip U7. The source is connected to the gate through a resistor R53. The outlet circuit may be connected to a device with a third party application to transfer signals from the electric guitar to the device, enabling the application to detect, correct, etc. the electric guitar. After the guitar signal enters the device with the third party application program, the audio decoding program is used for decoding the electric guitar signal, and then the electric guitar signal is played.
As shown in fig. 3, the socket interface is further provided with a detection circuit 19. The detection circuit 19 includes a MOS transistor Q6 and a MOS transistor Q7. The grid electrode of the MOS tube Q7 is connected with the socket interface, the drain electrode is grounded, and the source electrode is connected with the grid electrode of the MOS tube Q6. The drain electrode of the MOS tube Q6 is connected with the booster circuit, and the source electrode is connected with the power supply. When the socket 14 is connected with other electronic devices, the detection circuit can detect that the operational amplifier module 17 is automatically turned off.
When the socket 14 is connected with other electronic devices, the detection circuit detects that the MOS tube Q6 is used as a switch, and is automatically disconnected, so that the operational amplifier module 17 stops working and no signal is output at the end of the connecting earphone.
As shown in fig. 4 and 5, the power supply charging circuit 23 for supplying power to the power supply, the detection circuit 22 for detecting the power supply, and the protection circuit 24 for protecting the power supply are further included. The charging circuit comprises a charging chip U3, and the model of the charging chip is EM78P301N-1; the detection circuit comprises a detection chip U2, the model of the detection chip U2 is TP4057, and the detection chip U2 is connected with a USB interface. The protection circuit includes an overload protection chip U4, which is model XB5353A.
As shown in fig. 3, the output end of the power supply is further provided with a booster circuit 21 for boosting the power supply voltage of 3.7V to 5V to supply power to the circuit. The boost circuit is connected with the drain electrode of the MOS tube Q6 through a coil L1, and the model of a boost chip U1 of the boost circuit is BL8530. The boosted output ends of the booster circuit are VB and VCC. VB of the booster circuit is used as a power supply end of the first operational amplifier U5A, the second operational amplifier U5B and the third operational amplifier U6A. The power supply of the audio processing circuit is connected with the output ends VB and VCC of the booster circuit.
In summary, the ear amplifier connecting device is connected with the electric guitar, amplifies signals through the first amplifying module and the second amplifying module, processes input signals, and is connected with the earphone through the operational amplifier module, so that the electric guitar is prevented from disturbing people when being practiced, and silent exercise is achieved; meanwhile, the operational amplifier module is connected with the Bluetooth module, and can be connected with other electronic devices in a wireless way through the Bluetooth module, so that the use is convenient; and the socket circuit is arranged, so that the device is directly connected with other equipment with a third party application program, and further can detect, correct or play the electric guitar.
The foregoing examples are provided to further illustrate the technical contents of the present invention for the convenience of the reader, but are not intended to limit the embodiments of the present invention thereto, and any technical extension or re-creation according to the present invention is protected by the present invention. The protection scope of the invention is subject to the claims.
Claims (5)
1. The ear placement connecting device is characterized by comprising a shell, a circuit board and a power supply, wherein the circuit board and the power supply are arranged on the inner side of the shell; the circuit board carries a control circuit; the control circuit comprises a first amplifying module for amplifying an input audio signal, a tone potentiometer connected with the first amplifying module and used for adjusting tone, a second amplifying module arranged at the output end of the tone potentiometer and used for amplifying the signal, a volume potentiometer arranged at the signal output end of the second amplifying module, and an operational amplifier module arranged at the output end of the volume potentiometer; the operational amplifier module is provided with a Bluetooth module, and the first amplifying module comprises a first operational amplifier U5A and a second operational amplifier U5B, and the models of the first operational amplifier U5A and the second operational amplifier U5B are TL062C; the non-inverting input end of the first operational amplifier U5A is connected with an audio signal, the output end of the first operational amplifier U5A is connected with the inverting input end of the first operational amplifier U through a capacitor C20, and a gain potentiometer P2 is connected in parallel with the capacitor C20; the adjusting end of the gain potentiometer P2 is connected with the output end of the first operational amplifier U5A, the first output end of the gain potentiometer P2 is connected with the inverting input end of the first operational amplifier U5A, and the second output end of the gain potentiometer P2 is connected with the inverting input end of the second operational amplifier U5B after being connected in series through a capacitor C18 and a resistor R25; the non-inverting input end of the second operational amplifier U5B is connected with an audio signal, and the output end is connected with the inverting input end after being connected in parallel through the capacitors C24 and R29; the output end of the second operational amplifier U5B is connected with the tone potentiometer P4 after being connected in series through the capacitors C25 and R30, the input end of the tone potentiometer P4 is connected with the output end of the second operational amplifier U5B, the output end of the tone potentiometer P is connected with the second amplifying module after being connected in series through the capacitor C29 and the resistor R32, and the regulating end of the tone potentiometer P is grounded through the capacitor C32; the output end of the tone potentiometer P4 is in short circuit with the adjusting end, and the second amplifying module comprises a third operational amplifier U6A and a fourth operational amplifier U6B, and the models of the third operational amplifier U6A and the fourth operational amplifier U6B are TL062C; the non-inverting input end of the third operational amplifier U6A is respectively connected with the power supply and the output end of the tone potentiometer P4, the output end is connected with the fourth operational amplifier U6B through a resistor R31, and the inverting input end is connected with the output end after being connected in parallel through a resistor R24 and a capacitor C22; the inverting input circuit is connected with a plurality of audio processing circuits; the output end of the fourth operational amplifier U6B is connected with a volume potentiometer P5, and the audio processing circuit comprises a triode Q1; the base electrode of the triode Q1 is connected with the inverting input end of the third operational amplifier U6A through a capacitor C10, the collector electrode is connected with the power supply end, the emitter electrode is grounded, the non-inverting input end of the fourth operational amplifier U6B is connected with the output end of the third operational amplifier U6A, the inverting input end is connected with the output end of the third operational amplifier U6A through a capacitor C28, and the output end is connected with the inverting input end; the output end of the fourth operational amplifier U6B is connected with the volume potentiometer P5 after being connected in series through a capacitor C30 and a resistor R33; and the adjusting output end of the volume potentiometer P5 is connected with the operational amplifier module.
2. The ear-put connection device according to claim 1, wherein the operational amplifier module comprises an operational amplifier chip U7, which is of the model TDA1308; the terminal pins IN1 and IN2 of the operational amplifier chip U7 are respectively connected with the output end of the volume potentiometer P5, the terminal pins In1+ and In2+ are connected with the power supply end, and the terminal pins OUT1 and OUT2 are connected with the output end; the end pin OUT1 is connected with the output end of the volume potentiometer P5 after being connected in parallel through a resistor R40 and a capacitor C37; the terminal pin OUT2 is connected in parallel through a resistor R43 and a capacitor C45 and then connected with the output end of the volume potentiometer P5.
3. The ear-pick-up connector of claim 2, wherein pins IN1-, IN 2-of said op-amp chip U7 are connected to a bluetooth module; the Bluetooth module comprises a Bluetooth chip U8, and the model of the Bluetooth chip U8 is WSBT 01A1; the terminal LOUT of the Bluetooth chip U8 is connected with the terminal IN 2-of the operational amplifier chip U7 after being connected IN series through a resistor R48, a capacitor C48 and a resistor R49; the terminal ROUT of the Bluetooth chip U8 is connected with the terminal IN 1-of the operational amplifier chip U7 after being connected IN series through a resistor R46, a capacitor C47 and a resistor R47.
4. An earpick-up connection device according to claim 3, further comprising a socket circuit; the socket circuit comprises a MOS tube Q5, and the model is MMBFJ201; the grid electrode of the MOS tube Q5 is connected with an audio input signal through a resistor R52 and a capacitor C49, the source electrode is connected with the socket, and the drain electrode is grounded; the socket is respectively connected with end pins OUT1 and OUT2 of the operational amplifier chip U7; the socket circuit further includes: the monitoring circuit comprises a MOS tube Q6 and a MOS tube Q7; the grid electrode of the MOS tube Q7 is connected with the socket interface, the drain electrode is grounded, and the source electrode is connected with the grid electrode of the MOS tube Q6; the drain electrode of the MOS tube Q6 is connected with the booster circuit, and the source electrode is connected with the power supply.
5. The ear pick-up device of claim 4, further comprising a power supply charging circuit for powering a power supply, a detection circuit for detecting the power supply, and a protection circuit for protecting the power supply; the charging circuit comprises a charging chip U2, and the model of the charging chip U is TP4057; the detection circuit comprises a detection chip U3, the model of which is EM78P301N-1, and the detection chip U3 is connected with a USB interface; the protection circuit comprises an overload protection chip U4, and the model of the overload protection chip U4 is XB5353A.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243648.4A CN109874086B (en) | 2019-03-28 | 2019-03-28 | Ear-placing connecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910243648.4A CN109874086B (en) | 2019-03-28 | 2019-03-28 | Ear-placing connecting device |
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|---|---|
| CN109874086A CN109874086A (en) | 2019-06-11 |
| CN109874086B true CN109874086B (en) | 2023-11-10 |
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| CN201910243648.4A Active CN109874086B (en) | 2019-03-28 | 2019-03-28 | Ear-placing connecting device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109874086B (en) * | 2019-03-28 | 2023-11-10 | 深圳市威拓思音乐有限公司 | Ear-placing connecting device |
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| CN109874086A (en) | 2019-06-11 |
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