CN219420983U - Wireless earphone supporting wired input - Google Patents

Wireless earphone supporting wired input Download PDF

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Publication number
CN219420983U
CN219420983U CN202223371138.1U CN202223371138U CN219420983U CN 219420983 U CN219420983 U CN 219420983U CN 202223371138 U CN202223371138 U CN 202223371138U CN 219420983 U CN219420983 U CN 219420983U
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China
Prior art keywords
module
control module
earphone
audio
audio input
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CN202223371138.1U
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Chinese (zh)
Inventor
谢坤秀
谢承霖
颜卓诚
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Shenzhen Badasheng Electronics Co ltd
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Shenzhen Badasheng Electronics Co ltd
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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 utility model relates to a wireless earphone supporting wired input, which belongs to the technical field of earphone equipment and comprises an earphone interface module, a wireless earphone module, a power control module, an audio output module, an audio input module and an audio input control module; the wireless earphone module is used for being connected with an audio output module and an audio input module of the wireless earphone; the earphone interface module is used for connecting terminal equipment of a user and the wireless earphone module and outputting an access signal; the audio input control module is used for responding to the access signal, controlling the conduction of the audio input module of the wireless earphone and outputting an audio input conduction signal; the power supply control module is used for responding to the access signal and the audio input conduction signal, supplying power and controlling the conduction of the audio output module. The utility model has the effect of improving the user experience.

Description

Wireless earphone supporting wired input
Technical Field
The utility model relates to the technical field of earphone equipment, in particular to a wireless earphone supporting wired input.
Background
The Bluetooth and wireless earphone audio signals are output in a differential mode, when the signals are interfered, the differential output is influenced at the same time, but the voltage difference change after the interference is received is not large, so that the anti-interference performance is better. Some existing wireless headsets (hereinafter referred to as wireless headsets) are connected with a loudspeaker through a differential output signal, and a microphone of the wireless headset cannot be shared during wired input, so that the wireless headset has limited functions when used as a wired headset.
The inventors consider that: in the related art, there are problems that wireless earphone used by both wired and wireless uses affects the use experience because wireless earphone microphone cannot be shared for talking or recording.
Disclosure of Invention
In order to improve the use experience, the utility model provides a wireless earphone supporting wired input.
The wireless earphone supporting wired input provided by the utility model adopts the following technical scheme:
a wireless earphone supporting wired input comprises an earphone interface module, a wireless earphone module, a power control module, an audio output module, an audio input module and an audio input control module; the wireless earphone module is used for being connected with an audio output module and an audio input module of the wireless earphone; the earphone interface module is used for connecting terminal equipment of a user and the wireless earphone module and outputting an access signal; the audio input control module is connected with the earphone interface module, the power supply control module and the wireless earphone module and is used for responding to the access signal, controlling the conduction of the audio input module of the wireless earphone and outputting an audio input conduction signal; the power supply control module is connected with the earphone interface module and the wireless earphone module and is used for responding to the access signal and the audio input conduction signal, supplying power and controlling the conduction of the audio output module.
The wireless earphone module comprises a power input end V+, an audio differential output right channel HPR, an audio differential output left channel HPL, a public end VCOMO, a microphone input end MIC+ and an earphone ground end GND, wherein the power input end V+ is connected with the power control module, the audio differential output left channel HPL and the audio differential output right channel HPR are both connected with the audio output module, the public end VCOMO is connected with the audio input control module, and the audio input module is connected with the microphone input end MIC+ and the earphone ground end GND.
The audio input control module comprises an NPN triode V, a first Nmos tube Q1 and a bias resistor R1, wherein the grid electrode of the first Nmos tube Q1 is connected to the collector electrode of the triode V, the drain electrode of the first Nmos tube Q1 is connected to the common end VCOMO, the source electrode of the first Nmos tube Q1 is grounded, one end of the bias resistor R1 is connected to the source electrode of the first Nmos tube Q1, and the other end of the bias resistor R1 is connected to the grid electrode of the first Nmos tube Q1; the audio input control module is connected with the power supply control module through the collector electrode of the triode V.
By adopting the technical scheme, when the wireless earphone is connected to the terminal equipment of the user in a wired way, the earphone interface module responds and outputs an access signal, and the audio input control module responds to the access signal, controls the conduction of the audio input module of the wireless earphone and outputs an audio input conduction signal; the power supply control module responds to the access signal and the audio input conduction signal, controls the conduction of the audio output module of the wireless earphone, and performs wired power supply; at this time, after the wired external terminal equipment is connected, the audio input and output of the wireless earphone and the power supply circuit are all connected, so that the purpose that the wired circuit shares the wireless earphone microphone is achieved, and the use experience effect is improved.
When the wireless earphone is connected to the terminal equipment of the user in a wired way, the earphone interface module responds and outputs an access signal, the audio input control module responds to the access signal and outputs an audio input conduction signal, and meanwhile, the audio input module is conducted through the public terminal VCOMO; the power supply control module responds to the access signal and the audio input conduction signal, supplies power to the audio input module and the audio output module through the power supply input end V+ and conducts all the audio input module and the audio output module; the audio frequency difference output left channel HPL and the audio frequency difference output right channel HPR are connected to the audio frequency output module and are respectively used for conducting the left loudspeaker and the right loudspeaker of the wireless earphone; the microphone input end MIC+ and the earphone ground end GND are both connected to the audio input module and used for conducting the microphone of the wireless earphone.
When the wireless earphone is used in a wireless mode, the normally closed LO end of the left sound channel is communicated with the L end of the left sound channel; when the earphone interface module is connected with the terminal equipment of the user in a wired way, the contact between the left channel switch LO end and the left channel end L is disconnected, and the contact between the right channel switch RO end and the right channel end R is also disconnected, so that the earphone interface module generates an access signal; the audio input control module and the power supply control module receive and respond to the access signal, so that the switching between the wireless mode and the wired mode is completed.
Optionally, the earphone interface module includes left sound channel L end, right sound channel R end, microphone M end, socket ground end G and left sound channel normal close LO end and right sound channel normal close RO end, left sound channel L end with right sound channel R end all be connected with the audio output module, socket ground end G with the common terminal VCOMO is connected, microphone M end with the audio input module is connected, audio input control module with left sound channel normal close LO end is connected, left sound channel normal close LO end is linked together with left sound channel L end.
Optionally, the power control module is connected with the earphone interface module through a right channel normally closed RO end, and the right channel normally closed RO end is communicated with a right channel R end.
By adopting the technical scheme, when the earphone interface module is connected with the terminal equipment of the user in a wired way, the contact between the L0 end of the left channel switch and the L end of the left channel is disconnected, the current of the base B of the triode V is disconnected, the triode V is cut off and not conducted, and the collector of the triode V is high level; at this time, the gate of the first Nmos transistor Q1 is also at a high level, so that the drain and the source of the first Nmos transistor Q are normally connected to the common terminal VCOMO, and the common terminal VCOMO is connected to the ground GND of the earphone, so that the audio output module and the audio input module are all connected.
Optionally, the audio input control module further includes a current limiting resistor R2, and a collector of the triode V is connected in series with the current limiting resistor R2 and connected with the power control module through the current limiting resistor R2.
By adopting the technical scheme, the current limiting resistor R2 is connected in series in the circuit to limit the current of the branch circuit, so as to prevent the components such as the triode V from being burnt out due to overlarge current.
Optionally, the power control module includes a second Pmos tube Q2, a third Nmos tube Q3, and a power supply VCC, where a gate of the second Pmos tube Q2 is connected to a drain of the third Nmos tube Q3, a drain of the second Pmos tube Q2 is connected to the power supply input terminal v+, a source and a gate of the second Pmos tube Q2 are connected to an anode of the power supply VCC, a source of the third Nmos tube Q3 is grounded, a gate of the third Nmos tube Q3 is connected to a normally closed R0 end of the right channel, and a cathode of the power supply VCC is grounded.
By adopting the technical scheme, when the earphone interface module is connected with the terminal equipment of the user in a wired way, the contact between the right channel switch R0 end and the right channel end R is also disconnected, the voltage of the grid electrode of the third Nmos tube Q3 is disconnected, the grid electrode of the third Nmos tube Q3 is enabled to be in a low level, the drain electrode of the third Nmos tube Q3 and the grid electrode of the second Pmos tube Q2 are in a high level, the third Nmos tube Q3 is not conducted, the power supply supplied by the power supply VCC is disconnected, and therefore the purposes of power failure after wired connection and wireless earphone electric quantity saving are achieved.
Optionally, the power control module further includes a voltage dividing resistor R3 and a filter capacitor C, one end of the voltage dividing resistor R3 is connected to the gate of the third Nmos tube Q3, the other end is grounded, and the voltage dividing resistor R3 is connected in parallel with the filter capacitor C.
By adopting the technical scheme, the voltage is divided through the voltage dividing resistor R3, so that proper voltage can be conveniently provided for the grid electrode of the third Nmos tube Q3; the filter capacitor absorbs the interference voltage, so that the interference voltage is prevented from flowing to the second mos gate, and the misconduction condition of the third Nmos transistor Q3 is caused.
Optionally, the earphone interface module uses a universal 3.5 quadrupole socket.
Through adopting above-mentioned technical scheme, use general left and right sound track to have the flat price 3.5 quadrupole earphone socket of normally closed contact, need not additionally to customize high price special earphone socket, can more save the cost, shorten development cycle, reduce the time of preparing materials, quick production sales.
In summary, the utility model has the following beneficial technical effects: when the wireless earphone is connected to the terminal equipment of the user in a wired way, the earphone interface module responds and outputs an access signal, the audio input control module responds to the access signal, controls the audio input module of the wireless earphone to be conducted, and outputs an audio input conducting signal; the power supply control module responds to the access signal and the audio input conduction signal, controls the conduction of the audio output module of the wireless earphone, and performs wired power supply; at this time, after the wired external terminal equipment is connected, the audio input and output of the wireless earphone and the power supply circuit are all connected, so that the purpose that the wired circuit shares the wireless earphone microphone is achieved, and the use experience effect is improved.
Drawings
Fig. 1 is a circuit diagram of a wireless headset supporting wired input according to an embodiment of the present application.
Fig. 2 is a logic block diagram of a wireless headset supporting wired input according to an embodiment of the present application.
Reference numerals illustrate: 1. a headset interface module; 2. a wireless earphone module; 3. a power control module; 4. an audio output module; 5. an audio input module; 6. an audio input control module.
Detailed Description
The utility model is described in further detail below with reference to fig. 1-2.
The embodiment of the utility model discloses a wireless earphone supporting wired input.
Referring to fig. 1 and 2, a wireless earphone supporting wired input includes an earphone interface module 1, a wireless earphone module 2, a power control module 3, an audio output module 4, an audio input module 5, and an audio input control module 6; the wireless earphone module 2 is used for connecting an audio output module 4 and an audio input module 5 of the wireless earphone; the earphone interface module 1 is used for connecting terminal equipment of a user and the wireless earphone module 2 and outputting an access signal; the audio input control module 6 is connected to the earphone interface module 1, the power supply control module 3 and the wireless earphone module 2, and is used for responding to the access signal, controlling the conduction of the audio input module 5 of the wireless earphone and outputting an audio input conduction signal; the power control module 3 is connected to the earphone interface module 1 and the wireless earphone module 2, and is configured to respond to the access signal and the audio input on signal, supply power, and control the audio output module 4 to be turned on.
In this embodiment, when the wireless earphone is wired to the terminal device of the user, the earphone interface module 1 responds and outputs an access signal, and the audio input control module 6 responds to the access signal, controls the audio input module 5 of the wireless earphone to be turned on, and outputs an audio input on signal; the power supply control module 3 responds to the access signal and the audio input conduction signal, controls the conduction of the audio output module 4 of the wireless earphone, and performs wired power supply; at this time, after the wired external terminal equipment is connected, the audio input and output of the wireless earphone and the power supply circuit are all connected, so that the purpose that the wired circuit shares the wireless earphone microphone is achieved, and the use experience effect is improved.
The wireless earphone module 2 comprises a power input end V+, an audio differential output right channel HPR, an audio differential output left channel HPL, a public end VCOMO, a microphone input end MIC+ and an earphone ground end GND, wherein the power input end V+ is connected with the power control module 3, the audio differential output left channel HPL and the audio differential output right channel HPR are connected with the audio output module 4, the public end VCOMO is connected with the audio input control module 6, and the audio input module 5 is connected with the microphone input end MIC+ and the earphone ground end GND.
In this embodiment, when the wireless earphone is wired to the terminal device of the user, the earphone interface module 1 responds and outputs an access signal, the audio input control module 6 responds to the access signal and outputs an audio input conducting signal, and simultaneously, the audio input module 5 is conducted through the common terminal VCOMO; the power supply control module 3 responds to the access signal and the audio input conduction signal, supplies power to the audio input module 5 and the audio output module 4 through the power supply input end V+ and conducts all the power; the audio frequency difference output left channel HPL and the audio frequency difference output right channel HPR are connected to the audio frequency output module 4 and are respectively used for conducting the left speaker and the right speaker of the wireless earphone; the microphone input terminal mic+ and the earphone ground terminal GND are both connected to the audio input module 5 for turning on the microphone of the wireless earphone.
The earphone interface module 1 comprises a left channel L end, a right channel R end, a microphone M end, a socket ground end G, a left channel normally closed LO end and a right channel normally closed RO end, wherein the left channel L end and the right channel R end are both connected with the audio output module 4, the socket ground end G is connected with the common end VCOMO, the microphone M end is connected with the audio input module 5, the audio input control module 6 is connected with the left channel normally closed LO end, and the left channel normally closed LO end is communicated with the left channel L end.
The power supply control module 3 is connected with the earphone interface module 1 through a right channel normally closed RO end, and the right channel normally closed RO end is communicated with a right channel R end.
In the embodiment, when the wireless earphone is used in a wireless mode, the normally closed LO end of the left sound channel is communicated with the L end of the left sound channel; when the earphone interface module 1 is connected with the terminal equipment of the user in a wired way, the contact between the left channel switch LO end and the left channel end L is disconnected, and the contact between the right channel switch RO end and the right channel end R is also disconnected, so that the earphone interface module 1 generates an access signal; the audio input control module 6 and the power control module 3 receive and respond to the access signal, thereby completing the switching between the wireless mode and the wired mode.
The audio input control module 6 comprises an NPN triode V, a first Nmos tube Q1 and a bias resistor R1, wherein the grid electrode of the first Nmos tube Q1 is connected to the collector electrode of the triode V, the drain electrode of the first Nmos tube Q1 is connected to the common end VCOMO, the source electrode of the first Nmos tube Q1 is grounded, one end of the bias resistor R1 is connected to the source electrode of the first Nmos tube Q1, and the other end of the bias resistor R1 is connected to the grid electrode of the first Nmos tube Q1; the audio input control module 6 is connected with the power control module 3 through the collector of the triode V.
In this embodiment, when the earphone interface module 1 is connected with the terminal device of the user in a wired manner, the contact between the left channel switch L0 end and the left channel end L is disconnected, the current of the base B of the triode V is also disconnected, and the triode V is turned off and not turned on, so that the collector of the triode V is at a high level; at this time, the gate of the first Nmos transistor Q1 is also at a high level, so that the drain and the source thereof are normally connected to the common terminal VCOMO, and the common terminal VCOMO is connected to the earphone ground GND, thereby turning on all the audio output module 4 and the audio input module 5.
The audio input control module 6 further comprises a current limiting resistor R2, wherein the collector of the triode V is connected with the current limiting resistor R2 in series and is connected with the power supply control module 3 through the current limiting resistor R2; the current limiting resistor R2 is connected in series in the circuit to limit the current of the branch circuit, so as to prevent the components such as the triode V from being burnt out due to overlarge current.
The power control module 3 includes a second Pmos tube Q2, a third Nmos tube Q3, and a power supply VCC, where a gate of the second Pmos tube Q2 is connected to a drain of the third Nmos tube Q3, a drain of the second Pmos tube Q2 is connected to a power supply input v+, a source and a gate of the second Pmos tube Q2 are connected to an anode of the power supply VCC, a source of the third Nmos tube Q3 is grounded, a gate of the third Nmos tube Q3 is connected to a normally closed R0 end of the right channel, and a cathode of the power supply VCC is grounded.
In this embodiment, when the earphone interface module 1 is wired to the terminal device of the user, the contact between the right channel switch R0 end and the right channel end R is also disconnected, the voltage of the gate of the third Nmos tube Q3 is disconnected, the gate of the third Nmos tube Q3 is made to be at a low level, the drain of the third Nmos tube Q3 and the gate of the second Pmos tube Q2 are at a high level, the third Nmos tube Q3 is not turned on, and the power supply supplied by the power supply VCC is disconnected, so that the power is cut off after the wired connection is achieved, and the purpose of saving the electric quantity of the wireless earphone is achieved.
The power supply control module 3 further comprises a voltage dividing resistor R3 and a filter capacitor C, one end of the voltage dividing resistor R3 is connected to the grid electrode of the third Nmos tube Q3, the other end of the voltage dividing resistor R3 is grounded, and the voltage dividing resistor R3 is connected with the filter capacitor C in parallel; the voltage is divided through the voltage dividing resistor R3, so that a proper voltage is conveniently provided for the grid electrode of the third Nmos tube Q3; the filter capacitor absorbs the interference voltage, so that the interference voltage is prevented from flowing to the second mos gate, and the misconduction condition of the third Nmos transistor Q3 is caused.
In the present embodiment, the headphone interface module 1 uses a general 3.5 quadrupole socket; the universal low-price 3.5 quadrupole earphone socket with normally closed contacts on the left and right sound channels is used, and the special high-price earphone socket does not need to be customized additionally, so that the cost can be saved, the development period is shortened, the material preparation time is shortened, and the production and the sales are fast.
In addition, the wireless headset module 2 is provided as a bluetooth chip. In this application, do not limit to bluetooth chip's specific model, but all the models of setting possess power input end V+, audio frequency difference output left channel HPL, audio frequency difference output right channel HPR, audio frequency difference output left and right sides channel common terminal VCOMO, and microphone input end MIC+ and earphone ground end GND etc. characteristic then all is within the scope of protection of this application.
The implementation principle of the wireless earphone supporting wired input in the embodiment of the utility model is as follows: when the earphone interface module 1 is not connected with terminal equipment in a wired way, the normally closed LO end of the left sound channel is communicated with the L end of the left sound channel, the normally closed RO end of the right sound channel is also communicated with the R end of the right sound channel, and the whole wireless earphone is normally conducted;
when the earphone interface module 1 is connected to the terminal equipment in a wired way, the contact between the LO end of the left channel switch and the L end of the left channel is disconnected, the current of the base B of the triode V is disconnected, and the triode V is cut off and not conducted, so that the collector of the triode V is in a high level; at this time, the gate of the first Nmos transistor Q1 is also at a high level, so that the drain and the source of the first Nmos transistor Q are normally connected to the common terminal VCOMO, and the common terminal VCOMO is connected to the earphone ground GND, so that the audio output module 4 and the audio input module 5 are all connected;
meanwhile, when the earphone interface module 1 is connected to the terminal equipment in a wired way, the contact between the right channel switch R0 end and the right channel end R is also disconnected, the voltage of the grid electrode of the third Nmos tube Q3 is disconnected, the grid electrode of the third Nmos tube Q3 is enabled to be in a low level, the drain electrode of the third Nmos tube Q3 and the grid electrode of the second Pmos tube Q2 are in a high level, the third Nmos tube Q3 is not conducted, the power supply supplied by the power supply VCC is disconnected, and therefore the purposes of power failure after wired connection and wireless earphone electric quantity saving are achieved;
so far, the audio input module 5 and the audio output module 4 of the wireless earphone are all normally turned on, and the power supply VCC of the wireless earphone is disconnected and is switched into wired power supply.
Through the design of the structure, the purpose of automatically powering off after the terminal equipment is connected by the wire and automatically switching the wire and wireless modes of the wireless earphone is realized, so that the wireless earphone can normally use the loudspeaker and the microphone in the wire and wireless modes, and the user experience is improved.
The above embodiments are not intended to limit the scope of the present utility model, so: all equivalent changes in structure, shape and principle of the utility model should be covered in the scope of protection of the utility model.

Claims (7)

1. A wireless headset supporting wired input, characterized by: the wireless earphone comprises an earphone interface module (1), a wireless earphone module (2), a power supply control module (3), an audio output module (4), an audio input module (5) and an audio input control module (6);
the wireless earphone module (2) is used for connecting an audio output module (4) and an audio input module (5) of the wireless earphone;
the earphone interface module (1) is used for connecting terminal equipment of a user and the wireless earphone module (2) and outputting an access signal;
the audio input control module (6) is connected with the earphone interface module (1), the power supply control module (3) and the wireless earphone module (2) and is used for responding to the access signal, controlling the conduction of the audio input module (5) of the wireless earphone and outputting an audio input conduction signal;
the power supply control module (3) is connected with the earphone interface module (1) and the wireless earphone module (2) and is used for responding to the access signal and the audio input conduction signal, supplying power and controlling the conduction of the audio output module (4);
the wireless earphone module (2) comprises a power input end V+, an audio differential output right channel HPR, an audio differential output left channel HPL, a public end VCO, a microphone input end MIC+ and an earphone ground end GND, wherein the power input end V+ is connected with the power control module (3), the audio differential output left channel HPL and the audio differential output right channel HPR are both connected with the audio output module (4), the public end VCO is connected with the audio input control module (6), and the audio input module (5) is connected with the microphone input end MIC+ and the earphone ground end GND;
the audio input control module (6) comprises an NPN triode V, a first Nmos tube Q1 and a bias resistor R1, wherein the grid electrode of the first Nmos tube Q1 is connected with the collector electrode of the triode V, the drain electrode of the first Nmos tube Q1 is connected with the common end VCOMO, the source electrode of the first Nmos tube Q1 is grounded, one end of the bias resistor R1 is connected with the source electrode of the first Nmos tube Q1, and the other end of the bias resistor R1 is connected with the grid electrode of the first Nmos tube Q1; the audio input control module (6) is connected with the power supply control module (3) through the collector electrode of the triode V.
2. A wireless headset supporting wired input as recited in claim 1, wherein: the earphone interface module (1) comprises a left channel L end, a right channel R end, a microphone M end, a socket ground end G, a left channel normally closed LO end and a right channel normally closed RO end, wherein the left channel L end and the right channel R end are connected with the audio output module (4), the socket ground end G and the common end VCO are connected, the microphone M end and the audio input module (5) are connected, the audio input control module (6) and the left channel normally closed LO end are connected, and the left channel normally closed LO end is communicated with the left channel L end.
3. A wireless headset supporting wired input as recited in claim 2, wherein: the power supply control module (3) is connected with the earphone interface module (1) through a right-channel normally-closed RO end, and the right-channel normally-closed RO end is communicated with a right-channel R end.
4. A wireless headset supporting wired input as recited in claim 1, wherein: the audio input control module (6) further comprises a current limiting resistor R2, and the collector of the triode V is connected with the current limiting resistor R2 in series and connected with the power supply control module (3) through the current limiting resistor R2.
5. A wireless headset supporting wired input as recited in claim 2, wherein: the power supply control module (3) comprises a second Pmos tube Q2, a third Nmos tube Q3 and a power supply VCC, wherein a grid electrode of the second Pmos tube Q2 is connected to a drain electrode of the third Nmos tube Q3, a drain electrode of the second Pmos tube Q2 is connected to the power supply input end V+, a source electrode and a grid electrode of the second Pmos tube Q2 are connected to an anode of the power supply VCC, a source electrode of the third Nmos tube Q3 is grounded, a grid electrode of the third Nmos tube Q3 is connected to a normally closed R0 end of a right channel, and a cathode of the power supply VCC is grounded.
6. A wireless headset supporting wired input as recited in claim 5, wherein: the power supply control module (3) further comprises a voltage dividing resistor R3 and a filter capacitor C, one end of the voltage dividing resistor R3 is connected to the grid electrode of the third Nmos tube Q3, the other end of the voltage dividing resistor R3 is grounded, and the voltage dividing resistor R3 is connected with the filter capacitor C in parallel.
7. A wireless headset supporting wired input as recited in claim 1, wherein: the earphone interface module (1) uses a universal 3.5 quadrupole socket.
CN202223371138.1U 2022-12-14 2022-12-14 Wireless earphone supporting wired input Active CN219420983U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202223371138.1U CN219420983U (en) 2022-12-14 2022-12-14 Wireless earphone supporting wired input

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202223371138.1U CN219420983U (en) 2022-12-14 2022-12-14 Wireless earphone supporting wired input

Publications (1)

Publication Number Publication Date
CN219420983U true CN219420983U (en) 2023-07-25

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Application Number Title Priority Date Filing Date
CN202223371138.1U Active CN219420983U (en) 2022-12-14 2022-12-14 Wireless earphone supporting wired input

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