CN106254983A - A kind of handset earphone circuit - Google Patents

A kind of handset earphone circuit Download PDF

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Publication number
CN106254983A
CN106254983A CN201610674773.7A CN201610674773A CN106254983A CN 106254983 A CN106254983 A CN 106254983A CN 201610674773 A CN201610674773 A CN 201610674773A CN 106254983 A CN106254983 A CN 106254983A
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China
Prior art keywords
resistance
equivalent resistance
audio signal
channel audio
equivalent
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CN201610674773.7A
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Chinese (zh)
Inventor
王蓬渤
张捍东
倪漫利
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Shenzhen Tinno Wireless Technology Co Ltd
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Shenzhen Tinno Wireless Technology Co Ltd
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Priority to CN201610674773.7A priority Critical patent/CN106254983A/en
Publication of CN106254983A publication Critical patent/CN106254983A/en
Pending legal-status Critical Current

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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R1/00—Details of transducers, loudspeakers or microphones
    • H04R1/10—Earpieces; Attachments therefor ; Earphones; Monophonic headphones
    • H04R1/1091—Details not provided for in groups H04R1/1008 - H04R1/1083
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R3/00—Circuits for transducers, loudspeakers or microphones
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
    • H04R2430/00—Signal processing covered by H04R, not provided for in its groups

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  • Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Acoustics & Sound (AREA)
  • Signal Processing (AREA)
  • Stereophonic System (AREA)

Abstract

The invention discloses a kind of handset earphone circuit.This circuit includes the first electric capacity, the second electric capacity, the first equivalent resistance, the second equivalent resistance, third equivalent resistance, the first anti-crosstalk circuit and the second anti-crosstalk circuit；One end of first electric capacity receives left channel audio signal, one end of second electric capacity receives right channel audio signal, the other end of the first electric capacity and one end of the first equivalent resistance connect, the other end of the second electric capacity and one end of the second equivalent resistance connect, the other end of the first equivalent resistance and the second equivalent resistance is connected with one end of third equivalent resistance after connecting, the other end ground connection of third equivalent resistance；Wherein, the first anti-crosstalk circuit is serially connected between the first electric capacity and the first equivalent resistance, and the second anti-crosstalk circuit is serially connected between the second electric capacity and the second equivalent resistance.By the way, the present invention can reduce the crosstalk between left channel audio signal and right channel audio signal, thus improves the separating degree of earphone neutral body sound audio.

Description

A kind of handset earphone circuit
Technical field
The present invention relates to electronic technology field, particularly relate to a kind of handset earphone circuit.
Background technology
In existing handset earphone circuit, owing to the line of earphone hinders and the depositing of resistance to earth of shell fragment resistance of earphone So that when head circuit transmits left channel audio signal and right channel audio signal, it may appear that left channel audio signal Flow in right channel audio signal and right channel audio signal flows in left channel audio signal, thus asking of crosstalk occurs Topic.
Summary of the invention
The technical problem that present invention mainly solves is to provide a kind of handset earphone circuit, it is possible to reduce left channel audio signal And the crosstalk between right channel audio signal, thus improve the separating degree of earphone neutral body sound audio.
For solving above-mentioned technical problem, the technical scheme that the present invention uses is: provide a kind of handset earphone circuit, its In, this circuit includes the first electric capacity, the second electric capacity, the first equivalent resistance of equivalence L channel earphone speaker, equivalence R channel Second equivalent resistance of earphone speaker, equivalence earphone cord and the third equivalent resistance of headset plug, the first anti-crosstalk circuit and Second anti-crosstalk circuit；
One end of first electric capacity receives left channel audio signal, and one end of the second electric capacity receives right channel audio signal, the The other end of one electric capacity and one end of the first equivalent resistance connect, and the other end of the second electric capacity and one end of the second equivalent resistance are even Connecing, the other end of the first equivalent resistance and the second equivalent resistance is connected with one end of third equivalent resistance after connecting, third equivalent The other end ground connection of resistance；
First anti-crosstalk circuit is serially connected between the first electric capacity and the first equivalent resistance, flows into the first electric capacity for stoping Left channel audio signal and right channel audio signal generation crosstalk；
Second anti-crosstalk circuit is serially connected between the second electric capacity and the second equivalent resistance, flows into the second electric capacity for stoping Right channel audio signal and left channel audio signal generation crosstalk.
Wherein, the first anti-crosstalk circuit is the first resistance, and the second anti-crosstalk circuit is the second resistance.
Wherein, when the resistance of the first equivalent resistance and the second equivalent resistance is identical, the first resistance and the resistance of the second resistance Time identical, the crosstalk of right channel audio signal is calculated by left channel audio signal according to equation below:
VL≈VA*R2/R3
V R = V A * R 2 R 1 + R 2 ;
CL=-20log (VL/VR)
Wherein, VLIt is the voltage at the first equivalent resistance two ends, VRIt is the voltage at the second equivalent resistance two ends, VAIt is first etc. Effect resistance, the second equivalent resistance, the voltage corresponding to points of common connection of third equivalent resistance, R1 is the first resistance, the second electricity The resistance of resistance, R2 is the first equivalent resistance, the resistance of the second equivalent resistance, and R3 is the resistance of third equivalent resistance, CLFor left sound The audio channel signal crosstalk to right channel audio signal.
Wherein, right channel audio signal is equal to left channel audio signal to R channel sound to the crosstalk of left channel audio signal Frequently the crosstalk of signal.
Wherein, when the resistance of the first equivalent resistance, the second equivalent resistance is 32 ohm, and the resistance of third equivalent resistance is 1 Ohm, when the first resistance, the resistance of the second resistance are 68 ohm, the left channel audio signal crosstalk to right channel audio signal For-40dB.
Wherein, the first resistance, the second resistance resistance the biggest, the left channel audio signal string to right channel audio signal Disturb, right channel audio signal the least to the crosstalk of left channel audio signal.
Wherein, the first resistance, the second resistance resistance identical, the first resistance, the resistance of the second resistance are respectively less than equal to pre- Definite value, this predetermined value is by left channel audio signal, the magnitude of voltage of right channel audio signal and the first equivalent resistance, the second equivalence The magnitude of voltage at resistance two ends determines.
Wherein, predetermined value meets equation below:
V 1 - V A R A + R 2 = V 2 R 2 ;
V2≈VA*R2/R3
Wherein, V1 is the voltage of left channel audio signal, right channel audio signal, V2 be the first equivalent resistance, second etc. The voltage at effect resistance two ends, RA is the first resistance, the predetermined value of the second resistance, and R2 is the first equivalent resistance, the second equivalent resistance Resistance, R3 is the resistance of third equivalent resistance, VAIt is the first equivalent resistance, the second equivalent resistance, the public affairs of third equivalent resistance Voltage corresponding to junction point altogether.
Wherein, when the voltage of left channel audio signal, right channel audio signal is 850mV to the maximum, the first equivalent resistance, The voltage of two equivalent resistances is 300mV, and when the first equivalent resistance, the resistance of the second equivalent resistance are 32 ohm, predetermined value is 68 Ohm.
Wherein, the resistance of third equivalent resistance is less than 1 ohm.
The invention has the beneficial effects as follows: the handset earphone circuit of the present invention is by the first of transmission left channel audio signal Increase by the first anti-crosstalk circuit between electric capacity and the first equivalent resistance namely L channel earphone speaker, at transmission right audio channel Increase by the second anti-crosstalk circuit between second electric capacity of signal and the second equivalent resistance namely right-channel ear speaker, can subtract Crosstalk between little left channel audio signal and right channel audio signal, thus improve the separation of the stereo audio in earphone Degree, and then improve the Experience Degree of user.
Accompanying drawing explanation
Fig. 1 is the schematic diagram of the handset earphone circuit of the embodiment of the present invention；
Fig. 2 is the equivalence to the crosstalk of right channel audio signal of the left channel audio signal of handset earphone circuit shown in Fig. 1 Circuit diagram；
Fig. 3 is the equivalence to the crosstalk of left channel audio signal of the right channel audio signal of handset earphone circuit shown in Fig. 1 Circuit diagram.
Detailed description of the invention
Some vocabulary is employed to censure specific assembly, the skill in art in the middle of specification and claims Art personnel are it is to be appreciated that same assembly may be called with different nouns by manufacturer.This specification and claims book In the way of the difference by title is not used as distinguishing assembly, but it is used as the base distinguished with assembly difference functionally Accurate.The present invention is described in detail with embodiment below in conjunction with the accompanying drawings.
Fig. 1 is the schematic diagram of the handset earphone circuit of the embodiment of the present invention.As it is shown in figure 1, handset earphone circuit includes: the One electric capacity C1, the second electric capacity C2, the first equivalent resistance RA1 of equivalence L channel earphone speaker, equivalence right-channel ear are raised one's voice Second equivalent resistance RA2 of device, equivalence earphone cord and the third equivalent resistance RB of earphone shell fragment, the first anti-crosstalk circuit 10 and the Two anti-crosstalk circuit 20.
One end of first electric capacity C1 receives one end of left channel audio signal INPUT_L, the second electric capacity C2 and receives R channel Audio signal INPUT_R, the other end of the first electric capacity C1 and one end of the first equivalent resistance RA1 connect, and the second electric capacity C2's is another One end of one end and the second equivalent resistance RA2 connects, and the other end of the first equivalent resistance RA1 and the second equivalent resistance RA2 connects One end with third equivalent resistance RB is connected afterwards, the other end ground connection GND of third equivalent resistance RB.
First anti-crosstalk circuit 10 is serially connected between the first electric capacity C1 and the first equivalent resistance RA1, is used for stoping inflow The left channel audio signal of one electric capacity C1 and right channel audio signal generation crosstalk.
Second anti-crosstalk circuit 20 is serially connected between the second electric capacity C2 and the second equivalent resistance RA2, is used for stoping inflow The right channel audio signal of two electric capacity C2 and left channel audio signal generation crosstalk.
In the present embodiment, the first anti-crosstalk circuit 10 is the first resistance RCL, and the second anti-crosstalk circuit 20 is the second resistance RCR.Preferably, in the present embodiment, first anti-crosstalk circuit the 10, second anti-crosstalk circuit 20 is arranged on earphone end.At other In embodiment, first anti-crosstalk circuit the 10, second anti-crosstalk circuit 20 can also be arranged on mobile phone terminal.
In the present embodiment, third equivalent resistance RB is that the line resistance of earphone cord, earphone shell fragment contact resistance etc. are to the earth Impedance.Wherein, the impedance of third equivalent resistance RB is less, generally less than 1 ohm.
Please also refer to the left channel audio signal that Fig. 2, Fig. 2 are handset earphones circuit shown in Fig. 1, right audio channel is believed Number the equivalent circuit diagram of crosstalk, as in figure 2 it is shown, calculate the left channel audio signal crosstalk to right channel audio signal when needing Time, one end of the first resistance RCL receives left channel audio signal INPUT_L, the other end of the first resistance RCL and the first equivalent electric One end of resistance RA1 connects, the other end of one end ground connection GND of the second resistance RCR, the second resistance RCR and the second equivalent resistance RA2 One end connect, the other end of the first equivalent resistance RA1, the second equivalent resistance RA2 the other end connect after with third equivalent electricity One end of resistance RB connects, the other end ground connection GND of third equivalent resistance RB.
When the resistance of the first equivalent resistance RA1 and the second equivalent resistance RA2 is identical, the first resistance RCL and the second resistance RCR Resistance identical time, the crosstalk of right channel audio signal is calculated by left channel audio signal according to equation below:
VL≈VA*R2/R3
V R = V A * R 2 R 1 + R 2 ;
CL=-20log (VL/VR)
Wherein, VLIt is the voltage at the first equivalent resistance RA1 two ends, VRIt is the voltage at the second equivalent resistance RA2 two ends, VAFor First equivalent resistance RA1, the second equivalent resistance RA2, the voltage corresponding to points of common connection of third equivalent resistance RB, R1 is One resistance RCL, the resistance of the second resistance RCR, R2 is the first equivalent resistance RA1, the resistance of the second equivalent resistance RA2, and R3 is The resistance of three equivalent resistance RB, CLFor the left channel audio signal crosstalk to right channel audio signal.
It will be understood to those skilled in the art that owing to R channel series resistance RR is the second equivalent resistance RA2 and second Resistance RCR sum, namely RR=R1+R2, and the resistance value after R channel series resistance RR and third equivalent resistance RB parallel connection RX is far longer than third equivalent resistance RB due to R channel series resistance RR, thus is nearly equal to the value of third equivalent resistance RB, Namely RX=RR*R3/ (RR+R3) ≈ R3, therefore, the voltage V at the first equivalent resistance RA1 two endsLMeet equation below:
VL=VA*R2/RX≈VA*R2/R3。
Wherein, when the resistance of the first equivalent resistance RA1, the second equivalent resistance RA2 is 32 ohm, the first resistance RCL, second When the resistance of resistance RCR is 68 ohm, when the resistance of third equivalent resistance RB is 1 ohm, left channel audio signal is to R channel The crosstalk of audio signal is-40dB.It will be understood to those skilled in the art that when handset earphone circuit does not adds the first resistance RCL and the second resistance RCR, in the case of other condition is constant, the crosstalk of right channel audio signal is by left channel audio signal- 30dB。
It is to say, the handset earphone circuit of the present invention is compared with the handset earphone circuit of prior art, left audio Signal decreases 10dB to the crosstalk of right channel audio signal, and corresponding stereo isolation improves 10dB.
In the present embodiment, due to the circuit of transmission left channel audio signal and the circuit of transmission right channel audio signal it is Symmetrical, therefore, right channel audio signal is equal to left channel audio signal to right sound to the crosstalk of left channel audio signal The crosstalk of audio channel signal.
Specifically, it is that the right channel audio signal of handset earphone circuit shown in Fig. 1 is to left sound please also refer to Fig. 3, Fig. 3 The equivalent circuit diagram of the crosstalk of audio channel signal, as it is shown on figure 3, when needing calculating right channel audio signal that left audio is believed Number crosstalk time, one end ground connection of the first resistance RCL, one end of the other end of the first resistance RCL and the first equivalent resistance RA1 is even Connecing, one end of the second resistance RCR receives right channel audio signal INPUT_R, the other end of the second resistance RCR and the second equivalent electric One end of resistance RA2 connects, and the other end of the first equivalent resistance RA1, the other end of the second equivalent resistance RA2 are third with the after connecting One end of effect resistance RB connects, the other end ground connection GND of third equivalent resistance RB.
When the resistance of the first equivalent resistance RA1 and the second equivalent resistance RA2 is identical, the first resistance RCL and the second resistance RCR Resistance identical time, the crosstalk of left channel audio signal is calculated by right channel audio signal according to equation below:
V L = V A * R 2 R 1 + R 2
VR=VA*R2/R3；
CR=-20log (VR/VL)
Wherein, VLIt is the voltage at the first equivalent resistance RA1 two ends, VRIt is the voltage at the second equivalent resistance RA2 two ends, VAFor First equivalent resistance RA1, the second equivalent resistance RA2, the voltage corresponding to points of common connection of third equivalent resistance RB, R1 is One resistance RCL, the resistance of the second resistance RCR, R2 is the first equivalent resistance RA1, the resistance of the second equivalent resistance RA2, and R3 is The resistance of three equivalent resistance RB, CRFor the right channel audio signal crosstalk to left channel audio signal.
In other embodiments, in applying due to reality, the first equivalent resistance RA1 and the resistance of the second equivalent resistance RA2 It is equal namely L channel earphone speaker and right-channel ear speaker are identical, when the resistance of the first resistance RCL is more than During the resistance of the second resistance RCR, left channel audio signal to the crosstalk of right channel audio signal less than right channel audio signal pair The crosstalk of left channel audio signal.
It addition, in the present embodiment, the first resistance RCL, the second resistance resistance RCR the biggest, left channel audio signal pair The crosstalk of right channel audio signal, right channel audio signal are the least to the crosstalk of left channel audio signal.But the first resistance RCL, the second resistance RCR resistance the biggest, the volume of earphone can be the least.Therefore, in order to meet the hearing effect of normal earphone, the One resistance RCL, the resistance of the second resistance RCR are less than or equal to predetermined value, and this predetermined value is by left channel audio signal, right audio channel The voltage of the voltage of signal and the first equivalent resistance, the second equivalent resistance two ends determines, this predetermined value meets equation below:
V 1 - V A R A + R 2 = V 2 R 2 ;
V2≈VA*R2/R3
Wherein, V1 is the voltage of left channel audio signal, right channel audio signal, V2 be the first equivalent resistance RA1, second The voltage at equivalent resistance RA2 two ends, RA is the first resistance RCL, the predetermined value of the second resistance RCR, and R2 is the first equivalent resistance RA1, the resistance of the second equivalent resistance RA2, R3 is the resistance of third equivalent resistance RB, VABe the first equivalent resistance RA1, second etc. Effect resistance RA2, the voltage corresponding to points of common connection of third equivalent resistance RB.
Wherein, the maximum capacity of earphone is driven to be 850mV namely left channel audio signal, right audio channel when chip for cell phone The voltage of signal is 850mV to the maximum, and the normal input voltage of earphone is 300mV namely the first equivalent resistance RA1, the second equivalent electric The voltage at resistance RA2 two ends is 300mV, when the first equivalent resistance RA1, the resistance of the second equivalent resistance RA2 are 32 ohm, and the first electricity Resistance RCL, the predetermined value of the second resistance RCR namely maximum resistance are 68 ohm.
The invention has the beneficial effects as follows: the handset earphone circuit of the present invention is by the first of transmission left channel audio signal Increase by the first anti-crosstalk circuit between electric capacity and the first equivalent resistance namely L channel earphone speaker, at transmission right audio channel Increase by the second anti-crosstalk circuit between second electric capacity of signal and the second equivalent resistance namely right-channel ear speaker, can subtract Crosstalk between little left channel audio signal and right channel audio signal, thus improve the separation of the stereo audio in earphone Degree, and then improve the Experience Degree of user.
The foregoing is only embodiments of the present invention, not thereby limit the scope of the claims of the present invention, every utilization is originally Equivalent structure or equivalence flow process that description of the invention and accompanying drawing content are made convert, or are directly or indirectly used in what other were correlated with Technical field, is the most in like manner included in the scope of patent protection of the present invention.

Claims (10)

1. a handset earphone circuit, it is characterised in that described circuit includes the first electric capacity, the second electric capacity, equivalence L channel ear First equivalent resistance of machine speaker, the second equivalent resistance of equivalence right-channel ear speaker, equivalence earphone cord and earphone are inserted Third equivalent resistance, the first anti-crosstalk circuit and the second anti-crosstalk circuit of head；
One end of described first electric capacity receives left channel audio signal, and one end of described second electric capacity receives right audio channel letter Number, the other end of described first electric capacity and one end of described first equivalent resistance connect, the other end of described second electric capacity and institute The one end stating the second equivalent resistance connects, with institute after the other end connection of described first equivalent resistance and described second equivalent resistance The one end stating third equivalent resistance connects, the other end ground connection of described third equivalent resistance；
Described first anti-crosstalk circuit is serially connected between described first electric capacity and described first equivalent resistance, is used for stoping inflow institute State the described left channel audio signal of the first electric capacity and described right channel audio signal generation crosstalk；
Described second anti-crosstalk circuit is serially connected between described second electric capacity and described second equivalent resistance, is used for stoping inflow institute State the described right channel audio signal of the second electric capacity and described left channel audio signal generation crosstalk.
Circuit the most according to claim 1, it is characterised in that described first anti-crosstalk circuit is the first resistance, described Two anti-crosstalk circuit are the second resistance.
Circuit the most according to claim 2, it is characterised in that when described first equivalent resistance and described second equivalent resistance Resistance identical, when described first resistance is identical with the resistance of described second resistance, described left channel audio signal is to the described right side The crosstalk of channel audio signal calculates according to equation below:
V L ≈ V A * R 2 / R 3 V R = V A * R 2 R 1 + R 2 C L = - 20 log ( V L / V R ) ;
Wherein, VLFor the voltage at described first equivalent resistance two ends, VRFor the voltage at described second equivalent resistance two ends, VAFor institute Stating the first equivalent resistance, described second equivalent resistance, the voltage corresponding to points of common connection of described third equivalent resistance, R1 is Described first resistance, the resistance of described second resistance, R2 is described first equivalent resistance, the resistance of described second equivalent resistance, R3 is the resistance of described third equivalent resistance, CLFor the crosstalk to described right channel audio signal of the described left channel audio signal.
Circuit the most according to claim 3, it is characterised in that described left audio is believed by described right channel audio signal Number crosstalk equal to the crosstalk to described right channel audio signal of the described left channel audio signal.
Circuit the most according to claim 4, it is characterised in that when described first equivalent resistance, described second equivalent resistance Resistance be 32 ohm, the resistance of described third equivalent resistance is 1 ohm, described first resistance, the resistance of described second resistance When being 68 ohm, described left channel audio signal is-40dB to the crosstalk of described right channel audio signal.
Circuit the most according to claim 4, it is characterised in that described first resistance, described second resistance resistance the biggest, Described left channel audio signal to the crosstalk of described right channel audio signal, described right channel audio signal to described L channel sound Frequently the crosstalk of signal is the least.
Circuit the most according to claim 2, it is characterised in that described first resistance, described second resistance resistance identical, Described first resistance, the resistance of described second resistance are respectively less than equal to predetermined value, this predetermined value by described left channel audio signal, The voltage of the voltage of described right channel audio signal and described first equivalent resistance, described second equivalent resistance two ends determines.
Circuit the most according to claim 7, it is characterised in that described predetermined value meets equation below:
V 1 - V A R A + R 2 = V 2 R 2 V 2 ≈ V A * R 2 / R 3 ;
Wherein, V1 is described left channel audio signal, the voltage of described right channel audio signal, and V2 is described first equivalent electric Resistance, the voltage at described second equivalent resistance two ends, RA is described first resistance, the predetermined value of described second resistance, and R2 is described First equivalent resistance, the resistance of described second equivalent resistance, R3 is the resistance of described third equivalent resistance, VAFor described first etc. Effect resistance, described second equivalent resistance, the voltage corresponding to points of common connection of described third equivalent resistance.
Circuit the most according to claim 7, it is characterised in that when described left channel audio signal, described right audio channel The voltage of signal is 850mV to the maximum, and described first equivalent resistance, the voltage of described second equivalent resistance are 300mV, and described first When equivalent resistance, the resistance of described second equivalent resistance are 32 ohm, described predetermined value is 68 ohm.
Circuit the most according to claim 1, it is characterised in that the resistance of described third equivalent resistance is less than 1 ohm.
CN201610674773.7A 2016-08-16 2016-08-16 A kind of handset earphone circuit Pending CN106254983A (en)

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Application Number Priority Date Filing Date Title
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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109842836A (en) * 2017-11-27 2019-06-04 华为终端有限公司 A kind of method, circuit and equipment eliminated audio signal and play crosstalk between access
CN110321098A (en) * 2019-06-21 2019-10-11 维沃移动通信有限公司 A kind of terminal device, audio frequency broadcast system and voicefrequency circuit
CN111901727A (en) * 2020-07-30 2020-11-06 维沃移动通信有限公司 Audio control circuit and electronic equipment

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CN103096216A (en) * 2013-02-07 2013-05-08 青岛歌尔声学科技有限公司 Audio processing circuit and earphone
CN103297894A (en) * 2012-02-27 2013-09-11 华为终端有限公司 Earphone power amplifier, working method and mobile terminal equipment
CN103369430A (en) * 2012-04-02 2013-10-23 鸿富锦精密工业（深圳）有限公司 Earphone interface circuit and audio playing device
WO2016086805A1 (en) * 2014-12-04 2016-06-09 青岛歌尔声学科技有限公司 Audio processing circuit for eliminating plug-in and plug-out noise of earphone, and line control earphone

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101491117A (en) * 2006-07-08 2009-07-22 艾利森电话股份有限公司 Crosstalk cancellation using load impedence measurements
CN103297894A (en) * 2012-02-27 2013-09-11 华为终端有限公司 Earphone power amplifier, working method and mobile terminal equipment
CN103369430A (en) * 2012-04-02 2013-10-23 鸿富锦精密工业（深圳）有限公司 Earphone interface circuit and audio playing device
CN103096216A (en) * 2013-02-07 2013-05-08 青岛歌尔声学科技有限公司 Audio processing circuit and earphone
WO2016086805A1 (en) * 2014-12-04 2016-06-09 青岛歌尔声学科技有限公司 Audio processing circuit for eliminating plug-in and plug-out noise of earphone, and line control earphone

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109842836A (en) * 2017-11-27 2019-06-04 华为终端有限公司 A kind of method, circuit and equipment eliminated audio signal and play crosstalk between access
CN110321098A (en) * 2019-06-21 2019-10-11 维沃移动通信有限公司 A kind of terminal device, audio frequency broadcast system and voicefrequency circuit
CN110321098B (en) * 2019-06-21 2023-02-07 维沃移动通信有限公司 Terminal equipment, audio playing system and audio circuit
CN111901727A (en) * 2020-07-30 2020-11-06 维沃移动通信有限公司 Audio control circuit and electronic equipment

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