CN217546274U - Earphone POP sound elimination circuit and electronic equipment - Google Patents
Earphone POP sound elimination circuit and electronic equipment Download PDFInfo
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- CN217546274U CN217546274U CN202123450125.9U CN202123450125U CN217546274U CN 217546274 U CN217546274 U CN 217546274U CN 202123450125 U CN202123450125 U CN 202123450125U CN 217546274 U CN217546274 U CN 217546274U
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Abstract
The utility model provides an earphone POP sound cancelling circuit and electronic equipment, include: the device comprises an audio IC circuit, an earphone interface loop, an audio output loop, a charging and discharging loop, a control loop and a detection loop; the audio output end of the audio IC circuit is electrically connected with the audio output end of the interface circuit through an audio output loop, the detection end of the interface circuit is electrically connected with the input end of the audio IC circuit and the input end of the detection loop, the signal output end of the audio IC circuit is electrically connected with the input end of the control loop, the output end of the detection loop and the output end of the control loop are electrically connected with the input end of the charge-discharge loop, the output end of the charge-discharge loop is electrically connected with the control end of the audio output loop, and POP sound generated by plugging and unplugging of the earphone on the electronic equipment is eliminated.
Description
Technical Field
The utility model relates to an electronic circuit field, in particular to earphone POP sound cancelling circuit and electronic equipment.
Background
With the rapid development of the existing technologies, people pursue higher and higher quality of life in the future, and especially have higher requirements on playing of audio in life. In order to avoid interference of external noise, people usually use an earphone to output audio, but transient impulse impact caused by the moment of circuit operation in the initialization process of the earphone can form transient burst sound, which is generally called POP sound, so that the hearing effect of people is greatly influenced.
In view of this, the present application is proposed.
SUMMERY OF THE UTILITY MODEL
The utility model discloses an earphone POP sound cancelling circuit and electronic equipment aims at eliminating the POP sound that the plug produced on electronic equipment at the earphone.
The utility model discloses a first embodiment provides an earphone POP sound elimination circuit, include: the device comprises an audio IC circuit, an earphone interface loop, an audio output loop, a charging and discharging loop, a control loop and a detection loop;
the audio output end of the audio IC circuit is electrically connected with the audio output end of the interface circuit through an audio output circuit, the detection end of the interface circuit is electrically connected with the input end of the audio IC circuit and the input end of the detection circuit, the signal output end of the audio IC circuit is electrically connected with the input end of the control circuit, the output end of the detection circuit and the output end of the control circuit are electrically connected with the input end of the charge-discharge circuit, and the output end of the charge-discharge circuit is electrically connected with the control end of the audio output circuit.
Preferably, the earphone interface circuit is a normally closed interface circuit.
Preferably, the earphone interface circuit is a normally open interface circuit.
Preferably, the detection loop comprises a first diode;
the negative electrode of the first diode is electrically connected with the detection end of the earphone interface loop, and the positive electrode of the first diode is electrically connected with the input end of the charge-discharge loop.
Preferably, the detection loop comprises a first resistor and a first triode;
the first end of the first resistor is electrically connected with the detection end of the earphone interface loop, the second end of the first resistor is electrically connected with the electrode B of the first triode, the electrode E of the first triode is grounded, and the electrode C of the first triode is electrically connected with the input end of the charging and discharging loop.
Preferably, the control loop comprises: a second resistor and a second triode;
the first end of the second resistor is electrically connected with the signal output end of the audio IC circuit, the second resistor is electrically connected with the pole B of the second triode, the pole C of the second triode is electrically connected with the input end of the charge-discharge loop, and the pole E of the second triode is grounded.
Preferably, the charge and discharge circuit includes: a third resistor, a first capacitor, and a second diode;
the first end of the third resistor is electrically connected with the first end of the first capacitor, the second end of the first capacitor is electrically connected with the anode of the second diode, and the cathode of the second diode is electrically connected with the second end of the third resistor;
the second end of the third resistor is used for being connected with a power supply, the first end of the third resistor is electrically connected with the output end of the control circuit and the output end of the detection circuit, and the anode of the second diode is electrically connected with the control end of the audio output circuit.
Preferably, the audio output circuit comprises: a fourth resistor, a fifth resistor, a third triode, and a fourth triode;
the first end of the fourth resistor and the first end of the fifth resistor are electrically connected with the output end of the charging and discharging loop, the second end of the fourth resistor is electrically connected with the B pole of the third triode, the second end of the fifth resistor is electrically connected with the B pole of the fourth triode, the E pole of the third triode is grounded with the E pole of the fourth triode, the C pole of the third triode is electrically connected with the right sound channel contact of the earphone interface loop, and the C pole of the fourth triode is electrically connected with the left sound channel contact of the earphone interface loop;
the C pole of the third triode is electrically connected with the right sound channel output end of the audio IC circuit, and the C pole of the fourth triode is electrically connected with the left sound channel output end of the audio IC circuit.
A second embodiment of the present invention provides an electronic device, which comprises the above-mentioned any one of the above-mentioned earphone POP sound eliminating circuit.
Based on the utility model provides a pair of earphone POP sound cancelling circuit and electronic equipment, audio frequency IC circuit passes through whether earphone interface return circuit detects has the earphone to insert, when judging that there is the earphone to insert, generates an electric signal extremely control circuit, so that charge-discharge circuit begins to charge, at this moment, audio output return circuit switches on, no signal output when charge-discharge circuit is full of the electricity, audio output return circuit ends, and audio signal passes through the output, through charge-discharge of charge-discharge circuit, eliminates the POP sound that the earphone produced when inserting, very big improvement user's experience.
Drawings
Fig. 1 is a schematic diagram of a POP sound cancellation circuit module of an earphone provided by the present invention;
fig. 2 is a circuit diagram of an embodiment corresponding to the normally closed earphone interface circuit provided by the present invention;
fig. 3 is a normally closed earphone interface circuit provided by the present invention;
fig. 4 is a circuit diagram of an embodiment corresponding to the normally open earphone interface circuit provided by the present invention;
fig. 5 is the utility model provides a normally open earphone interface return circuit.
Detailed Description
To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the drawings of the embodiments of the present invention are combined to clearly and completely describe the technical solutions of the embodiments of the present invention, and obviously, the described embodiments are some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention. Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments of the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to the protection scope of the present invention.
The following detailed description of the embodiments of the present invention is made with reference to the accompanying drawings.
The utility model discloses an earphone POP sound cancelling circuit and electronic equipment aims at eliminating the POP sound that the plug produced on electronic equipment at the earphone.
Referring to fig. 1, a first embodiment of the present invention provides an earphone POP sound cancellation circuit, including: the device comprises an audio IC circuit 2, an earphone interface circuit 5, an audio output circuit 4, a charging and discharging circuit 1, a control circuit 3 and a detection circuit 6;
the audio output end of the audio IC circuit 2 is electrically connected with the audio output end of the interface loop through an audio output loop 4, the detection end of the interface loop is electrically connected with the input end of the audio IC circuit 2 and the input end of a detection loop 6, the signal output end of the audio IC circuit 2 is electrically connected with the input end of a control loop 3, the output end of the detection loop 6 and the output end of the control loop 3 are electrically connected with the input end of the charge and discharge loop 1, and the output end of the charge and discharge loop 1 is electrically connected with the control end of the audio output loop 4.
It should be noted that POP sound is transient impulse impact caused by the moment when an audio circuit works, instant explosion sound can be formed, and when an earphone is used, the audio effect of people is greatly influenced when people often insert and extract the earphone.
In this embodiment, the audio IC circuit 2 detects whether an earphone is connected through the earphone interface circuit 5, and when it is determined that an earphone is connected, generates an electrical signal to the control circuit 3, so that the charge and discharge circuit starts charging, at this time, the audio output circuit 4 is turned on, and no signal is output, and when the charge and discharge circuit is fully charged, the audio output circuit 4 is turned off, and the audio signal is output, and POP sound generated when the earphone is connected is eliminated through charge and discharge of the charge and discharge circuit, thereby greatly improving user experience.
In a possible embodiment of the present invention, the earphone interface circuit 5 is a normally closed interface circuit (as shown in fig. 3).
It should be noted that, when the earphone is not connected, the normally closed interface circuit continuously provides an electrical signal, for example, a 2V signal, to the audio IC circuit 2, and when the earphone is connected, the 2V signal is grounded, and the audio IC circuit 2 cannot receive the electrical signal any more, that is, it is determined that the earphone is connected, and outputs an electrical signal to the control circuit 3.
In a possible embodiment of the present invention, the earphone interface circuit 5 is a normally open interface circuit (as shown in fig. 5).
It should be noted that, in the normally open interface circuit, when the earphone is not connected, the input terminal of the audio IC circuit 2 does not receive an electrical signal, and when the earphone is connected, the input terminal of the audio IC circuit 2 receives an electrical signal, for example, a 2V signal, that is, it is determined that the earphone is connected, and outputs an electrical signal to the control circuit 3.
Referring to fig. 2, in a possible embodiment of the present invention, when the earphone interface circuit 5 is a normally closed interface circuit, the detection circuit 6 may include a first diode D2;
the negative electrode of the first diode D2 is electrically connected to the detection end of the earphone interface loop 5, and the positive electrode of the first diode D2 is electrically connected to the input end of the charge and discharge loop 1.
It should be noted that when the headset is not connected, HPOUT _ JD _ CONN is low (i.e., the cathode of the first diode D2 is low), and when the headset is connected, HPOUT _ JD _ CONN is high (i.e., the cathode of the first diode D2 is high).
Referring to fig. 4, in a possible embodiment of the present invention, when the earphone interface circuit 5 is a normally open interface circuit, the detection circuit 6 includes a first resistor R1 and a first transistor Q1;
the first end of the first resistor R1 is electrically connected with the detection end of the earphone interface loop 5, the second end of the first resistor R1 is electrically connected with the B electrode of the first triode Q1, the E electrode of the first triode Q1 is grounded, and the C electrode of the first triode Q1 is electrically connected with the input end of the charge-discharge loop 1.
It should be noted that, when the earphone is not connected, the HPOUT _ JD _ CONN is high (i.e., the first triode Q1 is turned on) and the earphone does not output a signal, and when the earphone is connected, the HPOUT _ JD _ CONN is low (i.e., the first triode Q1 is turned off).
In a possible embodiment of the invention, the control loop 3 comprises: a second resistor R2 and a second triode Q2;
the first end of the second resistor R2 is electrically connected with the signal output end of the audio IC circuit 2, the second resistor R2 is electrically connected with the pole B of the second triode Q2, the pole C of the second triode Q2 is electrically connected with the input end of the charge-discharge loop 1, and the pole E of the second triode Q2 is grounded.
It should be noted that, when the earphone interface circuit 5 is a normally closed interface circuit or the earphone interface circuit 5 is a normally closed interface circuit, the composition of the control circuit 3 is the same as the working principle, specifically, in this embodiment, when the earphone access is not detected, the SOC _ MUTE is a high level, that is, the second triode Q2 is turned on, and when the earphone access is detected, the SOC _ MUTE is a low level, that is, the second triode Q2 is turned off.
In a possible embodiment of the present invention, the charge and discharge circuit 1 comprises: a third resistor R3, a first capacitor C1 and a second diode D2;
a first end of the third resistor R3 is electrically connected to a first end of the first capacitor C1, a second end of the first capacitor C1 is electrically connected to an anode of the second diode D2, and a cathode of the second diode D2 is electrically connected to a second end of the third resistor R3;
the second end of the third resistor R3 is used for connecting a power supply, the first end of the third resistor R3 is electrically connected to the output end of the control circuit 3 and the output end of the detection circuit 6, and the anode of the second diode D2 is electrically connected to the control end of the audio output circuit 4.
In a possible embodiment of the present invention, the audio output circuit 4 includes: a fourth resistor R4, a fifth resistor R5, a third triode Q3 and a fourth triode Q4;
the first end of the fourth resistor R4 and the first end of the fifth resistor R5 are electrically connected to the output end of the charging and discharging circuit 1, the second end of the fourth resistor R4 is electrically connected to the third triode Q3B, the second end of the fifth resistor R5 is electrically connected to the fourth triode Q4B, the E-pole of the third triode Q3 is grounded to the E-pole of the fourth triode Q4, the C-pole of the third triode Q3 is electrically connected to the right channel contact of the earphone interface circuit 5, and the C-pole of the fourth triode Q4 is electrically connected to the left channel contact of the earphone interface circuit 5;
the C pole of the third triode Q3 is electrically connected to the right channel output terminal of the audio IC circuit 2, and the C pole of the fourth triode Q4 is electrically connected to the left channel output terminal of the audio IC circuit 2.
It should be noted that, when the earphone interface circuit 5 is a normally closed interface circuit:
when the earphone is not connected, the HPOUT _ JD _ CONN is low (namely, the negative electrode of the first diode D2 is low), the SOC _ MUTE is high, the AUDIO _ MUTE1 is high, the third triode Q3 and the fourth triode Q4 are turned on, and the earphone outputs no signal; when the earphone is connected, the HPOUT _ JD _ CONN is high (namely, the negative electrode of the first diode D2 is high), the SOC _ MUTE is low, namely, the second triode Q2 is turned off, the first capacitor C1 starts to charge, at this time, the third triode Q3 and the fourth triode Q4 are turned on, and the LOUT/ROUT has no audio output, and when the first capacitor C1 is fully charged, the third triode Q3 and the fourth triode Q4 are turned on and turned off, and the LOUT/ROUT audio starts to work.
It should be noted that, when the earphone interface circuit 5 is a normally open interface circuit:
when the earphone is not connected, the HPOUT _ JD _ CONN is low (i.e., the first triode Q1 is turned on), the SOC _ MUTE is high, the AUDIO _ MUTE1 is high, the third triode Q3 and the fourth triode Q4 are turned on, and the earphone outputs no signal; when the earphone is connected, the HPOUT _ JD _ CONN is high (namely, the first triode Q1 is turned off), the SOC _ MUTE is pulled down, the circuit starts to operate, the first capacitor C1 starts to charge, at this time, the third triode Q3 and the fourth triode Q4 are turned on, the LOUT/ROUT has no audio output, and when the first capacitor C1 is fully charged, the third triode Q3 and the fourth triode Q4 are turned off, and the LOUT/ROUT audio starts to operate.
It should be noted that the audio output circuit 4 may be composed of a control chip and its peripheral circuits, wherein the model of the control chip may be QFN32_0d4, h0d8, t2d7x2d7, and in other embodiments, other types of chips may also be used, which is not specifically limited herein, but these solutions are all within the protection scope of the present invention,
the utility model discloses an overall thinking does: when the power supply +5VS is powered on, the first capacitor C1 is powered on, at the moment, the third triode Q3 and the fourth triode Q4 are switched off when the first capacitor C1 is charged, and the third triode Q3 and the fourth triode Q4 are switched off. The conducting time of the third triode Q3 and the fourth triode Q4 can be controlled by adjusting the size of the first capacitor C1, the time difference with reasonable design is designed, and POP sound is eliminated. The second diode D2 is used for rapidly discharging the first capacitor C1, wherein the SOC _ MUTE is controlled by the control chip to be output, and is used for controlling when the first capacitor C1 starts to be charged, and controlling the audio output end to generate a spike pulse when the audio Code starts to work, so as to eliminate POP sound generated when the earphone is plugged and unplugged, wherein the signal HPOUT _ JD _ CONN is used for detecting the PIN by the earphone interface.
A second embodiment of the present invention provides an electronic device, which comprises the above-mentioned POP sound canceling circuit.
Based on the utility model provides a pair of earphone POP sound cancelling circuit and electronic equipment, audio frequency IC circuit 2 passes through whether earphone access has been detected in earphone interface return circuit 5, when judging that there is earphone access, generate an electric signal extremely control circuit 3, so that charge-discharge circuit begins to charge, at this moment, audio output return circuit 4 switches on, and no signal output when charge-discharge circuit is full of the electricity, audio output return circuit 4 ends, and audio signal passes through the output, through charge-discharge of charge-discharge circuit, eliminates the POP sound that the earphone produced when the access, very big improvement user's experience.
Above only the utility model discloses a preferred embodiment, the utility model discloses a scope not only limits in above-mentioned embodiment, and the fan belongs to the utility model discloses a technical scheme under the thinking all belongs to the utility model discloses a scope.
Claims (9)
1. A headset POP sound cancellation circuit, comprising: the device comprises an audio IC circuit, an earphone interface loop, an audio output loop, a charging and discharging loop, a control loop and a detection loop;
the audio output end of the audio IC circuit is electrically connected with the audio output end of the interface circuit through an audio output circuit, the detection end of the interface circuit is electrically connected with the input end of the audio IC circuit and the input end of the detection circuit, the signal output end of the audio IC circuit is electrically connected with the input end of the control circuit, the output end of the detection circuit and the output end of the control circuit are electrically connected with the input end of the charge-discharge circuit, and the output end of the charge-discharge circuit is electrically connected with the control end of the audio output circuit.
2. The earphone POP sound cancellation circuit according to claim 1, wherein the earphone interface loop is a normally closed interface loop.
3. The earphone POP sound cancellation circuit of claim 1, wherein the earphone interface loop is a normally open interface loop.
4. A headset POP sound cancellation circuit according to claim 2, wherein the detection circuit comprises a first diode;
the negative electrode of the first diode is electrically connected with the detection end of the earphone interface loop, and the positive electrode of the first diode is electrically connected with the input end of the charge-discharge loop.
5. The POP sound cancellation circuit of claim 3, wherein the detection circuit comprises a first resistor and a first transistor;
the first end of the first resistor is electrically connected with the detection end of the earphone interface loop, the second end of the first resistor is electrically connected with the electrode B of the first triode, the electrode E of the first triode is grounded, and the electrode C of the first triode is electrically connected with the input end of the charging and discharging loop.
6. The headset POP sound cancellation circuit of claim 1, wherein the control loop comprises: a second resistor and a second triode;
the first end of the second resistor is electrically connected with the signal output end of the audio IC circuit, the second resistor is electrically connected with the pole B of the second triode, the pole C of the second triode is electrically connected with the input end of the charge-discharge loop, and the pole E of the second triode is grounded.
7. The POP sound cancellation circuit for an earphone according to claim 1, wherein the charging and discharging loop comprises: a third resistor, a first capacitor, and a second diode;
a first end of the third resistor is electrically connected with a first end of the first capacitor, a second end of the first capacitor is electrically connected with an anode of the second diode, and a cathode of the second diode is electrically connected with a second end of the third resistor;
the second end of the third resistor is used for being connected with a power supply, the first end of the third resistor is electrically connected with the output end of the control circuit and the output end of the detection circuit, and the anode of the second diode is electrically connected with the control end of the audio output circuit.
8. The headset POP sound cancellation circuit of claim 1, wherein the audio output loop comprises: a fourth resistor, a fifth resistor, a third triode and a fourth triode;
the first end of the fourth resistor and the first end of the fifth resistor are electrically connected with the output end of the charging and discharging loop, the second end of the fourth resistor is electrically connected with the B pole of the third triode, the second end of the fifth resistor is electrically connected with the B pole of the fourth triode, the E pole of the third triode is grounded with the E pole of the fourth triode, the C pole of the third triode is electrically connected with the right sound channel contact of the earphone interface loop, and the C pole of the fourth triode is electrically connected with the left sound channel contact of the earphone interface loop;
the C pole of the third triode is electrically connected with the right sound channel output end of the audio IC circuit, and the C pole of the fourth triode is electrically connected with the left sound channel output end of the audio IC circuit.
9. An electronic device, characterized in that it comprises an earphone POP sound cancellation circuit as claimed in any one of claims 1 to 8.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123450125.9U CN217546274U (en) | 2021-12-31 | 2021-12-31 | Earphone POP sound elimination circuit and electronic equipment |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202123450125.9U CN217546274U (en) | 2021-12-31 | 2021-12-31 | Earphone POP sound elimination circuit and electronic equipment |
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| CN217546274U true CN217546274U (en) | 2022-10-04 |
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| CN202123450125.9U Active CN217546274U (en) | 2021-12-31 | 2021-12-31 | Earphone POP sound elimination circuit and electronic equipment |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117278904A (en) * | 2023-11-03 | 2023-12-22 | 荣耀终端有限公司 | Earphone control circuit, earphone control method and electronic equipment |
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2021
- 2021-12-31 CN CN202123450125.9U patent/CN217546274U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117278904A (en) * | 2023-11-03 | 2023-12-22 | 荣耀终端有限公司 | Earphone control circuit, earphone control method and electronic equipment |
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