CN220554099U - Reset key loudspeaker POP sound elimination circuit - Google Patents
Reset key loudspeaker POP sound elimination circuit Download PDFInfo
- Publication number
- CN220554099U CN220554099U CN202322097835.0U CN202322097835U CN220554099U CN 220554099 U CN220554099 U CN 220554099U CN 202322097835 U CN202322097835 U CN 202322097835U CN 220554099 U CN220554099 U CN 220554099U
- Authority
- CN
- China
- Prior art keywords
- mute
- module
- reset
- power amplifier
- resistor
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 230000008030 elimination Effects 0.000 title claims abstract description 16
- 238000003379 elimination reaction Methods 0.000 title claims abstract description 16
- 239000003990 capacitor Substances 0.000 claims description 18
- 238000010586 diagram Methods 0.000 description 4
- 230000005236 sound signal Effects 0.000 description 3
- 238000002955 isolation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
Landscapes
- Amplifiers (AREA)
Abstract
The utility model relates to the technical field of POP sound elimination, in particular to a reset key horn POP sound elimination circuit; the power amplifier MUTE circuit comprises a reset module, an elimination module, a power amplifier MUTE module, a pull-up power supply end VCC and a power amplifier MUTE pin MUTE_AMP, wherein the elimination module is respectively connected with the reset module, the power amplifier MUTE module, the pull-up power supply end VCC and the power amplifier MUTE pin MUTE_AMP, and the reset module is connected with the power amplifier MUTE module; the reset module is used for sending a reset restart signal to the vehicle-mounted entertainment system; the power amplifier mute module is used for receiving a reset restarting signal and resetting and restarting the vehicle-mounted entertainment system; the cancellation module is used for pulling the MUTE pin MUTE_AMP of the power amplifier to 0V to enter a MUTE state; when the reset module is driven, the elimination module is used for enabling the audio power amplifier to enter a MUTE MUTE state, so that POP sound of the loudspeaker when a reset key is pressed is eliminated.
Description
Technical Field
The utility model relates to the technical field of POP sound elimination, in particular to a POP sound elimination circuit of a reset key loudspeaker.
Background
The POP sound of the audio system is mainly caused by the fact that the direct current bias voltage of each path of audio signal suddenly changes, so that spike pulses appear on the automobile horn at the output end. At present, many products of the vehicle-mounted entertainment system are also provided with hard reset keys, and when the system fails and cannot be recovered, the whole vehicle-mounted entertainment system can be reset and restarted by pressing the reset keys; when the reset key is pressed, the entertainment system is reset immediately, at the moment, the entertainment system control unit cannot control the output state of the IO port of the entertainment system control unit, cannot control the audio power supply, cannot set the audio power amplifier to be in the MUTE state, so that the audio circuit power supply is turned off suddenly, a larger voltage abrupt change signal is generated on the audio signal, and the automobile horn emits large POP noise.
Disclosure of Invention
The utility model aims to provide a reset key loudspeaker POP sound eliminating circuit, which solves the problems that an entertainment system control unit cannot control the output state of an IO port of the entertainment system control unit, so that an audio circuit power supply is suddenly turned off, a larger voltage abrupt change signal is generated on an audio signal, and a loudspeaker of an automobile emits large POP noise.
In order to achieve the above purpose, the utility model adopts a reset key loudspeaker POP sound elimination circuit, which comprises a reset module, an elimination module, a power amplifier MUTE module, a pull-up power supply end VCC and a power amplifier MUTE foot MUTE_AMP, wherein the elimination module is respectively connected with the reset module, the power amplifier MUTE module, the pull-up power supply end VCC and the power amplifier MUTE foot MUTE_AMP, and the reset module is connected with the power amplifier MUTE module;
the reset module is used for sending out a reset restart signal for the vehicle-mounted entertainment system;
the power amplifier mute module is used for receiving a reset restarting signal and resetting and restarting the vehicle-mounted entertainment system;
the cancellation module is used for pulling the MUTE pin MUTE_AMP of the power amplifier to 0V to enter a MUTE state.
The eliminating module comprises a triode Q1, a resistor R1 and a resistor R2, wherein the triode Q1 is respectively connected with the resistor R2, the reset module and the resistor R1, the resistor R2 is connected with the pull-up power supply end VCC, and the resistor R1 is connected with the MUTE foot MUTE_AMP of the power amplifier.
The reset module comprises a reset key S1, a diode D1 and a capacitor C1, wherein the reset key S1 is respectively connected with the capacitor C1, the diode D1, the resistor R2 and the triode Q1, and the diode D1 is respectively connected with the power amplifier mute module, the capacitor C1, the resistor R2 and the triode Q1.
The power amplifier MUTE module comprises a resistor R3 and a capacitor C2, wherein the resistor R3 is respectively connected with the reset module, the capacitor C2 and the power amplifier MUTE pin MUTE_AMP.
Wherein, triode Q1 is PNP type triode.
Wherein, the resistor R1 is a current limiting resistor, and the resistor R2 is a bias resistor.
According to the reset key horn POP sound eliminating circuit, the reset module sends out a reset restarting signal for the vehicle-mounted entertainment system; the power amplifier mute module receives a reset restarting signal and resets and restarts the vehicle-mounted entertainment system; the cancellation module pulls the MUTE pin MUTE_AMP of the power amplifier to 0V to enter a MUTE state; when the reset module is driven, the cancellation module is used for enabling the audio power amplifier to enter a MUTE MUTE state, so that POP sound of the loudspeaker when a reset key is pressed is cancelled.
Drawings
In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic diagram of the configuration of the reset key horn POP sound canceling circuit of the present utility model.
Fig. 2 is a schematic circuit diagram of the reset key horn POP sound canceling circuit of the present utility model.
101-reset module, 102-cancel module, 103-power amplifier mute module.
Detailed Description
Referring to fig. 1 and 2, fig. 1 is a schematic diagram of a configuration of a reset key horn POP sound canceling circuit, and fig. 2 is a schematic diagram of a circuit of the reset key horn POP sound canceling circuit.
The utility model provides a reset key loudspeaker POP sound elimination circuit which comprises: the power amplifier MUTE circuit comprises a reset module 101, a cancellation module 102, a power amplifier MUTE module 103, a pull-up power supply end VCC and a power amplifier MUTE pin MUTE_AMP, wherein the cancellation module 102 is respectively connected with the reset module 101, the power amplifier MUTE module 103, the pull-up power supply end VCC and the power amplifier MUTE pin MUTE_AMP, and the reset module 101 is connected with the power amplifier MUTE module 103;
the reset module 101 is used for sending out a reset restart signal to the vehicle-mounted entertainment system;
the power amplifier mute module 103 is used for receiving a reset restart signal and resetting and restarting the vehicle-mounted entertainment system;
the cancellation module 102 is configured to pull the power amplifier MUTE pin mute_amp to 0V to enter a MUTE state.
In this embodiment, the reset module 101 sends out a reset restart signal to the vehicle entertainment system; the power amplifier mute module 103 receives a reset restart signal and resets and restarts the vehicle-mounted entertainment system; the cancellation module 102 pulls the power amplifier MUTE pin mute_amp to 0V to enter a MUTE state; when the reset module 101 is driven, the cancellation module 102 is used to make the audio power amplifier enter a MUTE state, so as to cancel the POP sound of the loudspeaker when the reset key is pressed.
Further, the cancellation module 102 includes a transistor Q1, a resistor R1, and a resistor R2, where the transistor Q1 is connected to the resistor R2, the reset module 101, and the resistor R1, the resistor R2 is connected to the pull-up power supply terminal VCC, and the resistor R1 is connected to the MUTE pin mute_amp of the power amplifier.
Further, the reset module 101 includes a reset key S1, a diode D1, and a capacitor C1, where the reset key S1 is respectively connected to the capacitor C1, the diode D1, the resistor R2, and the transistor Q1, and the diode D1 is respectively connected to the power amplifier mute module 103, the capacitor C1, the resistor R2, and the transistor Q1.
Further, the power amplifier MUTE module 103 includes a resistor R3 and a capacitor C2, where the resistor R3 is connected to the reset module 101, the capacitor C2, and the power amplifier MUTE pin mute_amp, respectively.
In the present embodiment, in the case of the present embodiment,
the capacitor C1 is an anti-interference capacitor, the diode D1 is an isolation diode, the reset key S1 is pressed, the system reset RST_SYS is pulled down through the forward conduction of the diode D1, the vehicle-mounted entertainment system enters a reset state, the reset module 101 is connected to the MUTE pin of the power amplifier through the resistor R3, and the resistor R3 and the capacitor C2 form an RC charge-discharge network (power amplifier chip requirement); meanwhile, the base electrode of the triode Q1 is pulled down to be connected with GND, the triode Q1 is immediately conducted, and the MUTE pin MUTE_AMP of the power amplifier is pulled down to enter a MUTE state through the resistor R1.
Further, the triode Q1 is a PNP triode.
Further, the resistor R1 is a current limiting resistor, and the resistor R2 is a bias resistor.
In this embodiment, the transistor Q1 is a PNP transistor, the resistor R1 is a current limiting resistor, the resistor R2 is a bias resistor, the resistor R1 is used to protect the transistor Q1, prevent the transistor Q1 from conducting an excessive current, and the resistor R2 stabilizes the reset module 101 and the power amplifier mute module 103.
The above disclosure is only a preferred embodiment of the present utility model, and it should be understood that the scope of the utility model is not limited thereto, and those skilled in the art will appreciate that all or part of the procedures described above can be performed according to the equivalent changes of the claims, and still fall within the scope of the present utility model.
Claims (6)
1. A reset key loudspeaker POP sound eliminating circuit is characterized in that,
the power amplifier MUTE circuit comprises a reset module, an elimination module, a power amplifier MUTE module, a pull-up power supply end VCC and a power amplifier MUTE pin MUTE_AMP, wherein the elimination module is respectively connected with the reset module, the power amplifier MUTE module, the pull-up power supply end VCC and the power amplifier MUTE pin MUTE_AMP, and the reset module is connected with the power amplifier MUTE module;
the reset module is used for sending out a reset restart signal for the vehicle-mounted entertainment system;
the power amplifier mute module is used for receiving a reset restarting signal and resetting and restarting the vehicle-mounted entertainment system;
the cancellation module is used for pulling the MUTE pin MUTE_AMP of the power amplifier to 0V to enter a MUTE state.
2. The reset key horn POP sound elimination circuit according to claim 1, wherein,
the eliminating module comprises a triode Q1, a resistor R1 and a resistor R2, wherein the triode Q1 is respectively connected with the resistor R2, the reset module and the resistor R1, the resistor R2 is connected with the pull-up power supply end VCC, and the resistor R1 is connected with the power amplifier MUTE pin MUTE_AMP.
3. The reset key horn POP sound canceling circuit of claim 2 wherein,
the reset module comprises a reset key S1, a diode D1 and a capacitor C1, wherein the reset key S1 is respectively connected with the capacitor C1, the diode D1, the resistor R2 and the triode Q1, and the diode D1 is respectively connected with the power amplifier mute module, the capacitor C1, the resistor R2 and the triode Q1.
4. The reset key horn POP sound canceling circuit of claim 2 wherein,
the power amplifier MUTE module comprises a resistor R3 and a capacitor C2, and the resistor R3 is respectively connected with the reset module, the capacitor C2 and the power amplifier MUTE pin MUTE_AMP.
5. The reset key horn POP sound canceling circuit of claim 2 wherein,
the triode Q1 is a PNP triode.
6. The reset key horn POP sound canceling circuit of claim 2 wherein,
the resistor R1 is a current limiting resistor, and the resistor R2 is a bias resistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322097835.0U CN220554099U (en) | 2023-08-07 | 2023-08-07 | Reset key loudspeaker POP sound elimination circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202322097835.0U CN220554099U (en) | 2023-08-07 | 2023-08-07 | Reset key loudspeaker POP sound elimination circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220554099U true CN220554099U (en) | 2024-03-01 |
Family
ID=90003040
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202322097835.0U Active CN220554099U (en) | 2023-08-07 | 2023-08-07 | Reset key loudspeaker POP sound elimination circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220554099U (en) |
-
2023
- 2023-08-07 CN CN202322097835.0U patent/CN220554099U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2018133155A1 (en) | Audio output circuit, and audio apparatus | |
| CN106878872B (en) | Peripheral circuit for eliminating noise signal | |
| US8335322B2 (en) | Mute control circuit and electronic device using same | |
| US8050428B2 (en) | Audio signal transmission circuit | |
| CN220554099U (en) | Reset key loudspeaker POP sound elimination circuit | |
| JP2609723B2 (en) | Amplifier circuit | |
| US20050100177A1 (en) | Mute circuit of an audio device for suppressing audio signals during transients of power switching | |
| CN106375690B (en) | Plosive eliminating circuit | |
| CN210641061U (en) | All-in-one mainboard with start stereo set silence circuit | |
| CN110677778B (en) | Audio mute control circuit and electronic equipment | |
| JP2770256B2 (en) | Control system | |
| CN113434112A (en) | Audio product on-off and loudspeaker mute protector and control method | |
| US8897429B2 (en) | Communication circuit employing optocoupler | |
| CN113110241B (en) | Electronic equipment and audio control method thereof | |
| CN214014505U (en) | Circuit for eliminating POP sound of audio equipment | |
| CN211352368U (en) | Sound equipment and power amplification system and mute circuit thereof | |
| CN221042803U (en) | Circuit for removing upper and lower electric noise of audio signal | |
| CN215345045U (en) | Squelch circuit with standby playback source function | |
| CN114143615B (en) | Circuit, method and equipment for realizing emergency early warning broadcast in power-off state | |
| JPS6241466Y2 (en) | ||
| CN213986775U (en) | Line fault sampling circuit applying broadcasting system | |
| CN219305014U (en) | Low-power audio amplification chip suppression circuit architecture | |
| CN117526867A (en) | Circuit for removing upper and lower electric noise of audio signal | |
| CN111900933A (en) | Automatic power on/off circuit of power amplifier | |
| CN116388701A (en) | Anti-impact sound circuit for power supply on-off machine |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |