CN112954546A - Control circuit, module and terminal equipment for removing plosive by electrifying and powering off - Google Patents
Control circuit, module and terminal equipment for removing plosive by electrifying and powering off Download PDFInfo
- Publication number
- CN112954546A CN112954546A CN202110137717.0A CN202110137717A CN112954546A CN 112954546 A CN112954546 A CN 112954546A CN 202110137717 A CN202110137717 A CN 202110137717A CN 112954546 A CN112954546 A CN 112954546A
- Authority
- CN
- China
- Prior art keywords
- resistor
- triode
- power
- diode
- control circuit
- 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.)
- Pending
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 19
- 238000004200 deflagration Methods 0.000 claims 3
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000008859 change Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000005611 electricity Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000001629 suppression Effects 0.000 description 1
Images
Classifications
-
- 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
Landscapes
- Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Acoustics & Sound (AREA)
- Signal Processing (AREA)
- Amplifiers (AREA)
Abstract
The invention provides a control circuit, a module and terminal equipment for removing plosive by electrifying and powering down, wherein the control circuit comprises: the +12V voltage is divided by resistors RA2 and RA3, capacitors CA1 and CA3 are charged through a diode DA1, a resistor RA4 is connected in series with the base of a triode QA1, RA7 is a pull-up resistor to ensure that the level of an IO port is high when power is on, and RA6 is connected in series between the base of a triode QA2 and the diode DA 2. The PD network is the silence control pin of power amplifier chip, and power amplifier chip is in the silence mode during the low level, and the power amplifier can not normally work, and loudspeaker no sound output, and the power amplifier is in normal operating mode during the high level, and loudspeaker normally output sound, RA1 and RA5 resistance are the pull-up resistance of PD, divide 5V voltage partial pressure to 3.3V. The invention has simple circuit and low cost. The circuit has wide application range and can be compatible with circuits of various power supply modes.
Description
Technical Field
The invention relates to the technical field of power amplifier control, in particular to a control circuit, a module and terminal equipment for removing plosive by electrifying and powering down.
Background
Most of the present electronic products have the audio function, wherein the control to the audio is very important, especially to the control of power amplifier when getting up and down, because there is the problem of getting up and down the electricity chronogenesis, the input of power amplifier can have the sudden change of level, and the power amplifier outputs unusual signal and leads to loudspeaker to have the plosive problem, can be very bad to the experience of product, can cause the visitor to complain, and the serious still can destroy the product.
The prior art with chinese patent application publication No. CN202068549U entitled "power-on and power-off mute integrated control circuit" only includes a mute control circuit when hardware is powered off, and does not consider mute suppression when power is powered on. The circuit energy storage capacitor disclosed in the above publication uses an electrolytic capacitor, which increases the area of the PCB and is not favorable for the layout of the PCB. The mute pin is added with 1 capacitor, so that the mute pin discharges slowly when the power failure occurs, the level of the mute pin cannot be pulled down in time when the power failure occurs, and the power failure plosive problem may exist.
Disclosure of Invention
The invention aims to provide a control circuit, a module and terminal equipment for removing plosives by powering on and powering off, which can solve the problems of power-on and power-off plosives in the prior art.
The purpose of the invention is realized by the following technical scheme:
in a first aspect, the invention provides a control circuit for removing plosive by powering on and powering off, which comprises a resistor RA1, a resistor RA2, a resistor RA3, a resistor RA4, a resistor RA5, a resistor RA6, a resistor RA7, a resistor RA8, a capacitor CA1, a capacitor CA3, a triode QA1, a triode QA2 and a Schottky diode DA 1; one end of the resistor RA3 and one end of the resistor RA4 are connected with a first voltage, the other end of the resistor RA3 is grounded through the resistor RA2, and the other end of the resistor RA3 is connected with the anode of the diode DA 1; the cathode of the diode DA1 is connected with the emitter of the triode QA 1; the capacitor CA1 and the capacitor CA3 are respectively connected between the emitter of the triode QA1 and the ground; the other end of the resistor RA4 is connected with the base electrode of the triode QA 1; the collector of the triode QA1 is connected with one anode of the Schottky diode DA 1; the second voltage is input to the other anode of the Schottky diode DA1 after passing through the resistor RA 7; the other anode of the base diode DA1 is connected to one IO port of the control chip, and the cathode of the base diode DA1 is connected with one end of the resistor RA6 and one end of the resistor RA 8; the other end of the resistor RA8 is grounded; the other end of the resistor RA6 is connected with the base electrode of the triode QA2, the emitter electrode of the triode QA2 is grounded, and the collector electrode of the triode QA2 is connected with one end of the resistor RA1, one end of the resistor RA5 and a mute control pin of the power amplifier chip; the other end of the resistor RA1 is connected with a third voltage; the other end of resistor RA5 is connected to ground.
In a second aspect, the present invention provides a control module for removing pop noise by powering on and powering off, including the above control circuit for removing pop noise by powering on and powering off.
In a third aspect, the present invention provides a terminal device, including the above-mentioned control module for removing plosive by powering on and powering off.
Compared with the power-on and power-off mute integrated control circuit in the prior art, the power-on and power-off mute integrated control circuit and the module and the terminal device have higher circuit flexibility. The power-off detection control circuit and the main control circuit are not interfered with each other. The time node of the software mute can be controlled. The circuit is simple and the cost is low. The circuit has wide application range and can be compatible with circuits of various power supply modes.
Drawings
FIG. 1 is a schematic circuit diagram of a power-up de-plosive control circuit according to the present invention.
Detailed Description
The embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
The embodiments of the present disclosure are described below with specific examples, and other advantages and effects of the present disclosure will be readily apparent to those skilled in the art from the disclosure in the specification. It is to be understood that the described embodiments are merely illustrative of some, and not restrictive, of the embodiments of the disclosure. The disclosure may be embodied or carried out in various other specific embodiments, and various modifications and changes may be made in the details within the description without departing from the spirit of the disclosure. It is to be noted that the features in the following embodiments and examples may be combined with each other without conflict. All other embodiments, which can be derived by a person skilled in the art from the embodiments disclosed herein without making any creative effort, shall fall within the protection scope of the present disclosure.
The control circuit for removing plosive by electrifying and powering comprises a resistor RA1, a resistor RA2, a resistor RA3, a resistor RA4, a resistor RA5, a resistor RA6, a resistor RA7, a resistor RA8, a capacitor CA1, a capacitor CA3, a triode QA1, a triode QA2 and a Schottky diode DA1, as shown in figure 1. One end of the resistor RA3 and one end of the resistor RA4 are connected with +12V _ Normal voltage, the other end of the resistor RA3 is grounded through the resistor RA2, the other end of the resistor RA3 is connected with the anode of the diode DA1, and the cathode of the diode DA1 is connected with the emitter of the triode QA 1. The capacitor CA1 and the capacitor CA3 are respectively connected between the emitter of the transistor QA1 and ground. The other end of the resistor RA4 is connected to the base of the transistor QA 1. The collector of the transistor QA1 is connected to an anode of a schottky diode DA 1. The +3.3V _ standby voltage passes through the resistor RA7 and then is connected with the other anode of the base diode DA 1. The other anode of the schottky diode DA1 is connected to one IO port AMP _ MUTE of the control chip. The cathode of the schottky diode DA1 is connected to one end of the resistor RA6 and one end of the resistor RA 8. The other end of resistor RA8 is connected to ground. The other end of the resistor RA6 is connected with the base electrode of the triode QA2, the emitter electrode of the triode QA2 is grounded, and the collector electrode of the triode QA2 is connected with one end of the resistor RA1, one end of the resistor RA5 and a mute control pin of the power amplifier chip. The other end of resistor RA1 is connected to a +5V _ Normal voltage. The other end of resistor RA5 is connected to ground.
The invention is designed according to the actual control logic requirement of the product, the +12V _ Normal, +5V _ Normal and +3.3V _ standby are power supplies, the +3.3V _ standby is the power supply which is firstly powered up, and is secondly the power supply which is +12V _ Normal and +5V _ Normal, +12V _ Normal is divided by resistors RA2 and RA3, then capacitors CA1 and CA3 are charged through a diode DA1, because of the reverse cut-off characteristic of the diode DA1, the capacitor is always kept at the set voltage value after being fully charged, a resistor RA4 is connected in series with the base of a triode QA1, AMP _ MUTE is an IO port of a control chip, RA7 is a pull-up resistor to ensure that the IO port level is high level when powered up, and RA6 is connected in series between the base of the triode QA2 and a diode DA2 (schottky diode). The PD network is the silence control pin of power amplifier chip, and power amplifier chip is in the silence mode during the low level, and the power amplifier can not normally work, and loudspeaker no sound output, and the power amplifier is in normal operating mode during the high level, and loudspeaker normally output sound, RA1 and RA5 resistance are the pull-up resistance of PD, divide 5V voltage partial pressure to 3.3V.
The working process of the circuit is as follows:
1. when the power supply is powered on, the +12V _ Normal power supply charges the capacitors CA1 and CA3, at the moment, the base voltage of the triode QA1 is higher than the emitter voltage, the triode is in a cut-off state, the 2 nd pin of the diode DA2 is in a high level because the initial state of the pull-up resistor RA7 is high level, the 3 rd pin level of the diode DA2 is about 3V, the base voltage is applied to the base of the triode QA2 through the resistor RA6, at the moment, the triode QA2 is conducted, the PD network voltage is 0V, the power amplifier is in a MUTE state, when the main control chip completes initialization, the AMP _ MUTE network is pulled down after the system is started, the triode QA2 enters the cut-off state, the level of the PD network becomes high level, the power amplifier de-MUTE operation is completed, and the.
When the power is off, when the +12V _ Normal power voltage is reduced to a set voltage value, the emitter voltage of the triode QA1 is higher than the base voltage, the triode QA1 is conducted, the collector voltage of the triode QA1 is equal to the emitter voltage, the base voltage of the triode QA2 is applied to the diode DA2 and the resistor RA6, the triode is in a conduction state, the voltage of the PD network is reduced to 0V, meanwhile, the voltage on the PD network can be accelerated to drop to 0V due to the existence of the resistor RA5, the power amplifier is enabled to enter a mute mode, and therefore the problem that the loudspeaker has a popping sound when the power is off is avoided.
The invention provides a control module for removing plosive by electrifying and powering off, which comprises the control circuit for removing the plosive by electrifying and powering off.
The invention provides terminal equipment which comprises the control module for removing the plosive by electrifying and powering off.
In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; may be mechanically coupled, may be electrically coupled or may be in communication with each other; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
The above description is for the purpose of illustrating embodiments of the invention and is not intended to limit the invention, and it will be apparent to those skilled in the art that any modification, equivalent replacement, or improvement made without departing from the spirit and principle of the invention shall fall within the protection scope of the invention.
Claims (3)
1. A control circuit for removing plosive by electrifying and powering off is characterized by comprising a resistor RA1, a resistor RA2, a resistor RA3, a resistor RA4, a resistor RA5, a resistor RA6, a resistor RA7, a resistor RA8, a capacitor CA1, a capacitor CA3, a triode QA1, a triode QA2 and a Schottky diode DA 1; one end of the resistor RA3 and one end of the resistor RA4 are connected with a first voltage, the other end of the resistor RA3 is grounded through the resistor RA2, and the other end of the resistor RA3 is connected with the anode of the diode DA 1; the cathode of the diode DA1 is connected with the emitter of the triode QA 1; the capacitor CA1 and the capacitor CA3 are respectively connected between the emitter of the triode QA1 and the ground; the other end of the resistor RA4 is connected with the base electrode of the triode QA 1; the collector of the triode QA1 is connected with one anode of the Schottky diode DA 1; the second voltage is input to the other anode of the Schottky diode DA1 after passing through the resistor RA 7; the other anode of the base diode DA1 is connected to one IO port of the control chip, and the cathode of the base diode DA1 is connected with one end of the resistor RA6 and one end of the resistor RA 8; the other end of the resistor RA8 is grounded; the other end of the resistor RA6 is connected with the base electrode of the triode QA2, the emitter electrode of the triode QA2 is grounded, and the collector electrode of the triode QA2 is connected with one end of the resistor RA1, one end of the resistor RA5 and a mute control pin of the power amplifier chip; the other end of the resistor RA1 is connected with a third voltage; the other end of resistor RA5 is connected to ground.
2. A power-on and power-off deflagration sound control module comprising the power-on and power-off deflagration sound control circuit of claim 1.
3. A terminal device comprising the power-on electrical deflagration tone control module of claim 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110137717.0A CN112954546A (en) | 2021-02-01 | 2021-02-01 | Control circuit, module and terminal equipment for removing plosive by electrifying and powering off |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110137717.0A CN112954546A (en) | 2021-02-01 | 2021-02-01 | Control circuit, module and terminal equipment for removing plosive by electrifying and powering off |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112954546A true CN112954546A (en) | 2021-06-11 |
Family
ID=76240929
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110137717.0A Pending CN112954546A (en) | 2021-02-01 | 2021-02-01 | Control circuit, module and terminal equipment for removing plosive by electrifying and powering off |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112954546A (en) |
Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200966099Y (en) * | 2006-10-17 | 2007-10-24 | 深圳市同洲电子股份有限公司 | Mute circuit for set-top box |
| CN102946578A (en) * | 2012-11-26 | 2013-02-27 | 成都锐成芯微科技有限责任公司 | Amplifier free of POP sound during on and off for audio headphone |
| CN203377994U (en) * | 2013-07-11 | 2014-01-01 | 四川九州电子科技股份有限公司 | Circuit structure for eliminating plosive sound of starting and shutdown of set-top box |
| CN203661276U (en) * | 2013-12-24 | 2014-06-18 | 广州视源电子科技股份有限公司 | Mute control circuit |
| CN103974171A (en) * | 2014-05-28 | 2014-08-06 | 上海贝岭股份有限公司 | Plosive cancelling circuit |
| CN205666814U (en) * | 2016-06-13 | 2016-10-26 | 浪潮集团有限公司 | Circuit for eliminating Speaker Pop sound |
| CN206313977U (en) * | 2016-12-19 | 2017-07-07 | 广州视源电子科技股份有限公司 | Plosive eliminating device and power amplifier circuit |
| CN107396243A (en) * | 2017-08-10 | 2017-11-24 | 惠州Tcl移动通信有限公司 | A kind of switching on and shutting down muting control circuit, control method and audio frequency apparatus |
| CN111263268A (en) * | 2020-01-15 | 2020-06-09 | 深圳市创维群欣安防科技股份有限公司 | Loudspeaker POP sound cancelling circuit and electronic product during outage |
| CN111294700A (en) * | 2018-12-29 | 2020-06-16 | 展讯通信（深圳）有限公司 | POP noise suppression device, power amplifier and electronic equipment |
| CN211321491U (en) * | 2019-12-27 | 2020-08-21 | 东莞东城迪芬尼电声科技有限公司 | Circuit for eliminating power-down noise of audio equipment |
-
2021
- 2021-02-01 CN CN202110137717.0A patent/CN112954546A/en active Pending
Patent Citations (11)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN200966099Y (en) * | 2006-10-17 | 2007-10-24 | 深圳市同洲电子股份有限公司 | Mute circuit for set-top box |
| CN102946578A (en) * | 2012-11-26 | 2013-02-27 | 成都锐成芯微科技有限责任公司 | Amplifier free of POP sound during on and off for audio headphone |
| CN203377994U (en) * | 2013-07-11 | 2014-01-01 | 四川九州电子科技股份有限公司 | Circuit structure for eliminating plosive sound of starting and shutdown of set-top box |
| CN203661276U (en) * | 2013-12-24 | 2014-06-18 | 广州视源电子科技股份有限公司 | Mute control circuit |
| CN103974171A (en) * | 2014-05-28 | 2014-08-06 | 上海贝岭股份有限公司 | Plosive cancelling circuit |
| CN205666814U (en) * | 2016-06-13 | 2016-10-26 | 浪潮集团有限公司 | Circuit for eliminating Speaker Pop sound |
| CN206313977U (en) * | 2016-12-19 | 2017-07-07 | 广州视源电子科技股份有限公司 | Plosive eliminating device and power amplifier circuit |
| CN107396243A (en) * | 2017-08-10 | 2017-11-24 | 惠州Tcl移动通信有限公司 | A kind of switching on and shutting down muting control circuit, control method and audio frequency apparatus |
| CN111294700A (en) * | 2018-12-29 | 2020-06-16 | 展讯通信（深圳）有限公司 | POP noise suppression device, power amplifier and electronic equipment |
| CN211321491U (en) * | 2019-12-27 | 2020-08-21 | 东莞东城迪芬尼电声科技有限公司 | Circuit for eliminating power-down noise of audio equipment |
| CN111263268A (en) * | 2020-01-15 | 2020-06-09 | 深圳市创维群欣安防科技股份有限公司 | Loudspeaker POP sound cancelling circuit and electronic product during outage |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JP3742474B2 (en) | Computer system having an audio device | |
| US8199930B2 (en) | Pop noise suppression apparatus and audio output system utilizing the same | |
| CN106878872B (en) | Peripheral circuit for eliminating noise signal | |
| US20090106565A1 (en) | Power control apparatus for motherboard | |
| CN111930657A (en) | Connection circuit, control method of connection circuit, and connection device | |
| CN207184795U (en) | Mute circuit and audio frequency apparatus | |
| CN101111094B (en) | Noise preventing module and its public address set | |
| CN112954546A (en) | Control circuit, module and terminal equipment for removing plosive by electrifying and powering off | |
| CN216437462U (en) | Switch control circuit and far-field voice system | |
| US20100275041A1 (en) | Computer power supply and power status signal generating circuit thereof | |
| CN113515159B (en) | Self-adaptive low-power-consumption high-voltage holding system and application | |
| CN112234966A (en) | Reset circuit | |
| CN110324770B (en) | Microphone, integrated circuit thereof and electronic equipment | |
| CN110290446B (en) | Mute circuit capable of preventing popping when being rapidly turned on and turned off | |
| CN209914063U (en) | Microphone, integrated circuit thereof and electronic equipment | |
| CN113050786A (en) | Standby system and display equipment | |
| CN103369426A (en) | Popping-proof circuit | |
| CN213585203U (en) | Single board and communication device | |
| CN211531282U (en) | Power amplification circuit and power amplification chip | |
| CN210442803U (en) | Noise reducing device | |
| CN211296708U (en) | Circuit for multiplexing GPIO interface | |
| CN113115180B (en) | Plosive removing device of audio output end and audio equipment | |
| CN221056922U (en) | Hardware system for remote starting up of network | |
| EP4030583A1 (en) | Circuit module and electronic device | |
| CN219780002U (en) | Power supply system and slot addressing circuit |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information |
Address after: Room 238, room 406, No.1, Yichuang street, Huangpu District, Guangzhou, Guangdong 510000 Applicant after: Guangzhou langguo Electronic Technology Co.,Ltd. Address before: Room 238, room 406, No.1, Yichuang street, Huangpu District, Guangzhou, Guangdong 510000 Applicant before: GUANGZHOU LANGO ELECTRONIC SCIENCE & TECHNOLOGY Co.,Ltd. |
|
| CB02 | Change of applicant information | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210611 |
|
| RJ01 | Rejection of invention patent application after publication |