Mute circuit and electronic equipment
A technology for mute circuits and electronic equipment, applied to transducer circuits, electrical components, sensors, etc., can solve the problems of high cost, many components, and high parameter adjustment requirements, and achieve low cost, improved versatility, and parameter adjustment less demanding effect
Inactive Publication Date: 2017-12-01
HUAWEI TECH CO LTD
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Problems solved by technology
[0006] The invention provides a mute circuit and electronic equipment, which solves the complicated circuit caused by the need for the mute circuit to detect the power-on and power-off processes through the detection sub-circuit, so that more components are needed, the cost is high, and the parameter adjustment requirements higher question
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[0042] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.
[0043] figure 2 What is shown is a mute circuit provided by the embodiment of the present invention. The mute circuit can be applied to electronic equipment containing audio circuits, such as figure 2 As shown, the mute circuit may include: a main control chip 101 and a mute control sub-circuit 102 .
[0044] Wherein, the main control chip 101 includes a mute control pin 1011 .
[0045] The mute control pin 1011 is connected to the first end of the mute contro...
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The invention discloses a mute circuit and electronic equipment, relates to the technical field of circuit design, and solves the problems of high number of the required parts and components, high cost and high requirement of parameter adjustment caused by circuit complexity due to the fact that the mute circuit requires to detect the power-on and power-off process through the detection sub-circuit. The concrete scheme is that the mute circuit is applied to the electronic equipment including an audio circuit. The mute circuit comprises a master control chip and a mute control sub-circuit. The master control chip comprises a mute control pin which is connected with the first end of the mute control sub-circuit. The second end of the mute control sub-circuit is connected with the audio circuit. When the electronic equipment is powered on, the master control chip controls the mute control pin to be continuously in the first state so that the audio circuit is enabled to be in the mute state through the mute control sub-circuit. When the electronic equipment is powered off, the master control chip controls the mute control pin to be in the second state so that the audio circuit is enabled to be in the mute state through the mute control sub-circuit.
Description
technical field [0001] The invention relates to the technical field of circuit design, in particular to a mute circuit and electronic equipment. Background technique [0002] With the development of society, audio and video equipment such as TV sets and set-top boxes are becoming more and more popular in people's daily life. Among them, in the process of switching on and off the audio and video equipment, POP sounds are usually generated due to overshoot voltage. POP sound refers to the popping sound produced by the transient impact of the audio circuit of the audio and video equipment at the moment of power-on and power-off. POP sound will not only affect the quality of audio and video equipment, but also may damage the components of audio and video equipment in severe cases. For example, excessive overshoot voltage may damage the speakers of audio and video equipment. Therefore, a mute circuit is needed to suppress the POP sound generated by the audio circuit during power...
Claims
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IPC IPC(8): H04R3/00
CPCH04R3/00H04R2430/00
Inventor 张宏立邹万俊闵言灿
Owner HUAWEI TECH CO LTD