Equipment and method for eliminating detonation
A sound and sound processing technology, which is applied to the components of the amplifier device, the layout of the amplifier protection circuit, and electrical components, etc., can solve the problems of relay failure rate, poor contact of shrapnel metal contacts, and high cost of relays, etc.
Inactive Publication Date: 2007-04-25
CORETRONIC
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Problems solved by technology
[0004] However, because the relay 13 mainly uses metal shrapnel to achieve the purpose of conduction, the metal shrapnel will oxidize with the increase of use time, resulting in poor contact of the metal contacts of the shrapnel, thus causing the problem of relay failure rate. In addition, because the speaker is made of large Current drive, the selected matching relay needs to be large, so the cost of the relay is also more expensive
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[0014] In order to achieve the above object, the present invention adopts technical means and effects thereof, a preferred embodiment is given hereby, and illustrated with accompanying drawings.
[0015] Referring to Fig. 2, the device 20 for eliminating knocking noise of the present invention mainly includes antenna 21, tuner 22, sound processing circuit 23, power supply unit 24, voltage monitoring circuit 25, sound switch 26, microprocessor 27, sound amplifier 28. Speaker 29. Wherein after antenna 21 receives the high-frequency audio-visual signal, the audio-visual signal is converted into an intermediate frequency signal receivable by the TV through the tuner 22 or a video baseband signal is demodulated, and then output to the sound processing circuit 23 for the tuner 22 The output signal is divided into stereo and mono, so that the sound signal has multiple modes to choose from, and then the sound signal is amplified by the sound amplifier 28, and then output to the speake...
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The invention is a fulmination sound eliminating device and method, where the device includes a power supply unit, a voltage monitoring circuit at the output end of the power supply unit, a sound amplifier at the end of the voltage monitoring circuit and a horn at the end of the sound amplifier. As the power supply unit inputs voltage, the voltage monitoring circuit detects and compares input voltage value with set value to output a signal so as to control the sound amplifier; as the input voltage is less than the set value, the voltage monitoring circuit outputs a control signal to turn off the sound amplifier; and as the input voltage is greater than the set value, the voltage monitoring circuit outputs a control signal to turn on the sound amplifier and the sound amplifier can amplify the sound signal and outputs the sound through the horn.
Description
technical field [0001] The invention relates to a device and method for eliminating knocking sound, in particular to a device and method for eliminating knocking sound of a video device. Background technique [0002] General video devices often use speakers as sound output. Once the user does not shut down the machine according to the normal boot procedure, such as turning off the power directly, it will cause noise due to the instantaneous change of the power supply of the sound processing circuit or the sound amplifier circuit. The loudspeaker is output through the speaker, which will frighten the user and seriously reduce the quality of hearing. [0003] Please refer to FIG. 1 , the existing video device 10 is to solve the above-mentioned problem of popping sound, and its component configuration mainly includes a sound processing module 11 , a sound amplifier 12 , a relay 13 and a speaker 14 . Among them, after the sound signal is input into the sound processing module 1...
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IPC IPC(8): H03F1/00H03F1/52
Inventor 李永亮胡以能
Owner CORETRONIC