A circuit for eliminating the pop sound when the audio power amplifier is turned off
An audio and circuit technology is applied in the field of circuits for eliminating the POP sound when the audio power amplifier is turned off.
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[0025] see Figure 2 to Figure 4 In order to better understand the technical solution of the present invention, the inventors of the present invention will describe in detail below through specific embodiments in conjunction with the accompanying drawings:
[0026] see figure 2 and image 3 , an embodiment of the present invention, a circuit for eliminating the POP sound of an audio power amplifier shutdown, connected to an audio system, the audio system includes a power supply 1, a DC / DC converter 2, a main chip 3 and a pair of audio power amplifiers 4, a power supply 1, a DC / DC The DC converter 2 is connected to the main chip 3 in turn, the voltage VDD of the power supply 1 is stepped down by the DC / DC converter 2 to supply power to the main chip 3, each audio power amplifier 4 is connected to the main chip 3, and each audio power amplifier 4 is also connected to the power supply 1 connected. The DC / DC converter 2 can be replaced by an LDO voltage regulator, the power su...
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