Audio power amplifier with improved low frequency performance
A power amplifier, audio power technology, applied in the direction of low-frequency amplifiers, etc., can solve the problem of high price
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[0038] The present invention will be further described below in conjunction with the accompanying drawings and embodiments.
[0039] image 3 The circuit structure of the audio power amplifier device with improved low frequency performance of the present invention is shown. See image 3 , the audio power amplifier device receives the input signal Vin provided by the front stage, amplifies or attenuates the input signal Vin, and the obtained output signal is loaded on the speaker 109 .
[0040]The input signal Vin is applied to the inverting input terminal of the power amplifier module 101 through the resistor R1 , and the common-mode reference voltage Vcm is applied to the non-inverting input terminal of the power amplifier module 101 . The power amplifier module 101 adopts a single power supply mode and is powered by the power supply VCC. One output signal Vx of the power amplifier module 101 is fed back to the inverting input terminal of the amplifier through the resistor...
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