Traditional Culture Encyclopedia - Traditional culture - How to improve the conversion rate of audio power amplifier?
How to improve the conversion rate of audio power amplifier?
The limit audio that the human ear can hear is about 22 kHz, so it is of no practical significance to improve the band-pass frequency of the power amplifier.
The key is to reduce the distortion of the amplifier. Reducing distortion can be considered from the following aspects:
Change the input capacitance to the input of the photoelectric coupler.
The pre-stage voltage amplification adopts double differential amplification.
The post-stage power amplifier adopts four-tube bridge amplifier circuit to avoid zero-crossing distortion.
Capacitors with high performance and low loss, such as tantalum capacitors, ceramic capacitors and metallized polyethylene capacitors, must be used.
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