这是我做的可变程放大器，放大信号用，希望对大家有帮助。

This is my way to do variable amplifier, signal amplification, and hope to help everyone.

youdao

这是我做的可变程放大器，放大信号用，希望对大家有帮助。

This is my way to do variable amplifier, signal amplification, and hope to help everyone.

youdao