In an audio amplifier, a ripple removing filter capacitor is connected to a ripple terminal, and a negative feedback capacitor is connected to a negative feedback terminal. A pop noise suppression circuit of the amplifier has a forcible discharging circuit which is not operated in a steady state of the...http://www.google.de/patents/US4788508?utm_source=gb-gplus-sharePatent US4788508 - Pop noise suppression circuit for audio amplifier
