Pop noise suppression circuit for audio amplifier

Details Pop noise suppression circuit for audio amplifier Pop noise suppression circuit for audio amplifier

1988-03-01

1988-11-29

Laroche, Eugene R.

Amplifiers

Combined with automatic amplifier disabling switch means

330149, H03F 126

Patent

active

047885084

ABSTRACT:
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 audio amplifier. The forcible discharging circuit is operated to forcibly discharge residual charges on the ripple removing capacitor and the negative feedback capacitor only when a power supply of the audio amplifier is turned off.

REFERENCES:
patent: 3992677 (1976-11-01), Tsurushima
patent: 4127743 (1978-11-01), Ozawa et al.
patent: 4371841 (1983-02-01), Eckert et al.
patent: 4636739 (1987-01-01), Dijkmans

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