MUTE CIRCUIT

摘要

The circuit controls a muting operation according to the on/off states of a mute switch by connecting the mute switch (SW1) to a constant voltage output terminal (P1) having an oscillation preventing capacitor (C1). The circuit comprises a constant voltage circuit (2) receiving a predetermined voltage from a constant voltage generator (1), the capacitor (C1), a current supply circuit (3) for supplying constant current according to the constant voltage, and a MUTE unit (4) for receiving the constant current to perform a mute operation according to a mute control signal.