AUDIOAMPLIFYING CIRCUIT AND ITS OPERATIONAL METHOD

摘要

PURPOSE: To provide a control circuit and an operating method by which the efficiency, performance, and power of an audio amplifier circuit can be improved. CONSTITUTION: An audio amplifier circuit 32 improves the efficiency, performance, and power of a loudspeaker system. The circuit 32 incorporates such a discriminating differential amplifier 52 that can sense a motional voltage from the movable coil 34 of a loudspeaker 36. The output signal of the amplifier 52 is coupled with a deriving voltage by means of the circuit 32 and processed to a corrected voltage applied upon the input of the loudspeaker 36.