Patent ID: 6710653
Filing Date: 2004-03-23
Classification: H03F

Abstract:
A D-class power amplifier for supplying an amplification signal obtained by amplifying two input signals to two loads which are mutually connected at one end of each load, comprising:two D-class power amplifying circuits having output terminals connected to the other ends of said two loads, respectively; a preprocessing circuit for performing a predetermined preprocess to said two input signals and supplying the processed signals to said two D-class power amplifying circuits; and a power supply circuit for supplying an electric power to said two D-class power amplifying circuits, wherein one of said two D-class power amplifying circuits executes an anti-phase power amplifying process and the other of said two D-class power amplifying circuits executes an in-phase power amplifying process, said preprocessing circuit executes a process for equalizing amplitudes of the two input signals in a low frequency band, and a node of said two loads is connected to a neutral potential point of an output voltage from said power supply circuit.