Panasonic Corporation

Panasonic Intellectual Property Management Co., Ltd.

Rintaro Sukegawa

Seigo Ozaki

A supply voltage controllerincludes a simplified envelope creating unitthat calculates an envelope of an input audio signal according to an input audio signal from an external device, creates a supply voltage control signal so that a waveform of the supply voltage control signal follows a waveform of the envelope, and outputs the supply voltage control signal to a voltage variable power supplya constant time before the input audio signal is amplified by the amplifier. Accordingly, an amplifying device can be provided which can reduce the distortion of the output signal not depending on a change in the slew rate of the voltage variable power supplyand suppress the deterioration of power efficiency.

Growing community of inventors

Kanagawa, Japan

Rintaro Sukegawa