Power amplification device

Details Power amplification device Power amplification device

2006-11-07

2006-11-07

Pascal, Robert (Department: 2817)

Amplifiers

Modulator-demodulator-type amplifier

C330S12400D

Reexamination Certificate

active

07132884

ABSTRACT:
A class D power amplifier (1) switches a power supply voltage VDDat high-speed in response to an input digital audio signal Pinto power-amplify the digital audio signal Pin, and supplies a speaker (2) with the amplified signal. In the case of being incorporated in an AM receiver formed integrally with an AM tuner (3) for receiving AM broadcasts, the class D power amplifier (1) can reduces influence of reception interference with respect to the AM tuner (3). As a result, it is possible to provide a power amplifier that can suppress unnecessary radiation to reduce reception interference with respect to the tuner, not by changing a carrier frequency, but by controlling the drive signal generation systems.

REFERENCES:
patent: 6593806 (2003-07-01), Melanson
patent: 1 014 566 (2000-06-01), None
patent: 7-15248 (1995-01-01), None
patent: 2000-196376 (2000-07-01), None
European Search Report—Sony Corporation

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