Is a
Patent attributes
Current Assignee
Patent Jurisdiction
Patent Number
Date of Patent
November 7, 2006
Patent Application Number
10514178
Date Filed
May 1, 2003
Patent Primary Examiner
Patent abstract
A class D power amplifier (1) switches a power supply voltage VDD at high-speed in response to an input digital audio signal Pin to 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.
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