A digital power amplifier has first and second switches, between a high potential power line and a low potential power line, which operate complementarily. When switching an ON switch, dead time is provided to control power to a low-pass filter. In a switching section, the first switch, a first coil,...http://www.google.com/patents/US6992527?utm_source=gb-gplus-sharePatent US6992527 - Digital power amplifier
