Patent ID: 7180758
Filing Date: 2007-02-20
Classification: H02H,H02M,H03F

Abstract:
1. A power supply circuit for supplying alternating power to a load, comprising: a source of direct current (DC) voltage; a class E amplifier, the class E amplifier receiving the DC input voltage and generating an alternating current (AC) output signal; a first harmonic filter at the output of the amplifier, the first harmonic filter filtering out predetermined harmonic components of the AC signal to generate a filtered AC signal; and an output circuit at the output of the first harmonic filter for receiving the filtered AC signal and feeding the filtered AC signal to a load, wherein the output circuit includes a rectifier connected relative to a point in the output circuit such that if the voltage at the point exceeds a predetermined threshold, the rectifier conducts to cause at least one of voltage and current to return to the source of DC voltage and clamps the point to a predetermined voltage.