Patent ID: 7492141

Claim:
A resonant inverter comprising: a first driver and a second driver for driving a first switching device and a second switching device, respectively; a dead time generator, coupled to the first driver and configured to generate a first drive signal to drive the first driver, and coupled to the second driver and configured to generate a second drive signal to drive the second driver; a current-controlled oscillator, coupled to the dead time generator, configured to supply an output clock having a frequency based on a mirror current, input to the current-controlled oscillator; a current mirror for supplying the first current to the current-controlled oscillator in an amount proportional to a second current flowing toward an external resistor; a track/hold circuit, included in the current mirror, configured to facilitate the generation of the second current, wherein the second current is substantially equal to an amount of the second current supplied before a variation in the amount of the second current, during a transition of an output signal between the first and second switching devices; and a controller, coupled to the track and hold circuit for receiving the first and second drive signals, and generating a control signal adapted to operate the track/hold circuit.