Patent ID: 8576017

Claim:
A power oscillator for an electronic induction heater driver, the power oscillator comprising: an H-bridge circuit comprising high-side and low-side semiconductor switches; a resonant tank circuit comprising a tank circuit inductor having first and second ends and a tank circuit capacitor, the tank circuit being electrically connected between legs of the H-bridge in a topological location of a conventional H-bridge load, the tank circuit inductor being configured to be able to inductively heat a fuel injector; and at least one energy replenishment inductor electrically in series with the H-bridge and configured to provide current to the tank circuit inductor; wherein the H-bridge circuit and the resonant tank circuit form a self-sustaining oscillator generating a sine wave signal, and wherein the H-bridge circuit and energy replenishment inductor are configured to provide current to the first end of the tank circuit inductor during a first half of the sine wave and provide current to the second end of the tank circuit during a second half of the sine wave.