Patent ID: 8680777

Claim:
A dielectric barrier discharge power system comprising: an inverter stage; a resonant tank receiving an output of the inverter stage and outputting a signal for powering at least one dielectric barrier discharge cell; and a control circuit comprising: a gate driver providing switching signals to the inverter stage, the switching signals including a phase shift for soft switching; and a pulse width modulation (PWM) controller for generating a switching frequency for the gate driver, the PWM controller having a first input configured to receive a first signal for adjusting a duty cycle of the switching frequency to perform PWM and a second input configured to receive a second signal for adjusting a clock frequency time constant of the PWM controller to perform frequency modulation (FM); wherein the control circuit receives a feedback signal from the dielectric barrier discharge system and uses the feedback signal to generate the first signal and the second signal according to a load or line value of the dielectric barrier discharge system.