Patent ID: 8096961

Claim:
A system for controlling an output of an ultrasonic device, the system comprising: a switched resonant power amplifier adapted to generate a drive signal that is provided to an ultrasonic device to control the output of the ultrasonic device in response to a drive output signal; an output control circuit including a phase locked loop (PLL) receiving first and second input signals, wherein the PLL processes the first and second input signals to generate a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received first and second input signals; and a compensated drive circuit configured to generate a counter output signal based on the compensated clock signal, the compensated drive circuit including: flip-flop circuitry adapted to split the counter output signal into first and second complementary square waves together forming a driver input signal, wherein a sample of at least one of the first and second complementary square waves is the second input signal; and a driver adapted to amplify the driver input signal and generate the driver output signal.