Patent ID: 8485993
Filing Date: 2013-07-16
Classification: A61N,B06B,H01L

Abstract:
1. A system for controlling an output of an ultrasonic device, the system comprising: an amplifier configured to receive and process a driver output signal that drives an ultrasonic device and controls the output thereof; an output control circuit configured to receive and process a feedback signal generated by the ultrasonic device or a divider reference signal that generates a compensated clock signal adjusted for phase or frequency differences between the feedback signal and the divider reference signal; a compensated drive circuit including divider circuitry for stepping down the frequency of the compensated clock signal to a selectable frequency that generates a counter output signal and flip-flop circuitry for splitting the counter output signal into first and second complementary square waves together forming a driver input signal; and a driver that amplifies the driver input signal and generates the counter output signal, wherein the driver includes a phase delay circuit that selectively adjusts the phase relationship between the first and second complementary square waves of the counter output signal or the pulse width of pulses of at least one of the first and second complementary square waves of the counter output signal.