Switched Resonant Ultrasonic Power Amplifier System
First Claim
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.
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Accused Products
Abstract
A switched resonant power amplifier system for ultrasonic transducers is disclosed. The system includes an amplifier that receives and processes a driver output signal for generating a drive signal that is provided to an ultrasonic device for controlling output of the ultrasonic device. An output control circuit receives and processes a signal related to a feedback signal generated by the ultrasonic device and a divider reference signal, and generates a compensated clock signal that is adjusted for at least one of phase and frequency differences between the received feedback signal and the divider reference signal. A compensated drive circuit receives and processes the compensated clock signal for generating the divider reference signal, and for generating the driver output signal.
41 Citations
15 Claims
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1. A system for controlling an output of an ultrasonic device, the system comprising:
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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. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15)
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Specification