Switched resonant ultrasonic power amplifier system
First Claim
1. A method for controlling an output of an ultrasonic device, the method comprising:
- processing first and second input signals at a phase locked loop to generate a compensated clock signal adjusted for at least one of phase or frequency difference between the first and second input signals;
generating a counter output signal based on the compensated clock signal;
splitting the counter output signal into first and second complementary square waves;
measuring at least one of the first and second complementary square waves to obtain the second input signal; and
amplifying the first and second complementary square waves to generate a driver output signal to control an ultrasonic transducer.
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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.
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Citations
14 Claims
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1. A method for controlling an output of an ultrasonic device, the method comprising:
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processing first and second input signals at a phase locked loop to generate a compensated clock signal adjusted for at least one of phase or frequency difference between the first and second input signals; generating a counter output signal based on the compensated clock signal; splitting the counter output signal into first and second complementary square waves; measuring at least one of the first and second complementary square waves to obtain the second input signal; and amplifying the first and second complementary square waves to generate a driver output signal to control an ultrasonic transducer. - View Dependent Claims (2, 3, 4, 5, 6, 7)
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8. A method for controlling an output of an ultrasonic device, the method comprising:
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supplying a driver output signal to an ultrasonic transducer; processing first and second input signals at a phase locked loop to generate a compensated clock signal adjusted for at least one of phase or frequency difference between the first and second input signals; generating a counter output signal based on the compensated clock signal; splitting the counter output signal into first and second complementary square waves; measuring at least one of the first and second complementary square waves to obtain the second input signal; and amplifying the first and second complementary square waves to generate the driver output signal. - View Dependent Claims (9, 10, 11, 12, 13, 14)
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Specification