Patent ID: 11917365
Assignee: nan
Field: Audio-visual technology (Electrical engineering)
Classification: CPC H  B | IPC B  H

Claim 9:
10. An ultrasonic generator system, comprising:
an output stage operative to provide an ultrasonic drive signal;
a bias voltage generator operative to generate a variable DC bias voltage having an associated bias voltage polarity;
a summing node operative to sum the ultrasonic drive signal with the variable DC bias voltage, thereby producing a biased ultrasonic drive signal for driving an ultrasonic transducer; and
a processor operative to control the bias voltage generator for generating the DC bias voltage,
wherein the bias voltage generator is further operative to charge a capacitor with the variable DC bias voltage, and
wherein the processor is further operative to monitor a voltage level across the capacitor, and to control a pulse source based on the monitored voltage level for maintaining a charge on the capacitor that corresponds to the variable DC bias voltage.