XIAOSEN LIU,ADRIAN I. COLLI-MENCHI,JAMES A. GILBERT,DANIEL A. FRIEDRICHS,KEITH W. MALANG,EDGAR SANCHEZ-SINENCIO
申请号：
US14797301
公开号：
US20160023021A1
申请日:
2015.07.13
申请国别(地区):
US
年份:
2016
代理人:
摘要：
An ultrasonic motion generator includes a non-resonant inverter, an ultrasonic transducer, and a comparator. The non-resonant inverter inverts direct current (DC) to alternating current (AC) having a first frequency. The ultrasonic transducer is electrically coupled with the non-resonant inverter and generates an ultrasonic motion based on the inverted AC. The comparator automatically detects a deviation of the first frequency from a resonant frequency of the ultrasonic transducer based on motion current passing through the ultrasonic transducer and generates an output signal based on the deviation to drive the non-resonant inverter.
