LIU, XIAOSEN,COLLI-MENCHI, ADRIAN I.,GILBERT, JAMES A.,FRIEDRICHS, DANIEL A.,MALANG, KEITH W.,SANCHEZ-SINENCIO, EDGAR
申请号：
CA2897555
公开号：
CA2897555A1
申请日:
2015.07.15
申请国别(地区):
CA
年份:
2016
代理人:
摘要：
An ultrasonic motion generator includes a non-resonant inverter, an ultrasonictransducer, and a comparator. The non-resonant inverter inverts direct current(DC) toalternating current (AC) having a first frequency. The ultrasonic transduceris electricallycoupled with the non-resonant inverterand generates an ultrasonic motion based on the inverted AC. The comparatorautomatically detects a deviation of the first frequency from a resonantfrequency of theultrasonic transducer based on motion current passing through the ultrasonictransducer andgenerates an output signal based on the deviation to drive the non-resonantinverter.
