| 摘要 |
An ultrasonic oscillator drive apparatus includes a phase delay circuit composed of a time constant circuit, a microcomputer for detecting flowing current of the ultrasonic oscillator, and a phase adjusting circuit for varying the time constant of the phase delay circuit according to an instruction of the microcomputer. The phase adjusting circuit is controlled so as to minimize the flowing current of the ultrasonic oscillator. With this configuration, it is possible to obtain optimal drive of the ultrasonic oscillator without manually performing phase adjustment.
|
