| 摘要 |
An ultrasonic generator circuit is described which comprises a resonant LC power oscillator circuit for driving an ultrasonic transducer, the resonant circuit comprising a voltage controlled switching element (an integrated gate bipolar transistor is preferred), and feedback being provided via a feedback transformer whose primary is connected in the resonant circuit, the secondary of the feedback transformer being connected to a feedback signal converter which, in dependence upon feedback current induced in the secondary of the feedback transformer, applied a feedback voltage to the input of the voltage controlled switching element (Fig. 6). |
