| 摘要 |
The circuit traces the variation of the oscillating frequency to generate the optimal oscillating frequency for the ultrasonic vibrator. The circuit comprises an oscillator (1), a signal amplifier (2), a matching circuit (3), an output amplifier (4), an output resonator (5), and an ultrasonic vibrator (6). The middle tap of an oscillator coil (101) in an oscillator (1) is connected to the middle tap of the secondary winding of the output resonator (5) through a frequency tracer (7). The matching circuit (3) sets the phase of the secondary coinding (301-304) to +,-,-, and +.
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