Oscillators – Bridge type – Piezoelectric crystal in bridge
Patent
1987-04-02
1988-03-29
LaRoche, Eugene R.
Oscillators
Bridge type
Piezoelectric crystal in bridge
331158, 310317, H03B 532, H03B 538
Patent
active
047346590
ABSTRACT:
In an ultrasonic oscillator which comprises an ultrasonic vibrator for driving an ultrasonic vibrator horn of an ultrasonic atomizer, a balanced circuit in which the ultrasonic vibrator is connected so that a balanced condition is established with respect to the damping capacity of the ultrasonic vibrator, and amplifier means for sending a signal to the balanced circuit and which includes a feedback circuit for positively feeding back the signal output from the balanced circuit, the feedback circuit is connected to means for adjusting the feedback quantity so that, when the ultrasonic oscillator starts the oscillation, the signal feedback quantity output from the balanced circuit is adjusted to make the gain of the amplifier means much greater than 1, and when the oscillator is in the steadily oscillating condition, the signal feedback quantity output from the balanced circuit is adjusted to broaden the allowable frequency band width of the ultrasonic vibrator.
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Endoh Masami
Takezi Hiroyuki
Tanaka Yasuhisa
Yoneda Makoto
LaRoche Eugene R.
Mis David
Toa Nenryo Kegyo Kabushiki Kaisha
Ultrasonic Engineering Co., Ltd.
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