초록

Voltage or current or power supplied to the piezo-electric vibrator of an ultrasonic nebulizer is sensed and used as negative feedback to stabilize oscillation in the oscillator driving circuit.

대표청구항 ▼

In an ultrasonic wave nebulizer driving circuit that includes an oscillator for driving a piezo-electric vibrator generating ultrasonic waves, the improvement wherein said driving circuit includes a transistor oscillator therein coupled to said vibrator to power said vibrator and whose base current

In an ultrasonic wave nebulizer driving circuit that includes an oscillator for driving a piezo-electric vibrator generating ultrasonic waves, the improvement wherein said driving circuit includes a transistor oscillator therein coupled to said vibrator to power said vibrator and whose base current is controlled in order to control oscillation, and further comprising an output stabilizing circuit which detects the output of said oscillator as applied to said vibrator and controls said output by negatively feeding back a part of said output to the base circuit of the transistor to vary said base current when said oscillator output varies to counteract that variation.