Ultrasonic atomizer circuit having plural oscillators

Details Ultrasonic atomizer circuit having plural oscillators Ultrasonic atomizer circuit having plural oscillators

1989-09-29

1991-02-26

Grimm, Siegfried H.

Oscillators

Plural oscillators

12820016, 2391022, 310317, 331 56, 331116R, H03B 536, B05B 1706

Patent

active

049965026

ABSTRACT:
An ultrasonic atomizer circuit having a plurality of unit oscillator circuits has been improved by preventing undesired interference between oscillator circuits. Each unit oscillator circuit has a transistor (Q1) with a grounded collector, a piezo-electric vibrator (TD) coupled across the collector and the base of the transistor (Q1), a capacitor (C3) coupled across the emitter and the base of the transistor (Q1), and a capacitor (C1) coupled across the emitter and the collector of the transistor (Q1). An additional capacitor (C7) is provided between the base of the transistor (Q1) and the junction point of one end of the vibrator (TD) and the capacitor (C3), so that one end of said capacitor (C3) is separated from the base of the transistor for DC current.

REFERENCES:
patent: 3989042 (1976-11-01), Mitsui et al.
patent: 4054848 (1977-10-01), Akita
patent: 4641053 (1987-02-01), Takeda

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