Ultrasonic oscillator circuit for liquid spray - has coupling transformer between pulse circuit and piezoelectric oscillator

摘要

A liquid spray device has a piezoelectric spray unit inductively coupled to the sociallator portion of the circuit by a transformer (2). The oscillator has a transistor (5) which has the primary (21) of th transformer between its collector and base. A resistor (6) in series with the primary has the supply connection (100) at their junction. A return coupling transformer (3) is positioned in the base emitter circuit with a capacitor (4) between the secondary (31) and the primary (32) of this transformer at a further contact (101) is located at the junction between this capacitor (4) and the secondary.