Integrated oscillator with two complementary MOSFET's - one MOSFET acts as switch with resonant circuit and other MOSFET as load

摘要

The integrated MOSFET oscillator has two MOSFETs in drain/source series: the first (2) acts as switch and is an enriched type, whilst the second (3) acts as a load and is a depletion type. The resonant circuit is connected between the gate of the MOSFET switch and the junction between the two MOSFETs. This resonant circuit may consist of a quartz crystal (7) or an inductor in parallel with the resistor (8) earthed by a capacitor (9, 10) at each end. The advantage lies in the oscillator's large frequency constant and is therefore especially suitable for closks and ultrasonic remote controls.