High frequency switching circuit.

摘要

A single-ended switching circuit is constituted by a primary winding (13,) of a transformer (13), a switching circuit (12,15) connected between the primary winding (131) and a DC power supply (11) and on-off operated with a predetermined cycle and also with a predetermined "on" period and a resonance capacitor (14) connected in parallel with the primary winding (131). A magnetic amplifier (20), a rectifying element (21) and a choke coil (22) are connected in series between a secondary side circuit of the transformer (13) and the load (23). The magnetic amplifier (20) includes a saturable reactor (17) which is held saturated during a half cycle of the voltage induced in a secondary winding (132) of the transformer (13) and remains unsaturated during the other half cycle of the voltage.