This super regenerative detector circuit was found in an English documentation from 1963. The coil is frequency compliant. The transistors are germanium of the time.
This circuit is indicated for applications in alarms generating an intermittent high-power tone in a...
In the figure we have a three-phase AC motor control for voltages up to 600 V or 1200 V depending on...
This traditional dimmer configuration with SCRs, but with full wave control was found in a 1988...