POWER CONTROL CIRCUIT AND AN INTERMITTENT VOLTAGE SUPPLY USING SUCH A CIRCUIT

摘要

A power control circuit for controlling the base current to a switching transistor connected in series with a primary winding of a switching transformer in which a logic circuit controls first and second amplifiers which respectively supply base current to and absorb base current from the switching transistor. The logic circuit blocks base current flow whenever the current flow through the transistor or a secondary winding of the transformer exceeds predetermined values in accordance with timing pulses.