Regulated supply units

A regulated power supply system comprising in combination:

• a. a four legged bridge, each leg of which includes at least one high frequency switched power transistor;
• b. a source of DC voltage connected across one diagonal of said bridge;
• c. a regulated output transformer connected across the other diagonal of said bridge;
• d. clock controlled time base means;
• e. first and second pairs of switching circuits for said power transistors connected to control respectively, pairs of said transistors in diagonally opposite legs of said bridge;
• f. first and second circuits connected to said time base means for deriving therefrom first and second wave forms in relative phase opposition and connect said wave forms to the control inputs of said first and second pairs of switching circuits;
• g. each of said switching circuits including a transformer having a center tapped secondary winding connected across the collector emitter of at least one said power transistor and the tap connected to the base of the same transistor;
• h. a reference wave form generator;
• i. an error signal forming circuit connected to compare the secondary voltage of said output transformer with a reference voltage;
• j. a regulation signal forming circuit connected to receive said error signal and the output of said reference waveform generator and compare said signal;
• and
• k. means applying the output of said regulating signal forming circuit to one only of the transistor switching control circuits of said first pair and to one of the transistor switching circuits of said second pair, one of said switching circuits connected respectively to control two legs of said bridge connected to the same side of said DC voltage source.