Voltage regulator for a direct current power supply

Claim 1

An improved voltage regulator For a direct current power supply comprising: a. a pair of input terminals adapted to be connected to a unregulated source of direct current; b. a pair of output terminals for supplying regulated direct current; c. a transistor having an emitter and a collector forming a path, and having a base; d. means connecting one end of said emitter-collector path of said transistor to one of said input terminals; e. a filter circuit connected between the other end of said emitter-collector path of said transistor and one of said output terminals, said filter circuit comprising at least a shunt capacitor connected across said output terminals; f. means connecting the other input terminal to the other output terminal; g. a bistable multivibrator having a set input, a reset input, and an output which produces a first voltage in response to a set pulse applied to said set input and which produces a second voltage in response to a reset pulse applied to said reset input; h. means connected to said set input for applying a periodically recurring set pulse to said set input; i. voltage sensing means connected between said output terminals and said multivibrator reset input for applying a reset pulse to said reset input in response to the voltage across said output terminals reaching a predetermined magnitude; j. and means connecting said multivibrator output to said base of said transistor for rendering said emitter-collector path conductive in response to said first voltage and for rendering said emitter-collector path non-conductive in response to said second voltage.