Circuit arrangement for obtaining a stabilized supply voltage

Claim 1

A CIRCUIT FOR REGULATING THE VOLTAGE ACROSS A LOAD COMPRISING, A SOURCE OF ALTERNATING CURRENT, CONTROLLED RECTIFIER MEANS HAVING FIRST AND SECOND ELECTRODES DEFINING A CURRENT PATH THEREIN AND A CONTROL ELECTRODE FOR CONTROLLING THE CURRENT FLOW IN SAID PATH, MEANS CONNECTING SAID RECTIFIER CURRENT PATH IN SERIES WITH SAID CURRENT SOURCE SO AS TO PRODUCE A DIRECT CURRENT VOLTAGE AT A PAIR OF TERMINALS OF SAID CIRCUIT, A SEMICONDUCTOR DEVICE COMPRISING FIRST AND SECOND ELECTRODES DEFINING A CURRENT PATH THEREIN AND A CONTROL ELECTRODE FOR CONTROLLING THE CURRENT FLOW IN SAID PATH, MEANS CONNECTING SAID LOAD AND THE CURRENT PATH OF SAID SEMICONDUCTOR DEVICE IN SERIES ACROSS SAID TERMINALS, MEANS PROVIDING A CONSTANT VOLTAGE CONNECTED TO SAID SEMICONDUCTOR DEVICE CONTROL ELECTRODE, A PHASE SHIFT CIRCUIT INTERCONNECTING SAID CURRENT SOURCE AND SAID CONTROLLED RECTIFIER CONTROL ELECTRODE, SAID PHASE SHIFT CIRCUIT INCLUDING A TEMPERATURE RESPONSIVE IMPEDANCE ELEMENT THERMALLY COUPLED TO SAID SEMICONDUCTOR DEVICE AND RESPONSIVE TO THE TEMPERATURE VARIATIONS THEREIN SO AS TO VARY THE RELATIVE PHASE OF THE VOLTAGE APPLIED TO SAID CONTROLLED RECTIFIER CONTROL ELECTRODE THEREBY TO VARY THE CONDUCTION PERIOD OF SAID CONTROLLED RECTIFIER MEANS IN A SENSE TO VARY THE AVERAGE D.C. VOLTAGE PRODUCED AT SAID TERMINALS INVERSELY WITH THE TEMPERATURE VARIATIONS OF THE SEMICONDUCTOR DEVICE.