Transistorized electronically regulated power supply

Claim 1

AN ELECTRONIC VOLTAGE REGULATOR CIRCUIT WHICH COMPENSATES FOR VOLTAGE VARIATIONS AT ITS OWN INPUT, COMPRISING THE COMBINATION OF: A PAIR OF INPUT TERMINALS AND A PAIR OF OUTPUT TERMINALS, ONE TERMINAL OF EACH OF SAID PAIRS OF TERMINALS BEING POSITIVE POLARITY AND THE OTHER BEING OF NEGATIVE POLARITY; A FIRST SEMICONDUCTOR DEVICE HAVING AT LEAST A CURRENT INPUT ELECTRODE, A CURRENT OUTPUT ELECTRODE, AND A CONTROL ELECTRODE CAPABLE OF REGULATING THE VALUE OF IMPEDANCE EFFECTIVE BETWEEN SAID INPUT AND OUTPUT ELECTRODES, SAID INPUT ELECTRODE BEING CONNECTED TO RECEIVE LOAD CURRENT ORIGINATING AT ONE TERMINAL OF SAID PAIR OF INPUT TERMINALS AND SAID OUTPUT ELECTRODE BEING CONNECTED TO THE ONE OF SAID PAIR OF OUTPUT TERMINALS OF CORRESPONDING POLARITY; MEANS COMPRISING AN IMPEDANCE HAVING FIRST AND SECOND ENDS, AND A SECOND SEMICONDUCTOR DEVICE SERIES CONNECTED TO AND FORMING A JUNCTION WITH SAID FIRST END OF SAID IMPEDANCE AND HAVING AT LEAST A CURRENT INPUT ELECTRODE, A CURRENT OUTPUT ELECTRODE, AND A CONTROL ELECTRODE CONNECTED TO CONTROL CURRENT THROUGH SAID IMPEDANCE THEREBY GENERATING A CONTROL CURRENT AT SAID JUNCTION; MEANS APPLYING SAID CONTROL CURRENT TO SAID CONTROL ELECTRODE OF SAID FIRST SEMICONDUCTOR DEVICE; AND ADDITIONAL MEANS FOR STABILIZING THE VOLTAGE APPLIED TO SAID SECOND END OF SAID IMPEDANCE, SAID ADDITIONAL MEANS COMPRISING A SOURCE OF SUBSTANTIALLY CONSTANT REFERENCE VOLTAGE, AND A THIRD SEMICONDUCTOR DEVICE HAVING AT LEAST A CURRENT INPUT ELECTRODE, A CURRENT OUTPUT ELECTRODE, AND A CONTROL ELECTRODE, SAID CONTROL ELECTRODE BEING CONNECTED TO RECEIVE SAID REFERENCE VOLTAGE AND SAID CURRENT INPUT AND OUTPUT ELECTRODES BEING CONNECTED TO PASS AT LEAST THE CURRENT ORIGINATING FROM SAID ONE TERMINAL OF SAID PAIR OF INPUT TERMINALS AND PASSING THROUGH SAID IMPEDANCE THEREBY TO MAINTAIN SAID SECOND END OF SAID IMPEDANCE AT A VOLTAGE WHICH REMAINS SUBSTANTIALLY CONSTANT WITH RESPECT TO SAID REFERENCE VOLTAGE.