Voltage regulator

Claim 1

A DIRECT-CURRENT POWER SUPPLY FOR PRODUCING A REGULATED VOLTAGE WITHIN PARTICULAR LIMITS, INCLUDING: POWER SUPPLY OUTPUT TERMINALS; AN INPUT TERMINAL FOR A SOURVE OF POTENTIAL OUTSIDE THE PARTICULAR LIMITS OF THE OUTPUT VOLTAGE PRODUCED BY THE POWER SUPPLY; A VARIABLE IMPEDANCE DEVICE COUPLED IN SERIES WITH THE OUTPUT TERMINALS AND HAVING AN INPUT ELEMENT FOR CONTROLLING THE VARIABLE IMPEDANCE OF THE DEVICE IN RESPONSE TO AN ERROR SIGNAL; A ZENER DIODE COUPLED BETWEEN THE INPUT TERMINAL AND THE VARIABLE IMPEDANCE DEVICE AND ONE OF THE OUTPUT TERMINALS FOR PRODUCING A CONSTANT POTENTIAL DIFFERENCE BETWEEN THE INPUT TERMINAL AND THE ONE OUTPUT TERMINAL; A VOLTAGE DIVIDER HAVING FIRST AND SECOND TERMINALS AND HAVING A TERMINAL INTERMEDIATE THE FIRST AND SECOND TERMINALS FOR DEVELOPING A CONTROL POTENTIAL AND HAVING ITS FIRST AND SECOND TERMINALS COUPLED BETWEEN THE INPUT TERMINAL AND THE OTHER OUTPUT TERMINAL; A DIFFERENTIAL AMPLIFIER HAVING A FIRST INPUT TERMINAL COUPLED TO THE ONE OUTPUT TERMINAL, HAVING A SECOND INPUT TERMINAL COUPLED TO THE INTERMEDIATE TERMINAL OF THE VOLTAGE DIVIDER AND HAVING AN ERROR SIGNAL OUTPUT TERMINAL COUPLED TO THE INPUT ELEMENT OF THE VARIABLE IMPEDANCE DEVICE AND RESPONSIVE TO THE CONSTANT POTENTIAL DIFFERENCE AND TO THE CONTROL POTENTIAL FOR INTRODUCING AN ERROR SIGNAL TO THE VARIABLE IMPEDANCE DEVICE FOR CONTROLLING THE IMPEDANCE OF THE VARIABLE IMPEDANCE DEVICE; A VIBRATOR HAVING AN OSCILLATING ELEMENT COUPLED TO THE ONE OUTPUT TERMINAL, HAVING A FIRST SWITCH CONTACT IN COOPERATIVE RELATION WITH THE OSCILLATING ELEMENT AND COUPLED TO THE INTERMEDIATE TERMINAL OF THE VOLTAGE DIVIDER AND HAVING A SECOND SWITCH CONTACT IN COOPERATIVE RELATION WITH THE OSCILLATING ELEMENT; A PHASE-INVERTING AMPLIFIER HAVING AN INPUT CONDUCTOR COUPLED TO THE FIRST SWITCH CONTACT OF THE VIBRATOR AND HAVING AN OUTPUT CONDUCTOR COUPLED TO THE SECOND SWITCH CONTACT OF THE VIBRATOR; AND MEANS COUPLED TO THE SECOND SWITCH CONTACT OF THE VIBRATOR AND TO THE FIRST INPUT TERMINAL OF THE DIFFERENTIAL AMPLIFIER FOR ELIMINATING UNDIRECTIONAL PULSATIONS FOR THE OUTPUT OF THE PHASE-INVERTING AMPLIFIER.