Stabilised power supply circuits

Claim 1

A STABILISED POWER SUPPLY CAPABLE OF PROTECTING AGAINST EXCESSIVE LOAD CURRENT, SAID CIRCUIT COMPRISING, FIRST AND SECOND INPUT TERMINALS AND FIRST AND SECOND OUTPUT TERMINALS, A SERIES REGULATING TRANSISTOR CONNECTING SAID FIRST INPUT TERMINAL AND SAID FIRST OUTPUT TERMINAL, MEANS CONNECTING SAID SECOND INPUT TERMINAL TO SAID SECONE OUTPUT TERMINAL AND TO A SOURCE OF POSITIVE POTENTIAL, A DRIVER TRANSISTOR, MEANS CONNECTING THE EMITTER OF SAID SERIES TRANSISTOR TO THE EMITTER OF SAID DRIVER TRANSISTOR, MEANS CONNECTING THE COLLECTOR OF SAID DRIVER TRANSISTOR TO THE BASE OF SAID SERIES TRANSISTOR AND ALSO THROUGH A RESISTOR TO A SOURCE OF NEGATIVE BIASING POTENTIAL, A DIFFERENTIAL AMPLIFIER CONNECTED BETWEEN SAID SOURCE OF POSITIVE POTENTIAL AND SAID SOURCE OF NEGATIVE POTENTIAL AND HAVING TWO INPUT CIRCUITS AND AN OUTPUT CIRCUIT, A VOLTAGE DIVIDER CONNECTED ACROSS SAID FIRST AND SECOND OUTPUT TERMINALS AND CONNECTED TO ONE INPUT CIRCUIT OF SAID DIFFERENTIAL AMPLIFIER, A CONSTANT VOLTAGE SOURCE INCLUDING A ZENER DIODE CONNECTED TO THE OTHER INPUT CIRCUIT OF SAID DIFFERENTIAL AMPLIFIER, MEANS CONNECTING THE OUTPUT OF SAID DIFFERENTIAL AMPLIFIER TO THE BASE OF SAID DRIVER TRANSISTOR.