Electrical apparatus

Claim 1

A POWER SUPPLY COMPRISING INPUT TERMINALS FOR CONNECTION TO A DIRECT CURRENT VOLTAGE SOURCE, OUTPUT TERMINALS FOR SUPPLYING A REGULATED DIRECT CURRENT VOLTAGE TO A LOAD CIRCUIT, A CONTROLLED RECTIFIER HAVING MAIN ELECTRODES AND A CONTROL ELECTRODE, INDUCTANCE MEANS, FIRST CAPACITANCE MEANS, THE MAIN ELECTRODES OF SAID CONTROLLED RECTIFIER, SAID INDUCTANCE MEANS AND SAID FIRST CAPACITANCE MEANS BEING SERIALLY CONNECTED TO SAID INPUT TERMINALS, SAID OUTPUT TERMINALS BEING CONNECTED ACROSS SAID FIRST CAPACITANCE MEANS, FIRST CONTROL SIGNAL MEANS COMPRISING RESISTANCE MEANS AND RECTIFIER MEANS CONNECTING THE CONTROL ELECTRODE OF SAID CONTROLLED RECTIFIER WITH SAID INPUT TERMINALS FOR A PREDETERMINED PERIOD OF TIME UPON START-UP OF THE POWER SUPPLY, SECOND CONTROL SIGNAL MEANS COMPRISING RECTIFIER MEANS CONNECTING SAID OUTPUT TERMINALS IN CIRCUIT RELATION WITH SAID FIRST CONTROL SIGNAL MEANS, SAID FIRST AND SECOND CONTROL SIGNAL MEANS PROVIDING CONTROL SIGNALS FOR SWITCHING SAID CONTROLLEDD RECTIFIER FROM A NON-CCONDUCTIVE STATE TO A CONDUCTIVE STATE, SAID INDUCTANCE AND FIRST CAPACITANCE MEANS BEING SELECTED TO CAUSE SAID FIRST CAPACITANCE MEANS TO BE CHARGED TO A GREATER VOLTAGE MAGNITUDE THAN SAID SOURCE VOLTAGE WHEN SAID CONTROLLED RECTIFIER SWITCHES TO ITS CONDUCTIVE STATE, CAUSING SAID CONTROLLED RECTIFIER TO SWITCH BACK TO ITS NON-CONDUCTIVE STATE AND ALLOW SAID FIRST CAPACITANCE MEANS TO APPLY A DIRECT CURRENT VOLTAGE PULSE TO SAID OUTPUT TERMINALS, A TRANSISTOR HAVING BASE, COLLECTOR, AND EMITTER ELECTRODES, VOLTAGE SENSING MEANS FOR PRODUCING AN ERROR SIGNAL WHEN THE VOLTAGE AT SAID OUTPUT TERMINALS EXCEEDS A PREDETERMINED MAGNITUDE SAID VOLTAGE SENSING MEANS INCLUDING A ZENER DIODE CONNECTED BETWEEN SAID OUTPUT TERMINALS AND THE BASE ELECTRODE OF SAID TRANSISTOR, SECOND CAPACITANCE MEANS, SAID SECOND CAPACITANCE MEANS BEING CONNECTED ACROSS SAID ZENER DIODE TO IMPROVE SYSTEM RESPONSE TIME, THE COLLECTOR AND EMITTER ELECTRODES OF SAID TRANSISTOR BEING CONNECTED IN CIRCUIT RELATION WITH SAID FIRST AND SECOND CONTROL SIGNAL MEANS SUCH THAT WHEN SAID VOLTAGE SENSING MEANS APPLIES AN ERROR SIGNAL TO SAID TRANSISTOR, THE CONTROL SIGNALS FROM SAID FIRST AND SECOND CONTROL SIGNAL MEANS WILL BE SHUNTED THROUGH SAID TRANSISTOR AWAY FROM SAID CONTROLLED RECTIFIER.