Pulse gate

Claim 1

AN AND GATE WHOSE OUTPUT IS ENERGIZED WHEN AN INPUT AND A CONTROL VOLTAGE ARE SIMULTANEOUSLY IN A PRESCRIBED STATE AND WHOSE OUTPUT IS THEREAFTER DEENERGIZED ONLY WHEN A PREDETERMINED ONE OF SAID INPUTS DEPARTS FROM SAID PRESCRIBED STATE, SAID GATE BEING POWERED ONLY BY SAID FIRST AND SECOND INPUTS, SAID AND GATE COMPRISING MULTIPLE UNIT SEMI-CONDUCTOR MEANS COMPRISING AT LEAST THREE PN JUNCTIONS, THE N TERMINAL OF A FIRST JUNCTION BEING COUPLED TO THE P TERMINAL OF A SECOND JUNCTION, AND THE N TERMINAL OF THE SECOND JUNCTION BEING COUPLED TO THE P TERMINAL OF THE THIRD JUNCTION, INPUT VOLTAGE MEANS COUPLED ACROSS THE P TERMINAL OF SAID FIRST JUNCTION AND THE N TERMINAL OF SAID THIRD JUNCTION TO FORWARDLY BIAS SAID FIRST AND THIRD JUNCTIONS AND REARWARDLY BIAS SAID SECOND JUNCTION, CONTROL VOLTAGE MEANS COUPLED TO SAID SECOND JUNCTION, SAID SEMI-CONDUCTOR MEANS HAVING A BREAKDOWN VOLTAGE THRESHOLD WHICH IS A FUNCTION OF THE CONTROL VOLTAGE, AND SAID SEMI-CONDUCTOR MEANS HAVING A HOLD VOLTAGE THRESHOLD, SAID INPUT VOLTAGE BEING LESS THAN SAID BREAKDOWN VOLTAGE WHEN SAID CONTROL VOLTAGE IS NOT IN SAID PRESCRIBED STATE, SAID INPUT VOLTAGE BEING SUFFICIENT LARGE TO CAUSE BREAKDOWN WHEN SAID CONTROL VOLTAGE IS IN SAID PRESCRIBED STATE, SAID PRESCRIBED STATE BEING ABOVE SAID HOLD VOLTAGE, SAID INPUT VOLTAGE MEANS INCLUDING A ZENER DIODE COUPLED BETWEEN SAID SECOND AND THIRD JUNCTIONS, WHEREBY WHEN AN INPUT VOLTAGE IS APPLIED, SAID ZENER DIODE IS OPERATED AT BREAKDOWN LEVEL AND THEREBY THE THRESHOLD LEVEL FOR SAID CONTROL SIGNAL IS REDUCED, SAID INPUT VOLTAGE MEANS INCLUDING A FORWARDLY BIASED DIODE CONNECTED TO SAID P TERMINAL, SAID CONTROL VOLTAGE MEANS INCLUDING A FIRST SERIES RESISTOR, AND A SECOND RESISTOR CONNECTED FROM SAID FIRST SERIES RESISTOR TO SAID N TERMINAL OF SAID THIRD JUNCTION, A LOAD CONNECTED FROM SAID N TERMINAL OF SAID THIRD JUNCTION AND A PARALLEL CIRCUIT COMPRISING A CAPACITOR AND A REVERSELY BIASED DIODE CONNECTED FROM THE P TERMINAL OF THE FIRST JUNCTION TO THE N TERMINAL OF THE THIRD JUNCTION.