Current driver circuit

Claim 1

CONSTANT CURRENT PULSE DRIVER FOR A VARIABLE IMPEDANCE LOAD COMPRISING A CURRENT SWITCHING TRANSISTOR HAVING COLLECTOR, BASE AND EMITTER, SAID COLLECTOR-EMITTER DEFINING A CURRENT PATH, A TRIGGER SIGNAL INPUT TERMINAL CONNECTED VIA A FIRST DIODE TO SAID BASE, A CONTROL MAGNETIC CORE WITH SUBSTANTIALLY RECTANGULAR HYSTERESIS-LOOP CHARACTERISTIC, A CONTROL WINDING ON SAID CONTROL CORE IN SERIES WITH SAID EMITTER-COLLECTOR CURRENT PATH, A FEEDBACK WINDING ON SAID CONTROL MAGNETIC CORE, VOLTAGE REFERENCE MEANS CONNECTED TO SAID FEEDBACK WINDING AND SAID COLLECTOR-EMITTER CURRENT PATH FOR REFERENCING SAID BASE AND EMITTER AT A CONTROLLABLE POTENTIAL DURING SAID TIME VARIATION OF SAID VARIABLE IMPEDANCE LOAD, A SECOND DIODE, SAID FEEDBACK WINDING BEING CONNECTED TO SAID BASE VIA SAID SECOND DIODE, SAID FIRST AND SECOND DIODES BEING POLED SO THAT SAID TRIGGER SIGNAL IS BLOCKED FROM APPLYING CURRENT TO SAID FEEDBACK WINDING AND SAID VOLTAGE DEVELOPED ACROSS SAID FEEDBACK WINDING IS BLOCKED FROM SAID INPUT TERMINAL, A RESET WINDING ON SAID CONTROL CORE, RESET SIGNAL MEANS CONNECTED TO SAID RESET WINDING ADAPTED TO CAUSE RESET CURRENT TO FLOW THEREIN THEREBY RESETTING SAID CONTROL CORE TO ITS INITIAL REMANENCE STATE, SAID VOLTAGE REFERENCE MEANS INCLUDING A ZENER DIODE CONNECTED ACROSS SAID FEEDBACK WINDING, SAID ZENER DIODE BEING POLED TO REFERENCE THE BASE AND EMITTER TO SAID ZENER DIODE BREAKDOWN VOLTAGE.