Switching converter power supply for constant current inputs

Claim 1

APPARATUS FOR SUPPLYING SUBSTANTIALLY CONSTANT POWER TO A VARIABLE IMPEDANCE LOAD FROM A SOURCE OF SUBSTANTIALLY CONSTANT CURRENT, COMPRISING A PAIR OF INPUT TERMINALS AND A PAIR OF OUTPUT TERMINALS, A TRANSISTOR HAVING EMITTER AND COLLECTOR ELECTRODES CONNECTED BETWEEN SAID PAIR OF INPUT TERMINALS AND HAVING A BASE ELECTRODE, A FILTER CAPACITOR CONNECTED BETWEEN SAID PAIR OF OUTPUT ELECTRODES, A TRANSFORMER HAVING A PRIMARY WINDING CONNECTED BETWEEN SAID PAIR OF INPUT TERMINALS IN SHUNTING RELATIONSHIP WITH RESPECT TO SAID EMITTER AND COLLECTOR ELECTRODES AND AN OUTPUT WINDING CONNECTED WITH PAIR OF OUTPUT TERMINALS IN SHUNTING RELATIONSHIP WITH RESPECT TO SAID FILTER CAPACITOR, SAID TRANSFORMER HAVING A FEEDBACK WINDING CONNECTED BETWEEN SAID BASE AND EMITTER ELECTRODES IN POLARITY TO PROVIDE REGENERATIVE OPERATION OF SAID TRANSISTOR, A RECTIFIER CONNECTED SERIALLY WITH SAID OUTPUT WINDING BETWEEN SAID OUTPUT TERMINALS, A SECOND CAPACITOR CONNECTED SERIALLY WITH SAID PRIMARY WINDING BETWEEN SAID INPUT TERMINALS, A VOLTAGE-DROPPING CIRCUIT CONNECTED SERIALLY WITH SAID SECOND CAPACITOR BETWEEN SAID BASE AND EMITTER ELECTRODES IN SHUNTING RELATIONSHIP WITH RESPECT TO SAID FEEDBACK WINDING, AND A THIRD CAPACITOR CONNECTED SERIALLY WITH SAID FEEDBACK WINDING BETWEEN SAID BASE AND EMITTER ELECTRODES, SAID THIRD CAPACITOR HAVING A CAPACITANCE SUFFICIENTLY SMALLER THAN THE CAPACITANCE OF SAID SECOND CAPACITOR TO HAVE NEGLIGIBLE SHUNTING EFFECT UPON SAID SECOND CAPACITOR.