Voltage to frequency transducer

Claim 1

IN COMBINATION, A SATURABLE CORE HAVING A SUBSTANTIALLY RECTANGULAR HYSTERESIS LOOP, A PAIR OF INDUCTIVELY COUPLED WINDING WOUND ON SAID CORE AND CONNECTED IN SERIES, A PAIR OF TERMINALS ADAPTED TO BE CONNECTED TO A SOURCE OF DIRECT CURRENT VOLTAGE, ONE OF SAID TERMINALS BEING CONNECTED TO THE JUNCTION OF SAID SERIES CONNECTED WINDINGS, THE OTHER OF SAID TERMINALS BEING CONNECTED BY SEPARATE ELECTRICAL PATHS TO THE END TERMINALS OF SAID SERIES CONNECTED WINDINGS TO PROVIDE OPPOSITE DIRECTIONS OF ENERGIZATION FOR SAID WINDINGS BY SAID SOURCE OF VOLTAGE CONNECTED TO SAID TERMINALS, AND A PAIR OF SEMICONDUCTOR DEVICES, EACH HAVING AN EMITTER, A COLLECTOR, AND A BASE, EACH OF SAID ELECTRICAL PATHS INCLUDING THE EMITTER AND COLLECTOR ELECTRODES OF A SEPARATE ONE OF SAID DEVICES, THE BASE ELECTRODE OF EACH OF SAID DEVICES BEING CONNECTED TO THE END TERMINAL OF SAID SERIES CONNECTED WINDINGS TO WHICH SAID ELECTRICAL PATH INCLUDING THE EMITTER AND COLLECTOR ELECTRODES OF THE OTHER OF SAID DEVICES IS CONNECTED TO CAUSE SAID TRANSISTORS TO EFFECT SAID ENERGIZATION OF SAID WINDINGS AT A FREQUENCY WHICH IS PROPORTIONAL TO THE MAGNITUDE OF SAID DIRECT CURRENT VOLTAGE.