Voltage to frequency converter

Claim 1

SIGNAL APPARATUS COMPRISING: AN INTEGRATOR HAVING AN INPUT AND AN OUTPUT; FIRST AND SECOND CAPACITORS; CIRCUIT MEANS CONNECTING THE OUTPUT OF SAID INTEGRATOR AND ONE TERMINAL OF EACH OF SAID FIRST AND SECOND CAPACITORS FOR VARYING THE VOLTAGE ON SAID ONE TERMINAL OF ONE OF SAID FIRST AND SECOND CAPACITORS FROM A FIRST LEVEL TO ANOTHER LEVEL AND BACK TO SAID FIRST LEVEL IN RESPONSE TO THE OUTPUT OF SAID INTEGRATOR OF A SELECTED POLARITY ATTAINING A PREDETERMINED VALUE; FIRST AND SECOND PAIRS OF UNIDIRECTIONAL CONDUCUTION ELEMENTS SERIALLY CONNECTED BETWEEN THE OTHER TERMINALS OF SAID FIRST AND SECOND CAPACITORS; A SOURCE OF CURRRENT CONNECTED TO SAID ELEMENTS FOR SUPPLY FORWARD CONDUCTION CURRENT THROUGH THE FIRST PAIR OF SAID ELEMENTS DURING CHARGING OF ONE OF SAID FIRST AND SECOND CAPACITORS AND THROUGH THE SECOND PAIR OF SAID ELEMENTS DURING DISCHARGE OF SAID ONE OF THE FIRST AND SECOND CAPACITORS; AND MEANS INCLUDING SAID FIRST PAIR ELEMENTS COUPLING THE OTHER TERMINALS OF SAID FIRST AND SECOND CAPACITOR AND THE INPUT OF SAID INTEGRATOR.