Signal frequency comparator and control apparatus

Claim 1

IN A FREQUENCY COMPARATOR HAVING A PAIR OF OUTPUT CHANNELS ESTABLISHING A POSITIVE POLARALITY OUTPUT PULSE IN THE CHANNELS ASSOCIATED WITH THE HIGHER FREQUENCY SIGNAL AND A PAIR OF SQUARE WAVE SIGNAL FORMERS CONNECTED ONE TO EACH OF SAID OUTPUT CHANNELS, SAID FORMERS INCLUDING A SAWTOOTH GENERATOR FEEDING A DIODE HAVING AN ELEMENT DETERMINING THE WIDTH OF THE SQUARE WAVE SIGNAL, THE COMBINATION WITH SAID FORMERS OF A RATE MODIFIER COMPRISING A PAIR OF RESISTORS HAVING ONE END OF EACH CONNECTED TO DIFFERENT OUTPUT CHANNELS AND THE OPPOSITE ENDS CONNECTED IN COMMON, A DIRECT CURRENT FILTER CONNECTED TO SAID RESISTORS AND ESTABLISHING A DIRECT CURRENT VOLTAGE IN PROPORTION TO THE PULSE REPETITION RATE OF THE OUTPUT PULSES, A MODIFYING CIRCUIT INCLUDING A CAPACITOR AND A POTENTIOMETER CONNECTED IN A SERIES CIRCUIT ACROSS THE OUTPUT SIDE OF THE FILTER AND A CAPACITOR AND A POTENTIOMETER IN PARALLEL BETWEEN ONE SIDE OF THE FILTER AND THE SERIES CIRCUIT, SAID POTENTIOMETERS CONSTITUTING MEANS FOR ADJUSTING THE NETWORK TIME CONSTANT, AND AN INVERTER AMPLIFIER CONNECTED TO THE OUTPUT OF THE MODIFYING CIRCUIT AND CONNECTED TO SAID DIODES FOR AUTOMATICALLY ADJUSTING THE WIDTH OF EACH SQUARE WAVE SIGNAL IN ACCORDANCE WITH THE FREQUENCY OF SAID OUTPUT PULSES.