Color television flat-field signal generator

Claim 1

IN A SIGNAL GENERATOR FOR PRODUCING COLOR TELEVISION TEST SIGNALS, THE COMBINATION COMPRISING A CLASS C OSCILLATOR OPERATING AT THE HORIZONTAL SYNCHRONIZING FREQUENCY AND HAVING AN ELECTRONIC DEVICE CONDUCTIVE FOR A MINOR FRACTION OF THE CYCLE OF SAID OSCILLATOR, FIRST MEANS FOR DERIVING PULSES FROM SAID OSCILLATOR CORRESPONDING TO THE RELATIVELY BRIEF INTERVALS OF CONDUCTION OF SAID ELECTRONIC DEVICE, SECOND MEANS FOR DERIVING RELATIVELY LONG PULSES CORRESPONDING TO INTERVALS OF NONCONDUCTION OF SAID ELECTRONIC DEVICE, THIRD MEANS CONNECTED TO SAID FIRST MEANS FOR PRODUCING A SYNCHRONIZING PULSE AND A DELAYED CARRIER BURST IN RESPONSE TO EACH OF THE PULSES FROM SAID FIRST MEANS, FOURTH MEANS CONNECTED TO SAID SECOND MEANS FOR PRODUCING A TRAIN OF CHROMA SIGNALS SUPERIMPOSED ON A BRIGHTNESS SIGNAL IN RESPONSE TO EACH OF THE PULSES FROM SAID SECOND MEANS, AND MEANS FOR COMBINING THE SIGNALS PRODUCED BY SAID THIRD AND FOURTH MEANS.