Single sideband carrier receiver system which produces an accurately phased carrier injection signal

Claim 1

IN A SINGLE SIDEBAND SUPPRESSED CARRIED RECEIVER SYSTEM HAVING MEANS FOR RECEIVING AN INPUT SIGNAL BEARING VOICE MODULATION THAT INCLUDES AT LEAST HARMONIC FREQUENCY COMPONENTS AND A MIXER STAGE CONNECTED TO THE MEANS FOR RECEIVING AN INPUT SIGNAL AND PRODUCING A DIFERENCE OUTPUT OF WHICH INCLUDES A SPECTRUM OF FREQUENCIES, A PHASE CONTROL NETWORK INCLUDING: MEANS FOR DETERMINING THE FUNDAMENTAL FREQUENCY OF VOICE MODULATION CONNECTED TO THE OUTPUT OF SAID MIXER STAGE; MEANS RESPONSIVE TO SAID DETERMINED FUNDAMNETAL FREQUENCY FOR GENERATING A SYNTHESIZED SPRECTRUM OF FREQUENCIES CONNECTED TO THE MEANS FOR DETERMINING THE FUNDAMENTAL FREQUENCY; AND MEANS FOR COMPARING SAID SYNTHESIZED SPECTRUM OF FREQUENCIES WITH SAID SPECTRUM OF FREQUENCIES APPEARING AT THE OUTPUT OF SAID MIXER STAGE WITH MEANS FOR COMPARING SAID SYNTHESIZED FREQUENCY CONNECTED TO SAID MIXER STAGE AND TO MEANS RESPONSIVE TO SAID DETERMINED FUNDAMENTAL FREQUENCY, SAID MEANS FOR COMPARING SAID SYNTHESIZED SPECTRUM PRODUCING AN ERROR OUTPUT SIGNAL WHEN THE PHASES OF THE TWO INPUT SIGNALS DO NOT COINCIDE.