Feedback controlled single sideband generator

Claim 1

A SIGNAL GENERATOR COMPRISING A SINGLE SIDEBAND MODULATOR HAVING INPUT AND OUTPUT TERMINALS, SAID MODULATOR PRODUCING AN AMPLITUDE AND PHASE MODULATED HIGH FREQUENCY SIGNAL AT SAID OUTPUT TERMINAL IN RESPONSE TO A CONTROL SIGNAL APPLIED TO SAID INPUT TERMINAL, SAID HIGH FREQUENCY SIGNAL HAVING A SPECTRUM WHICH IS EITHER IDENTICAL TO OR MIRROR-SYMMETRICAL TO THE SPECTRUM OF SAID CONTROL SIGNAL EXCEPT FOR A PREDETERMINED FREQUENCY SHIFT, A SIGNAL SUMMING CIRCUIT HAVING TWO INPUT TERMINALS AND AN OUTPUT TERMINAL, A LOW-PASS FILTER AND A SQUARE LAW DETECTOR CONNECTED IN SERIES CIRCUIT BETWEEN ONE OF SAID INPUT TERMINALS OF SAID SUMMING CIRCUITT BETWEEN ONE OF OUTPUT TERMINAL OF SAID MODULATOR, A SOURCE OF MODULATING SIGNALS CONNECTED TO THE OTHER OF SAID INPUT TERMINALS OF SAID SUMMING CIRCUIT, A SIGNAL AMPLIFIDER CONNECTED TO SAID OUTPUT TERMINAL OF SAID SUMMING CIRCUIT, AND A SIGNAL PROCESSING NETWORK FOR CONNECTING THE OUTPUT OF SAID SIGNAL AMPLIFIER TO SAID INPUT TERMINAL OF SAID MODULATOR; SAID NETWORK COMPRISING MEANS FOR PRODUCING A FIRST SIGNAL REPRESENTING THE AVERAGE VALUE OF THE SIGNAL AT THE OUTPUT OF SAID SIGNAL AMPLIFIER, AND MEANS FOR COMBINING SAID FIRST SIGNAL AND SAID SIGNAL AT THE OUTPUT OF SAID SIGNAL AMPLIFIER TO PRODUCE SAID CONTROL SIGNAL, SAID CONTROL SIGNAL BEING APPLIED TO SAID INPUT TERMINAL OF SAID MODULATOR.