AUTOMATIC MODULATION CONTROL APPARATUS

摘要

PATENT APPLICATION ON AUTOMATIC MODULATION CONTROL APPARATUS BY FOREST M. CUMMINGS AND JACK S. SELLMEYER The present invention concerns circuitry for comparing the output power of an amplitude modulated RF transmitter with the supply power to the RF transmitter and using feedback from a comparator to a variable gain modulation amplifier to maintain the level of modulation constant. The scheme is illustrated for four different basic types of RF amplitude modulated transmitters.