Citizens band transmitter with overall envelope feedback from an

Details Citizens band transmitter with overall envelope feedback from an Citizens band transmitter with overall envelope feedback from an

1978-09-05

1980-01-01

Griffin, Robert L.

325150, 325187, 325159, 325144, H04B 104

Patent

active

041818890

ABSTRACT:
A citizens band transmitter employing negative overall envelope feedback in the final RF stage obtains the feedback signal from a filter in the antenna coupling network which has a phase shift of 90 degrees or an odd multiple thereof at the radio frequency. A pair of detector diodes have their cathodes connected to opposite ends of filter and their anodes connected to a low pass filter to provide an envelope of the higher of the two voltages at either end of the filter in the coupling circuit in negative feedback to the modulating signal.

REFERENCES:
patent: 2297931 (1942-10-01), White
patent: 2426579 (1947-08-01), Peckham
patent: 3486128 (1969-12-01), Lohrmann
patent: 4044308 (1977-08-01), Stites et al.

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