FM demodulator using combined outputs of plural FM detectors

Details FM demodulator using combined outputs of plural FM detectors FM demodulator using combined outputs of plural FM detectors

1984-12-10

1986-09-16

Grimm, Siegfried H.

Demodulators

Amplitude modulation demodulator

Having specific distortion, noise or other interference...

329112, 329126, 375 80, 375 94, H03D 300, H03K 906

Patent

active

046125108

ABSTRACT:
An FM detection apparatus comprising a frequency dividing means, having a division ratio N, arranged to receive an incoming radio frequency (RF) signal carrying frequency modulation and to frequency divide the RF signal to provide a plurality of frequency divided signals each at the same frequency but mutually phase displaced so that the RF signal is represented by the divided signals in combination, a plurality of FM detectors arranged so that each FM detector receives a different one of the frequency divided signals and provides an output signal corresponding to the frequency modulation carried by the received frequency divided signal, and adding means operative to combine the output signals to provide a demodulated signal corresponding to the modulation carried by the incoming RF signal.

REFERENCES:
patent: 3863161 (1975-01-01), Johnson et al.

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