Telecommunications – Receiver or analog modulated signal frequency converter – Frequency or phase modulation
Patent
1989-08-16
1990-11-20
Eisenzopf, Reinhard J.
Telecommunications
Receiver or analog modulated signal frequency converter
Frequency or phase modulation
455218, 455229, 370 84, 375104, H04B 110
Patent
active
049725106
ABSTRACT:
Unwanted audible noise on a mixed voice data channel is reduced by disabling an audio output device in a radio receiver or transceiver when the receiver determines that the RF signal received contains binary digital bit data. Alternatively, the receiver enables the audio output device when it determines that the RF signal received does not contain binary digital bit data.
REFERENCES:
patent: 3927376 (1975-12-01), Ferrie
patent: 4424514 (1984-01-01), Fennell et al.
patent: 4431991 (1984-02-01), Bauley et al.
patent: 4825193 (1989-04-01), Siwiak et al.
Guizerix David J.
Siegel William G.
Trine Linda M.
Charouel Lisa
Collopy Daniel R.
Eisenzopf Reinhard J.
Ingrassia Vincent B.
Koch William E.
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