1974-12-04
1976-08-24
Olms, Douglas W.
H04Q 1100
Patent
active
039768430
ABSTRACT:
A multi-frequency code receiver which determines, by the determination of the sum signal frequencies, tone frequencies of sampled tone signal frequency combinations received in digital form by selecting nominal sum signal frequencies for the received sum signals in dependence of a criterion which determines whether or not the amplitude of the tone signal frequency of the lowest value exceeds the amplitude of the tone signal frequency of the highest value.
REFERENCES:
patent: 3066193 (1962-11-01), Brightman
patent: 3151219 (1964-09-01), Ellis et al.
patent: 3223783 (1965-12-01), Yamamoto et al.
patent: 3710028 (1973-01-01), Pitroda
patent: 3801746 (1974-04-01), Buchner
patent: 3863030 (1975-01-01), Mills
Buchner Robert Bertold
Maat Jan Philippus
McGlynn Daniel R.
Olms Douglas W.
Trifari Frank R.
U.S. Philips Corporation
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