Pulse or digital communications – Repeaters – Testing
Patent
1984-04-17
1986-03-11
Griffin, Robert L.
Pulse or digital communications
Repeaters
Testing
375 46, 375 52, 375 56, 375 57, 375 67, 332 16R, 332 30V, H03C 304, H04L 2718
Patent
active
045758581
ABSTRACT:
A phase modulation low power integrated circuit communications arrangement which employs a frequency shift oscillator is disclosed. The frequency shift oscillator operates normally at a first frequency and is keyed to a second frequency for brief intervals to introduce cumulative first frequency phase change in an output signal. Subquadrature and larger increments of phase shift, spurious frequency component rejection with wave filters, and low power amplification of the modulated signal are also disclosed. Specifically, transitions in either (or both) of a pair of binary input signals cause a 45-degree (or 90-degree) phase shift in the phase-modulated carrier, unlike standard DQPSK modulation.
REFERENCES:
patent: 3054971 (1962-09-01), Khu
patent: 3068427 (1962-12-01), Weinberg
patent: 3506784 (1970-04-01), Garland
patent: 3585503 (1971-06-01), Rittenbach
patent: 3611147 (1971-10-01), Rittenbach
patent: 3665343 (1972-05-01), Thompson
patent: 3755739 (1973-08-01), Okano
patent: 3784914 (1974-01-01), Aillet
patent: 3909748 (1975-09-01), Yuan et al.
patent: 4052682 (1977-10-01), Wilcox
patent: 4174505 (1979-11-01), Querry
patent: 4210879 (1980-07-01), Poitevin et al.
patent: 4303894 (1981-12-01), Akazawa
Glenny Raymond C.
Griffin Robert L.
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