Pulse or digital communications – Spread spectrum – Direct sequence
Patent
1979-05-09
1981-09-08
Pitts, Harold I.
Pulse or digital communications
Spread spectrum
Direct sequence
375119, H04L 700
Patent
active
042888743
ABSTRACT:
A system for generating from the incoming digital data signal the timing data required for sampling the data signal. A shift register is provided to phase the sampling clock with the incoming digital signal and generate a phase difference signal which is applied to a variable-frequency or variable phase oscillator so as to control its output frequency or phase, thereby synchronizing the sampling clock pulse with the incoming data signal. The output from the oscillator is used as the sampling clock.
REFERENCES:
patent: 4010323 (1977-03-01), Peck
patent: 4019149 (1977-04-01), Kustka
patent: 4117419 (1978-09-01), Rudd
patent: 4121170 (1978-10-01), Hartmann
patent: 4151485 (1979-04-01), Lafratta
Pitts Harold I.
Ricoh Co. Ltd.
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