Phase-locked data detector

Details Phase-locked data detector Phase-locked data detector

1987-04-20

1988-06-07

Griffin, Robert L.

Pulse or digital communications

Repeaters

Testing

375120, 331 1A, 328 55, H03D 324

Patent

active

047501936

ABSTRACT:
The data detector for extracting clock information from an encoded run length limited data signal, including a control loop comprised of a phase detector, the charge pump, a filter buffer circuit and a voltage-controlled oscillator, wherein the data detector embodies a monostable multivibrator having a Q2 output that changes from low to high state at one-half the duration of the Q1 output, so that the Q2 output lags Q1 by 90 degrees and appears in phase with the extracted clock signal when the loop is locked.

REFERENCES:
patent: 3983498 (1976-09-01), Malek
patent: 3983506 (1976-09-01), Rettinger, Jr. et al.
patent: 4017806 (1977-04-01), Rogers
patent: 4105946 (1978-08-01), Ikeda
patent: 4112383 (1978-09-01), Burgert
patent: 4121172 (1978-10-01), Garde
patent: 4134081 (1979-01-01), Pittaro
patent: 4229823 (1980-10-01), Thomson et al.
patent: 4246545 (1981-01-01), Reisfeld
patent: 4437072 (1984-03-01), Asami
patent: 4534044 (1985-08-01), Funke et al.

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