Electrical pulse counters – pulse dividers – or shift registers: c – Systems – Having phase shift
Patent
1994-12-09
1996-04-02
Heyman, John S.
Electrical pulse counters, pulse dividers, or shift registers: c
Systems
Having phase shift
327 9, 327 12, 327241, 327236, 331 1A, H03L 7091
Patent
active
055047904
ABSTRACT:
A digital phase detector that stores four sequential digital samples in a shift register. The contents of the shift register is evaluated at one half the clock frequency which generated the digital samples. The digital phase detectors predicts what the value should be for each of the two middle samples in the shift register. The predicted value and the actual value of each middle are used to generated a correction signal. The correction signals for the two middle samples are then added to produce a total correction signal which is to be used in controlling the phase and frequency of the voltage controlled oscillator in the phase locked loop generating the clock that controls the generation of the digital samples.
REFERENCES:
patent: 3839599 (1974-10-01), Pitroda
patent: 4090145 (1978-05-01), Webb
patent: 4180778 (1979-12-01), Worthington
patent: 4774479 (1988-09-01), Tateishi
patent: 4952883 (1990-08-01), Enomoto et al.
patent: 5241567 (1993-08-01), Shimakata
patent: 5311178 (1994-05-01), Pan et al.
patent: 5432480 (1995-07-01), Popescu
Dolivo et al., Fast Timing Recovery For Partial-Response Signaling Systems, IBM Research Division, Zurich Research Laboratory, 1989 IEEE, pp. 0573-0577.
Wood et al., Viterbi Detection of Class IV Partial Response on a Magnetic Recording Channel, IEEE Transactions on Communications, vol. COM-34, No. 5, May 1986, pp. 454-461.
Cideciyan et al., A PRML system for Digital Magnetic Recording, IEEE Journal on Selected Areas in Communications, vol. 10, No. 1, Jan. 1992, pp. 38-56.
Conner Peripherals, Inc.
Heyman John S.
LandOfFree
Digital data phase detector does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Digital data phase detector, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Digital data phase detector will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2022348