Miscellaneous active electrical nonlinear devices – circuits – and – Signal converting – shaping – or generating – Synchronizing
Patent
1994-02-01
1996-07-02
Callahan, Timothy P.
Miscellaneous active electrical nonlinear devices, circuits, and
Signal converting, shaping, or generating
Synchronizing
327160, 327261, 327265, H03L 700
Patent
active
055326323
ABSTRACT:
A method and circuit for synchronizing input data with a sample clock in which, for each sample clock cycle, the position of input data transitions relative to an acceptable neutral zone is detected. The neutral zone is of predetermined time duration and is positioned in a predetermined location relative to the active edge of the clock signal. If the transition occurs during the neutral zone no corrective action is warranted. If the data transitions move beyond the neutral zone, into a predetermined time interval on either side of the active edge, this event is captured and used by control logic to effect a return of the data transitions to a location within the neutral zone.
REFERENCES:
patent: 3851101 (1974-11-01), En et al.
patent: 4700347 (1987-10-01), Rettberg et al.
patent: 4821296 (1989-04-01), Cordell
patent: 4841551 (1989-06-01), Avaneas
patent: 5022056 (1991-06-01), Henderson et al.
patent: 5022057 (1991-06-01), Nishi et al.
patent: 5034967 (1991-07-01), Cox et al.
patent: 5278873 (1994-01-01), Lowrey et al.
Callahan Timothy P.
Denson-Low Wanda
Gudmestad Terje
Hughes Aircraft Company
Price Phyllis Y.
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