Current averaging data separator

Details Current averaging data separator Current averaging data separator

G - Physics

06

F

G06F 1/04 (2006.01) G11B 20/10 (2006.01) G11B 20/14 (2006.01) H03L 7/089 (2006.01) H03L 7/14 (2006.01) H03L 7/199 (2006.01) H04L 7/033 (2006.01)

Patent

CA 2041867

Abstract Of The Disclosure A data separator for use in synchronizing data derived from a floppy disk or similar data source provides a variable net gain or loss of charge to vary the frequency of a voltage-controlled oscillator in accordance with the relative position of the data with respect to the clock until data centering or synchronization is achieved. The net charge is derived from a charge pump circuit that is controlled by a charge pump-up signal whose duration is proportional to the detected phase difference between the data and the clock, and a charge pump-down signal whose duration is one clock cycle. When the data pulse is centered within a clock cycle, the duration of a pump-up signal is one half that of a pump-down signal.

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