Title: Magnetic tape phase encoded data read circuit

Abstract: This digital circuit generates a window during which the data bit transitions of phase encoded data may be read from magnetic tape. This circuit contemplates a system for reading nine track tape and comprises one phase lock loop and window generator for each track, and the logic and control circuitry necessary to deskew and output the data in the form of nine bit bytes. Each phase lock loop is individually free to correct itself to conform to the variations of its own track, and the control circuit can compensate for a total skew of up to four bit times.

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Inventors: Taggart, Jr., William Devore (Torrance, CA, US)
Itami, Franklin Satoshi (Manhattan Beach, CA, US)

Application Number: 559635
Filing Date: 1975-03-19
Publication_date: 1976-09-07
Assignee: Xerox Corporation (Stamford, CT)
Primary Class(es): 360/51
Other Classes:
US Patent Ref:

3493868	Feb, 1970	Hacket, Jr.	360/42.
3731220	May, 1973	Besenfelder	360/42.
3789400	Jan, 1974	Towns	360/26.
3887942	Jun, 1975	Horowitz	360/51.

Other Refs:
Primary Examiner: Canney, Vincent P.
Assistant Examiner:
Attorney: Ralabate; James J., Colitz; Michael J., Weiss; Franklyn C.