G - Physics – 11 – B
Patent
G - Physics
11
B
352/19
G11B 20/10 (2006.01) G11B 20/22 (2006.01)
Patent
CA 1286398
Abstract: An apparatus for recording and reproducing on magnetic tape data signals carrying digital information at periodically appearing reference phases. The apparatus employs a detector for detecting and producing phase data at each of a series of sampling points. Two subsequently sampled phase data are stored in latches for use in three comparators. The first comparator compares the first sampled phase data and the sec- ond sampled phase data. The second comparator compares the first sampled phase data with a predetermined value, and the third comparator compares the second sampled phase data with the predetermined value. Utilizing the outputs of the three comparators, a phase condition detector detects whether or not a reference phase is located between two successive sam- pling points. A detection pulse generator is provided for generating a data detection pulse when the phase condition detector detects the reference phase. The apparatus is relatively insensitive to jitter and wow flutter and hence to tape speed.
511793
II Hiroshi
Koyanagi Katsubumi
Yasuda Syuhei
Kirby Eades Gale Baker
Sharp Kabushiki Kaisha
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