Information signal recording and reproducing apparatus capable o

Details Information signal recording and reproducing apparatus capable o Information signal recording and reproducing apparatus capable o

1993-04-09

1995-06-13

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Electronically correcting phasing errors between related...

360 27, G11B 2020, G11B 502

Patent

active

054248809

ABSTRACT:
An information signal recording and reproducing apparatus having a reproducing head at a position anterior to a recording head by a distance corresponding to a predetermined time interval for recording an information signal on a recording medium and reproducing the recorded information signal. A test pattern signal is generated and delayed in a delay circuit by an amount determined by a control signal. An external delay-factor device receives the delayed test pattern signal and imposes a further delay thereon. The phase of the delayed signal from the external delay-factor device and the phase of the test pattern signal are compared and the control signal is generated, such that the sum of the amounts of delay imposed by the external device and the delay circuit becomes coincident with the predetermined time interval. Thus, the desired phase adjustment can be automatically and rapidly achieved with precision.

REFERENCES:
patent: 4141045 (1979-02-01), Sheehan
patent: 4312019 (1982-01-01), Kimura
patent: 4376268 (1983-03-01), Moriya et al.
patent: 4504870 (1985-03-01), Kitamura et al.
patent: 5146448 (1992-09-01), Adachi et al.

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