Tape transport speed control using a playback data derived clock

Details Tape transport speed control using a playback data derived clock Tape transport speed control using a playback data derived clock

1981-11-16

1983-10-11

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the record

G11B 1552

Patent

active

044096283

ABSTRACT:
A tape transport speed control uses a synthesized clock signal primarily derived from playback data signals in a preselected primary data track. Data signal drop-out in the primary data track used to produce the synthesized clock signal is monitored by a digital logic circuitry which is effective to borrow secondary derived clock signals from an adjacent data track on the same tape. The borrowed secondary synthesized clock signals are used during the drop-out interval on the primary data. The handover of the borrowed clock signals from the adjacent track and the return to the clock signals derived from the primary track is performed automatically by a sensing of the start and end of the drop-out.

REFERENCES:
patent: 4296446 (1981-10-01), Zorbalas
patent: 4348699 (1982-09-01), Tsuchiya et al.

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