Tracking error detection circuit using pilot signals during tape

Details Tracking error detection circuit using pilot signals during tape Tracking error detection circuit using pilot signals during tape

1989-09-20

1992-06-02

Psitos, Aristotelis

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

360 7714, G11B 5584

Patent

active

051192497

ABSTRACT:
An error detection circuit for a helical scanning type magnetic reproducing apparatus including a rotary drum having a first head and a second head provided on the periphery thereof for reproducing pilot signals recorded on a first area and a second area of respective tracks of a magnetic tape adjacent to the widthwise edges of the tape whereby height error of the heads, an inclination error of the rotary drum and tracking error due to the height error or inclination error are detected on the pilot signals so that tracking control is made. The error detection circuit includes at least two sample and hold circuits to sequentially sample and hold a level difference between a pair of pilot signals on either of the first or second tracks. The pilot signals are detected by one of the first or second heads with different first and second timings in synchronization with a detection of a synchronizing signal recorded on another track which corresponds to either of the first or second areas. An operational circuit estimates the selected ones of the outputs from the sample hold circuits.

REFERENCES:
patent: 4714971 (1987-12-01), Sigiki et al.
patent: 4839755 (1989-06-01), Yamada et al.

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