Track crossing detector

Details Track crossing detector Track crossing detector

1988-09-14

1989-10-31

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 555, G11B 2108

Patent

active

048781363

ABSTRACT:
A circuit for accurately detecting the number of tracks crossed by a reading head during motion thereof across a record medium uses a state machine operation to detect track crossing transitions and to suppress the effect of noise. The head produces a signal which assumes one of four unique states in sequence as successive tracks are crossed. The circuit detects a valid track crossing when a generated next state is the correct next state for a present state indicated by the signal.

REFERENCES:
patent: 4096534 (1978-06-01), Brownback
patent: 4314291 (1982-02-01), Oda
patent: 4516178 (1985-05-01), Lee
patent: 4682253 (1987-07-01), Leslie
patent: 4691152 (1987-09-01), Ell

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