Servo-track position detection systems

Details Servo-track position detection systems Servo-track position detection systems

1982-12-08

1985-05-21

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 558

Patent

active

045190070

ABSTRACT:
A servo track position detection system overcomes the measurement errors induced by the use of decoders employing two separate signal measuring circuits where the difference between the outputs of the circuits is indicative of the displacement of a signal-recovering transducer from central disposition over the servo track by using a servo track having opposed pairs of polarity transitions which sum the head to give a head output pulse whose polarity and magnitude are indicative of the distance and sense of displacement of the head from central disposition over the servo track and measured in a simple circuit.

REFERENCES:
patent: 4101942 (1978-07-01), Jacques
IBM Technical Disclosure Bulletin, vol. 17, No. 2, Jul. 1974, pp. 456-457, Magnetic Disk Servo Control Device, Zimmermann et al.
IBM Technical Disclosure Bulletin, vol. 18, No. 8, Jan. 1976, pp. 2656-2657, Null Servo Pattern, Betts.

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