Magnetic head moving velocity detector

Details Magnetic head moving velocity detector Magnetic head moving velocity detector

1983-05-03

1985-04-09

Stellar, George G.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Controlling the head

G11B 555

Patent

active

045105375

ABSTRACT:
A detector for the moving velocity of a magnetic head of a magnetic disc memory device by electrically processing a position signal of the magnetic head, which includes a circuit for differentiating the position signal, means for rectifying the differentiating circuit, a circuit for sampling-hold of the rectified signal, a phase-shifter for delaying the position signal and means for generating a timing pulse signal to determine the timing for sampling, with the phase delaying characteristic of the transfer function of the differentiating circuit and the phase-shifting circuit being substantially coincided.

REFERENCES:
patent: 3691543 (1972-09-01), Mueller
patent: 3820712 (1974-06-01), Oswald
IEEE Transactions on Magnetics, vol. MAG-11, No. 5, Sep. 1975, pp. 1245-1246, An Electronic Tachometer for Disk File Motion Control, R. Oswald.

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