Rotation control device for a rotary head in a magnetic recordin

Details Rotation control device for a rotary head in a magnetic recordin Rotation control device for a rotary head in a magnetic recordin

1988-07-14

1991-04-16

Psitos, Aristotelis M.

Dynamic magnetic information storage or retrieval

Automatic control of a recorder mechanism

Synchronizing moving-head moving-record recorders

360 75, G11B 552

Patent

active

050087630

ABSTRACT:
A rotation control device for a rotary head in a rotary head type magnetic recording and reproducing device such as an R-DAT cmprises a rotary head including an FG (frequency generator) for producing a signal at a period determined by equally dividing one rotation of a drum and a PG (phase generator) for detecting a rotation reference position of the drum, a circuit for generating a PG reference signal as a reference signal for a PG detection signal provided by the PG, a circuit for generating an FG reference signal as a reference signal for an FG detection signal provided by the FG, and a control circuit for controlling rotation phase of the drum to a predetermined state by controlling rotation of the drum in accordance with a phase error between the PG detection signal and the PG reference signal and a phase error between the FG detection signal and the FG reference signal. Rotation of the drum is controlled in accordance with the two phase errors in such a manner that the PG detection signal is locked with the PG reference signal at a predetermined phase difference and the FG detection signal is locked with the FG reference signal at a predetermined phase difference whereby the phase of rotation of the drum is controlled to a predetermined state.

REFERENCES:
patent: 3643012 (1972-02-01), Clark et al.
patent: 3729583 (1973-04-01), Yano
patent: 3742132 (1973-06-01), Sanguu et al.
patent: 4047231 (1977-09-01), Garagnon

Affiliated with

Also associated with

Rating

Rotation control device for a rotary head in a magnetic recordin does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Rotation control device for a rotary head in a magnetic recordin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Rotation control device for a rotary head in a magnetic recordin will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-425415