Dynamic information storage or retrieval – Storage or retrieval by simultaneous application of diverse... – Magnetic field and light beam
Patent
1990-10-05
1992-05-05
Levy, Stuart S.
Dynamic information storage or retrieval
Storage or retrieval by simultaneous application of diverse...
Magnetic field and light beam
360114, 360 66, 369 14, G11B 1112, G11B 1304
Patent
active
051114402
ABSTRACT:
A control circuit for use in a magneto-optic data recording system is disclosed. The control circuitry includes proportional-integral-derivative (PID) circuitry for controlling the rotation position of a permanent magnet. Acceleration circuity is used in controlling the rotational movement of the permanent magnet. The outputs from the PID circuitry and the acceleration circuitry are selectively applied to drive circuity using a switch. The drive circuity supplies current to actuators for moving or controlling the position of the permanent magnet.
REFERENCES:
patent: 4701895 (1987-10-01), VanSant
patent: 4706232 (1987-11-01), Funada et al.
patent: 4748606 (1988-05-01), Naito et al.
patent: 4972337 (1990-11-01), Eguchi et al.
patent: 4979158 (1990-12-01), Yoda
Ohta et al., "Magneto-optical disk with reflecting layers", Proceedings SPIE vol. 382, Jan. 17-20, pp. 252-259.
Imamura, "Research Applies Magnetic Thin Films and the Magnetooptical Effect in Storage Devices", IEE, Mar. '83, pp. 100-103.
Gyorgy, "Optical Properties of Metals" (MnAlCee Filus for Magneto-optic applications, Journal of Applied Physics, vol. 42, No. 4, Mar. 15, 1971, pp. 1704 and 1705.
Kryder, "Magneto-optic recording technology (invited)", J. Appl. Phys., vol. 57, No. 1, Apr. 15, 1985, pp. 3914-3918.
Briones Robert A.
Hecht Matthew W.
Mathildus Gerardus L.
Levy Stuart S.
Nguyen Hoa
North American Philips Corporation
Treacy David R.
LandOfFree
An apparatus for controlling the rotation and stabilizing the po does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with An apparatus for controlling the rotation and stabilizing the po, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and An apparatus for controlling the rotation and stabilizing the po will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-1418567