Magneto-optical memory device

Details Magneto-optical memory device Magneto-optical memory device

1989-11-22

1991-03-12

Levy, Stuart S.

Dynamic information storage or retrieval

Storage or retrieval by simultaneous application of diverse...

Magnetic field and light beam

369124, 369 47, G11B 1304, G11B 1110, G11B 1112

Patent

active

049998242

ABSTRACT:
An magneto-optical memory device for recording, reproducing or erasing information by applying an optical beam such as a laser beam onto a magneto-optical recording medium, the magneto optical memory device including a recorded region detecting circuit for detecting information recorded region formed in the recording medium. In the memory, a timing control for recording, reproducing or erasing is performed with the use of one result obtained through detection of a synchronizing signal such as a sector mark indicative of a starting point of an information block and another result obtained through detection in the recorded region detecting circuit. The recorded region detecting circuit comprises a pair of peak hold circuits for detecting a peak levels of the playback signals and first and second selecting circuits for selecting one of the reproduced signals and for selecting one of two reference voltages with different voltage levels, respectively smoothing the playback signal, and a comparator for comparing the outputs of the first and second selecting circuits.

REFERENCES:
patent: 4385328 (1983-05-01), Tanaka
patent: 4764913 (1988-08-01), Sakaki et al.
patent: 4870633 (1989-09-01), Matsushita et al.

Affiliated with

Also associated with

Rating

Magneto-optical memory device does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Magneto-optical memory device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Magneto-optical memory device will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-453024