Optical disk apparatus capable of using a ROM compact disk or a magneto-optical disk
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 24, 1998
Grant Date -
N/A
app pub date -
Sep 23, 1996
filing date -
Dec 15, 1995
priority date (Note) -
In Force
status (Latency Note)
Importance
Abstract
A CD and an MO cartridge are accessed by a pickup of the same optical system, thereby allowing 4-split photodetectors to receive a medium return light to obtain a tracking error detection signal. Upon recording and reproduction of the MO cartridge, a tracking error detecting circuit for MO detects a first tracking error signal by a push-pull method on the basis of light reception signals obtained from the pickup. Upon reproduction of the CD, a tracking error detecting circuit for CD detects a second tracking error signal by a heterodyne method on the basis of the light reception signals obtained from the pickup.
First Claim
Family
International Classification(s)
Cited Art Landscape
Patent Citation Ranking
Recipient Email Address
Recipient Email Address
Comment
Recipient Email Address
Add to Portfolio(s)
To add this patent to one, or more, of your portfolios, simply click the add button.
This Patent is in these Portfolios:
Add to additional portfolios:
Last Refreshed On:
Changes done successfully