Data reading apparatus for identifying position of data tracks
Number of patents in Portfolio can not be more than 2000
United States of America Patent
Stats
-
Feb 16, 1993
Grant Date -
N/A
app pub date -
May 17, 1990
filing date -
Sep 20, 1988
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A data reading apparatus for an optical card which reads the optical card having a data area by a reading sensor. The data area on the optical card is formed by aligning a plurality of data tracks, each of which consists of a plurality of data bits, along a reference line extending perpendicular to the data tracks. The data reading apparatus includes a reference line detecting unit for outputting an average position signal on the reference line from a signal obtained by reading the reference line, and a data clock generating unit for generating data clocks which serve as a reference when the data bits are read on the basis of the average position data on the reference line. In consequence, very accurate data clocks can be obtained, and adjustment of an optical system, which would be required in a conventional apparatus, can be eliminated.
First Claim
Family
International Classification(s)
- Non-US Classification not provided for expired patents
Cited Art Landscape
Patent Citation Ranking
- Citation Ranking not provided for expired patents
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