Dynamic information storage or retrieval – Binary pulse train information signal – Binary signal gain processing
Patent
1994-05-06
1995-03-07
Psitos, Aristotelis
Dynamic information storage or retrieval
Binary pulse train information signal
Binary signal gain processing
364 54, 364124, 327 78, 327175, 327 31, G11B 700, G11B 509
Patent
active
053964799
ABSTRACT:
An apparatus for setting a threshold voltage for determining bit positions of digital data stored on an optical recording device utilizing pulse width modulation. The optical recording device reads a pattern from an optical medium. The read pattern has a fixed, known duty cycle. A feedback circuit processes the pattern according to an initial threshold voltage. The feedback signal is then input to a comparator. The comparator compares the feedback signal against the pattern. Based on this comparison, the amount of current input to and output from a compensation circuit is adjusted. Thereupon, the compensation circuit sets the threshold voltage accordingly.
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Maxoptix Corporation
Psitos Aristotelis
Wamsley Patrick
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