Dynamic information storage or retrieval – Condition indicating – monitoring – or testing – Including radiation storage or retrieval
Reexamination Certificate
2007-07-31
2007-07-31
Korzuch, William (Department: 2627)
Dynamic information storage or retrieval
Condition indicating, monitoring, or testing
Including radiation storage or retrieval
C369S053370, C369S124110
Reexamination Certificate
active
10786173
ABSTRACT:
An optical signal converter and a method or controlling an amplification gain according to a rotating speed of an optical disc. An optical signal detector detects an optical signal reflected from an optical disc in a reproduction mode and converts the detected optical signal into an electrical signal. A gain control signal generator generates a gain control signal when a voltage level of a driving signal used to drive the optical disc exceeds a maximum output voltage of the optical signal converter. A gain switcher selects an amplification gain of the optical signal converter in response to the gain control signal and an external control signal. A signal amplifier amplifies a signal output from the optical signal detector in response to an output signal of the gain switcher.
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Notice of Office Action issued by the Korean Patent Office on Mar. 29, 2005.
Baek Chang-hoon
Han Seung-man
Jeon Chul-ho
Kwon Sung-du
Korzuch William
Lamb Christopher
Staas & Halsey , LLP
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