The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Apr. 03, 2001
Filed:
Aug. 13, 1998
Shigetaka Asano, Kasugai, JP;
Fujitsu Limited, Kawasaki, JP;
Abstract
A data reading unit reads analog data stored on a recording medium and converts the analog data to a digital signal synchronously with a clock signal. A waveform equalizer shapes the digital signal using a coefficient. The waveform equalizer also optimizes the coefficient synchronously with the clock signal using an intensity parameter. The waveform equalizer includes a control unit for setting an initial value of the intensity parameter and dynamically adjusting the intensity parameter. The data reader also includes a PLL circuit for generating the clock signal. The PLL circuit may generate the clock signal using a second intensity parameter. The PLL circuit includes a control unit for dynamically altering the second intensity parameter.