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:
Aug. 26, 2008
Filed:
Oct. 06, 2004
Yu-kai Chou, Kao Hsiung, TW;
Yu-Kai Chou, Kao Hsiung, TW;
Mediatek Inc., Hsin Chu, TW;
Abstract
A detector for detecting information carried by a wobble signal having a sawtooth-like shape with a base frequency of f. The detector includes a first band-pass filter having a center frequency close to 2*ffor filtering the wobble signal and generating a first filtered signal, a second band-pass filter having the center frequency close to ffor filtering the wobble signal and generating a second filtered signal, first and second comparators for respectively comparing the first and second filtered signal with a reference voltage and generating first and second compared signals, a delay unit for delaying the second compared signal by a time period, and then outputting a delayed signal, and a sampling unit for sampling the first compared signal using the delayed signal as a sampling clock, and for outputting a sampled value representing the information carried by the sawtooth wobble.