Patent ID: 7095681
Filing Date: 2006-08-22
Classification: G11B

Abstract:
1. An apparatus for detecting a wobble signal, comprising: a slope detection unit configured to detect a slope of the wobble signal according to a variation thereof, the slope including a positive slope and a negative slope; and a wobble signal detection unit configured to detect a peak point of said wobble signal using the detected wobble signal slope, and to output a square-wave wobble signal with a high level or low level transition at the detected peak point, wherein said slope detection unit detects the positive slope and the negative slope such that the positive slope of the wobble signal is detected if a compared value between a current wobble signal and a previous wobble signal represents a positive slope value, and the negative slope of the wobble signal is detected if the compared value between the current wobble signal and the previous wobble signal represents a negative slope value.