Industrial Technology Research Institute

Shin-Bo Wang

Feng-Hsiang Lo

Chih-Chung Wu

Kuo-Ding Shin

Yong-Long Lee

Chin-Shou Huang

Shin-Huei Wu

An automatic detecting device of land pre-pits signal is disclosed. The device adjusts gain of push-pull signals to raise the signal to noise ratio of the land pre-pits signal to the wobble signal. Digital logic computation is also utilized to recognize the practical position of the land pre-pits. The level automatic detection of the RC circuit and the fixed slice level compose an automatic slice level, which is the basis for detecting the land pre-pits. The disclosed device eliminates the drawback of not easy to obtain correct land pre-pits signal from written disks by the conventional of fixed land pre-pits slice level technology.

Growing community of inventors

Hsinchu, Taiwan

Shin-Bo Wang