Patent Number: 8,792,203

Title: Method and a demodulator for demodulating a position error signal from a readback servo signal

Abstract: According to embodiments of the present invention, a method for demodulating a position error signal from a readback servo signal having a first frequency associated with a first servo track of a storage medium and a second frequency associated with a second servo track adjacent to the first servo track is provided. The method includes sampling the readback servo signal at successive time instants to provide a sequence of samples, computing a Discrete Fourier Transform based on the sequence of samples, and providing a measurement indicative of the position error signal based on the Discrete Fourier Transform. According to further embodiments of the present invention, a demodulator is also provided.

Inventors: Chan; Kheong Sann (Singapore, SG)

Assignee: Agency for Science, Technology and Research

International Classification: G11B 5/596 (20060101); G11B 5/09 (20060101); G11B 20/10 (20060101)

Expiration Date: 7/29/12018