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Proceedings Paper

Research on phase locked loop in optical memory servo system
Author(s): Liqin Qin; Jianshe Ma; Jianyong Zhang; Longfa Pan; Ming Deng
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Paper Abstract

Phase locked loop (PLL) is a closed loop automatic control system, which can track the phase of input signal. It widely applies in each area of electronic technology. This paper research the phase locked loop in optical memory servo area. This paper introduces the configuration of digital phase locked loop (PLL) and phase locked servo system, the control theory, and analyses system's stability. It constructs the phase locked loop experiment system of optical disk spindle servo, which based on special chip. DC motor is main object, this system adopted phase locked servo technique and digital signal processor (DSP) to achieve constant linear velocity (CLV) in controlling optical spindle motor. This paper analyses the factors that affect the stability of phase locked loop in spindle servo system, and discusses the affection to the optical disk readout signal and jitter due to the stability of phase locked loop.

Paper Details

Date Published: 15 September 2005
PDF: 4 pages
Proc. SPIE 5966, Seventh International Symposium on Optical Storage (ISOS 2005), 596626 (15 September 2005); doi: 10.1117/12.649827
Show Author Affiliations
Liqin Qin, China Univ. of Geosciences (China)
Jianshe Ma, Tsinghua Univ. (China)
Jianyong Zhang, Tsinghua Univ. (China)
Longfa Pan, Tsinghua Univ. (China)
Ming Deng, China Univ. of Geosciences (China)

Published in SPIE Proceedings Vol. 5966:
Seventh International Symposium on Optical Storage (ISOS 2005)
Fuxi Gan; Lisong Hou, Editor(s)

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