Jpn. J. Appl. Phys. 40 (2001) pp. 1694-1697  |Next Article|  |Table of Contents|
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New Method of Calibrating Adaptive Writing Pulses for Digital Versatile Disc Random Access Memory (DVD-RAM) 4.7 GB Drive

Shigeru Furumiya^1,, Toshiyuki Fukushima¹ and Yukihiro Yamazaki²

(Received October 2, 2000; accepted for publication November 9, 2000)

In this paper, a new method of calibrating adaptive writing pulses suitable for installing into the digital versatile disc random access memory (DVD-RAM) 4.7 GB drive is described. To obtain a wider margin of write/read operation, it is desirable to optimize all adaptive parameters for every disk inserted into the drive. We propose the jitter minimizing (JM) method, which is characterized by using selected test patterns, detecting only jitter in the drive and applying a search algorithm to obtain bottom jitter. As a result of optimizing all parameters by JM, the total calibration time is 4.8 s with the accuracy of ≤1 ns, and overwrite jitter of random data is 8.6% at the drive. It is proved that JM offers the same results as the measurement by the time interval analyzer (TIA), uses small-sized hardware and exhibits satisfactory performance for application in commercial drives.

URL: http://jjap.jsap.jp/link?JJAP/40/1694/
DOI: 10.1143/JJAP.40.1694
KEYWORDS:DVD-RAM, mark edge recording, adaptive writing pulse, edge shift, test pattern, jitter minimizing (JM) method, TIA

References | Citing Articles (6)

1. S. Furumiya, K. Koishi, T. Shimada, N. Yamada, T. Nakajima, Y. Takemura, H. Kitaura and A. Kurahashi: ITE Tech. Rep. VIR'93-83 17 (1993) 7 [in Japanese].
2. S. Furumiya, T. Nakajima and Y. Takemura: U. S. Patent 5636194 (1997).