Makoto Usui

S. Gotoh; Toshihiko Takahashi; K. Irie; Kazuya Ohshima; N. Mimura; Kazutoshi Aida; Toshinori Maeda; Takashi Yamamoto; Koji Sushihara; Y. Okamoto; Y. Tai; Takeshi Nakajima; Makoto Usui; T. Ochi; K. Komichi; Akira Matsuzawa

This paper describes a fully integrated single-chip CMOS mixed-signal system on a chip (SoC) for DVD RAM and ROM systems. It integrates a 32-b RISC CPU, formatter, servo digital signal processor (DSP), 16-Mb DRAM, error correction code (ECC), ATA interface, and partial-response-maximum-likelihood (PRML) read channel with 7-b interpolated parallel analog-to-digital converter (ADC). Increasing the bus bandwidth by using embedded DRAM, a hardware ECC engine, and four parallel digital finite-impulse response (FIR) filters contributes to the high playback speed of 16/spl times/. PR(3,4,4,3) architecture has been used in the read channel system for optical disc systems. The obtained wide tangential tilt margin of /spl plusmn/0.6/spl deg/ is due to the use of this PRML read channel technique. The interpolated parallel scheme has attained a high number of effective bits of 6.3 for 72-Mz input frequency at 432-MSample/s operation without any calibration technique, with low power consumption of 180 mW in a small core size of 1.05 mm/sup 2/. This SoC has been fabricated in 0.18-/spl mu/m 1PS3AL CMOS embedded DRAM technology. It contains 24 million transistors in a 144-mm/sup 2/ die and consumes 1.2 W at 432-MSample/s operation. This low power consumption allows the use of a low-cost plastic package. As a result, we can compose highly reliable DVD RAM and ROM systems with this SoC and some tiny components.

Katsumi Murai; Makoto Usui

Yukio Iijima; Nobuaki Minakuchi; Makoto Usui; Yasushi Ueda; Makoto Okazaki; Takahiro Nagai

Toyoji Gushima; Shigeru Furumiya; Takashi Ishida; Hiromichi Ishibashi; Hironori Deguchi; Atsushi Nakamura; Junichi Minamino; Makoto Usui; Takeshi Nakajima

Kaoru Yokota; Motoji Ohmori; Makoto Tatebayashi; Makoto Usui; Masato Yamamichi

Shinichi Kadowaki; Masaru Yamaoka; Takashi Yumiba; Toyoji Gushima; Makoto Usui; Shinichi Tanaka; Mitsurou Moriya

Kohei Nakata; Toyoji Gushima; Makoto Usui; Kazuya Ohshima; Junichi Minamino

Katsumi Murai; Makoto Usui

Yuji Takagi; Makoto Usui; Hiroyuki Yabuno

Yuichi Hashimoto; Yuji Takagi; Makoto Usui; Naohiro Kimura; Yoshikazu Yamamoto