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Featured researches published by Tadao Aikawa.


international solid-state circuits conference | 1997

A 256 Mb SDRAM using a register-controlled digital DLL

Atsushi Hatakeyama; Hirohiko Mochizuki; Tadao Aikawa; Masato Takita; Yuki Ishii; Hironobu Tsuboi; Shinya Fujioka; Shusaku Yamaguchi; Makoto Koga; Yuji Serizawa; Koichi Nishimura; Kuninori Kawabata; Yoshinori Okajima; Michiari Kawano; Hideyuki Kojima; Kazuhiro Mizutani; Toru Anezaki; Masatomo Hasegawa; Masao Taguchi

This 256 Mb synchronous DRAM with 1 ns clock access is stable against temperature, voltage, and process variation by use of an innovative register-controlled delay locked loop (RDLL). Unlike most conventional high-density DRAMs, the bit-lines are placed above the storage capacitors in this DRAM to relax design rules of the core area. The noise issues are analyzed and resolved to help implement the technology in mass production of 0.28 to 0.24 /spl mu/m 200 MHz DRAMs.


Archive | 1999

Semiconductor memory device operating in synchronization with a clock signal for high-speed data write and data read operations

Yasuharu Sato; Tadao Aikawa; Shinya Fujioka; Waichiro Fujieda; Hitoshi Ikeda; Hiroyuki Kobayashi


Archive | 2001

Semiconductor memory device outputting data according to a first internal clock signal and a second internal clock signal

Tadao Aikawa


Archive | 1999

Semiconductor integrated circuit memory

Shinya Fujioka; Masao C O Fujitsu Limited Taguchi; Yasuharu Sato; Takaaki Suzuki; Tadao Aikawa; Yasurou Matsuzaki; Toshiya Uchida


Archive | 2005

Semiconductor apparatus having a large-size bus connection

Yasurou Matsuzaki; Yasuharu Sato; Tadao Aikawa; Masafumi Yamazaki; Takaaki Suzuki


Archive | 2004

Resistance compensation method, circuit having a resistance compensation function, and circuit resistance test method

Hiroshi Miyake; Noriyuki Tokuhiro; Tadao Aikawa; Hiroshi Miyazaki


Archive | 1997

Semiconductor memory device with reduced power consumption

Waichirou Fujieda; Shinya Fujioka; Tadao Aikawa


Archive | 1999

Data output circuits for semiconductor memory devices

Tadao Aikawa; Yasuharu Sato; Hiroyuki Kobayashi; Waichirou Fujieda


Archive | 1997

Semiconductor memory device having a dummy cell resetting the bit lines to a reset potential that is based on data read in a previous read data

Yoshihiro Takemae; Masao Taguchi; Masao Nakano; Hirohiko Mochizuki; Hiroyoshi Tomita; Yasurou Matsuzaki; Tadao Aikawa


Archive | 2003

Associative memory circuit judging whether or not a memory cell content matches search data by performing a differential amplification to a potential of a match line and a reference potential

Tadao Aikawa

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