Tomoaki Hirai | Researchain

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Featured researches published by Tomoaki Hirai.

international solid-state circuits conference | 1996

A 150 Mb/s PRML chip for magnetic disk drives

Seiichi Mita; Yasuhide Ouchi; Terumi Takashi; Nobuo Sato; H. Aoi; Satoshi Minoshima; Tomoaki Hirai; Hideki Miyasaka; Ryushi Shimokawa; T. Matsuura; Hideki Sawaguchi; Shoichi Miyazawa; K. Hikasa

Recent magnetic disk drives require high transfer rates and recording densities. PRML signaling is now prevalent in digital read/write channels. This PRML chip operates at a maximum data rate of 150 Mb/s with 1550 mW and includes all basic functions such as servo demodulation and write pre-compensation for magnetic disk drives with optimized circuit size. The chip is fabricated in 0.7 /spl mu/m double-poly double-metal BICMOS suitable for low-power devices and is packed in a 100-pin quad flat package with a die approximately 7 mm/sup 2/. This chip has a single 5 V power supply.

Archive | 2002

Signal processing circuit and information recording/reproducing apparatus using the same, and method for optimizing coefficients of equalizer circuit

Naoki Satoh; Seiichi Mita; Shoichi Miyazawa; Terumi Takashi; Yosuke Hori; Yoshiju Watanabe; Akihiko Hirano; Satoshi Minoshima; Hideki Miyasaka; Toshihiro Nitta; Tomoaki Hirai; Ryushi Shimokawa; Koji Shida; Yasuhide Ouchi

Archive | 1994

Read and/or write integrated circuit having an operation timing adjusting circuit and constant current elements

Masaki Yoshinaga; Yuji Nagaya; Tsuyoshi Hirose; Noriaki Hatanaka; Tomoaki Hirai; Tatsuo Mochizuki

Archive | 1993

Magnetic head circuit having a write current changeover circuit with a clamp voltage depending on write current for high-speed data transfer

Masaki Yoshinaga; Noriaki Hatanaka; Tomoaki Hirai; Yuji Nagaya; Tsuyoshi Hirose; Tadao Kaji

Archive | 1995

Information recording and reproducing device and signal processing circuit

Tomoaki Hirai; Akihiko Hirano; Yosuke Hori; Satoshi Minojima; Seiichi Mita; Hideki Miyasaka; Shoichi Miyazawa; Toshihiro Nitta; Yasuhide Ouchi; Naoki Sato; Koji Shida; Ryushi Shimokawa; Terumi Takashi; Yoshihisa Watabe; 誠一三田; 龍志下川; 直喜佐藤; 洋介堀; 康英大内; 秀樹宮坂; 章一宮沢; 智明平井; 章彦平野; 光司志田; 敏裕新田; 善寿渡部; 智美濃島; 輝実高師

Archive | 2007

Method using capacitive sensors for morphology discrimination of a passenger seating in an automotive seat

Claude Launay; Tomoaki Hirai; Joaquim Da Silva; Florent Voisin; Takanori Ninomiya; Shunji Maeda

Archive | 2007

Method for determining the morphology of an occupant in an automotive seat with capacitive sensors

Claude Launay; Joaquim Da Silva; Florent Voisin; Tomoaki Hirai; Takanori Ninomiya; Shunji Maeda

Archive | 2000

SIGNAL PROCESSING CIRCUIT AND INFORMATION RECORDING AND REPRODUCING DEVICE

Tomoaki Hirai; Akihiko Hirano; Yosuke Hori; Satoshi Minojima; Seiichi Mita; Hideki Miyasaka; Shoichi Miyazawa; Toshihiro Nitta; Yasuhide Ouchi; Naoki Sato; Koji Shida; Tatsushi Shimokawa; Terumi Takashi; Yoshihisa Watabe; 誠一三田; 龍志下川; 直喜佐藤; 洋介堀; 康英大内; 秀樹宮坂; 章一宮沢; 智明平井; 章彦平野; 光司志田; 敏裕新田; 善寿渡部; 智美濃島; 輝実高師

Archive | 2007