A Si bipolar 5-Gb/s 8:1 multiplexer and 4.2-Gb/s 1:8 demultiplexer. - Masahiro Ohuchi; Toshihiko Okamura; Akihiro Sawairi; F. Kuniba; K. Matsumoto; Tsutomu Tashiro; S. Hatakeyama; K. Okuyama (IEEE J. Solid State Circuits, 1992)

Design method for optimal step size matrix of the affine projection algorithm using semidefinite programming. - K. Konishi; K. Okuyama; A. Kato; T. Furukawa (ISCAS (3), 2002)