Akira OHTA

A Low Quiescent Current CV/CC Parallel Operation HBT Power Amplifier for W-CDMA Terminals
Shintaro SHINJO  Kazutomi MORI  Hiro-omi UEDA  Akira OHTA  Hiroaki SEKI  Noriharu SUEMATSU  Tadashi TAKAGI 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2003/08/01
Vol. E86-C  No. 8  pp. 1444-1450
Type of Manuscript: Special Section PAPER (Special Issue on Microwave and Millimeter Wave Technology)
Category: 
Keyword: 
microwave,  power amplifier,  heterojunction bipolar transistor (HBT),  inductor base feed,  resistor base feed, 
  Summary |  Full Text:PDF (1.6MB)
An L-Band High Efficiency and Low Distortion Multi-Stage Amplifier Using Self Phase Distortion Compensation Technique
Yukio IKEDA  Kazutomi MORI  Shintaro SHINJO  Fumimasa KITABAYASHI  Akira OHTA  Tadashi TAKAGI  Osami ISHIDA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/12/01
Vol. E85-C  No. 12  pp. 1967-1972
Type of Manuscript: Special Section PAPER (Special Issue on Low-Distortion,High-Power,High-Efficiency Active Device and Circuit Technology)
Category: 
Keyword: 
microwave,  amplifier,  transistor,  PHEMT,  distortion,  efficiency, 
  Summary |  Full Text:PDF (1.1MB)
Electromigration and Diffusion of Gold in GaAs IC Interconnections
Akira OHTA  Kotaro YAJIMA  Norio HIGASHISAKA  Tetsuya HEIMA  Takayuki HISAKA  Ryo HATTORI  Yoshikazu NAKAYAMA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 2002/11/01
Vol. E85-C  No. 11  pp. 1932-1939
Type of Manuscript: PAPER
Category: Semiconductor Materials and Devices
Keyword: 
electromigration,  diffusion,  GaAs IC,  high temperature,  high current density, 
  Summary |  Full Text:PDF (2MB)
High-Efficiency 0.1 cc Power Amplifier Module for 900 MHz Personal Digital Cellular Telephones
Akira INOUE  Akira OHTA  Takahiro NAKAMOTO  Shigeki KAGEYAMA  Toshiaki KITANO  Hideaki KATAYAMA  Toshikazu OGATA  Noriyuki TANINO  Kazunao SATO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1999/11/20
Vol. E82-C  No. 11  pp. 1906-1912
Type of Manuscript: Special Section PAPER (Special Issue on High-Frequency/High-Speed Devices for Information and Communication Systems in the 21st Century)
Category: RF Power Devices
Keyword: 
microwave power amplifier,  microwave power transistor,  power efficiency, 
  Summary |  Full Text:PDF (1.6MB)
GaAs 10 Gb/s 64:1 Multiplexer/Demultiplexer Chip Sets
Masaaki SHIMADA  Norio HIGASHISAKA  Akira OHTA  Kenji HOSOGI  Kazuo KUBO  Noriyuki TANINO  Tadashi TAKAGI  Fuminobu HIDANI  Osamu ISHIHARA 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1996/04/20
Vol. E79-C  No. 4  pp. 503-511
Type of Manuscript: Special Section PAPER (Special Issue on Ultra-High-Speed LSIs)
Category: 
Keyword: 
multiplexer,  demultiplexer,  GaAs,  10 Gb/s,  SCFL,  DCFL, 
  Summary |  Full Text:PDF (1MB)
Low Power Dissipation GaAs DCFL 2.5 Gbps 16-bit Multiplexer/Demultiplexer LSIs
Norio HIGASHISAKA  Masaaki SHIMADA  Akira OHTA  Kenji HOSOGI  Kazuo KUBO  Noriyuki TANINO 
Publication:   IEICE TRANSACTIONS on Electronics
Publication Date: 1995/09/20
Vol. E78-C  No. 9  pp. 1195-1202
Type of Manuscript: Special Section PAPER (Special Issue on Ultra-High-Speed Electron Devices)
Category: 
Keyword: 
MUX,  DEMUX,  GaAs,  2.5 Gbps,  power, 
  Summary |  Full Text:PDF (912.8KB)