Publication: IEICE TRANSACTIONS on Electronics Publication Date: 2010/08/01 Vol. E93-CNo. 8pp. 1279-1285 Type of Manuscript: Special Section PAPER (Special Section on Heterostructure Microelectronics with TWHM 2009) Category: III-V High-Speed Devices and Circuits Keyword: digital-to-analog converter (DAC), R-2R, current-steering, InP HBT,