2026-09-20T00:59:06Z https://www.ideals.illinois.edu/oai-pmh

oai:www.ideals.illinois.edu:2142/80930 2023-07-11 col_2142_5131 col_2142_8888 com_2142_5130 com_2142_8887 com_2142_234

Feng, Milton Lai, Jie-Wei 2015-09-25T20:08:53Z 2015-09-25T20:08:53Z 10000-01-01 2005 2005 This work describes a modeling approach including the nonlinear effects in the base-collector region covering current blocking, velocity modulation and self-heating. Model is verified in terms of single devices and integrated circuits. Good fitting to the measured DC and high-frequency data from single HBTs is achieved. In terms of circuit verification, high-gain and wideband variable gain amplifier (VGA) is developed using a negative-RE approach. This circuit shows a single-ended S21 of 18 dB and a 3-dB bandwidth of 50 GHz, producing a gain-bandwidth product of 397 GHz which is over two times of the value measured from the VGA designed by conventional method in the same process. Linearity is measured, and the model developed in this work shows the best prediction, which indicates that the nonlinear mechanisms inherent in InP/InGaAs DHBTs cannot be neglected. More design examples are provided with technology considerations, giving a complete discussion of designing very high-frequency circuits. Made available in DSpace on 2015-09-25T20:08:53Z (GMT). No. of bitstreams: 2 license.txt: 4848 bytes, checksum: 96035ab3f5e1c23cc7138a224ce498bd (MD5) 3199055.pdf: 2982190 bytes, checksum: 162ca042599dafc0c35b2b3d2531ca71 (MD5) Previous issue date: 2005 Embargo set by: Seth Robbins for item 82212 Lift date: Forever Reason: Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs Restricted to the U of I community idenfinitely during batch ingest of legacy ETDs U of I Only 103 p. Thesis (Ph.D.)--University of Illinois at Urbana-Champaign, 2005. http://hdl.handle.net/2142/80930 (MiAaPQ)AAI3199055 eng Engineering, Electronics and Electrical Large Signal HBT Model and Integrated Circuit Design Using 300-Ghz Indium Phosphide HBT Technology text Electrical Engineering Electrical Engineering University of Illinois at Urbana-Champaign Dissertation Ph.D.