Large Signal HBT Model and Integrated Circuit Design Using 300-Ghz Indium Phosphide HBT Technology

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.

Name thesis:degree_name

Ph.D.

Level thesis:degree_level

Dissertation

Discipline thesis:degree_discipline

Electrical Engineering

Grantor

University of Illinois at Urbana-Champaign

Year dc:date

2015

Author dc:creator

• Lai, Jie-Wei

Contributors dc:contributor

• Feng, Milton

• Engineering, Electronics and Electrical

Language dc:language

eng

Identifier

(MiAaPQ)AAI3199055

OAI identifier oai:identifier

oai:www.ideals.illinois.edu:2142/80930