Title :
Design optimisation of HBT broadband distributed amplifiers
Author :
Koon, K.L. ; Hu, Zhirun ; Rezazadeh, A.A. ; Marsh, Steve
Author_Institution :
Dept. of Electron. & Electr. Eng., King´´s Coll., London, UK
Abstract :
Microwave simulation of heterojunction bipolar transistor (HBT) distributed amplifiers is carried out by separating the HBT equivalent circuit into base and collector transmission line circuits. The characteristics of the base and collector equivalent circuit are evaluated by analysing each individual device parameter. The optimal values of Rbe, Rbb and Cbe have been obtained through the analysis. The relevance of feedback base collector capacitance (Cbc) has also been considered in order to improve the gain-bandwidth product for an ultra broadband amplification
Keywords :
circuit feedback; circuit optimisation; distributed amplifiers; equivalent circuits; optical fibre communication; optical receivers; wideband amplifiers; HBT broadband distributed amplifiers; HBT equivalent circuit; base transmission line circuits; collector transmission line circuits; design optimisation; device parameter; feedback base collector capacitance; gain-bandwidth product; microwave simulation; optical fibre communication; ultra broadband amplification; Broadband amplifiers; Capacitance; Design optimization; Distributed amplifiers; Distributed parameter circuits; Equivalent circuits; Filters; Gallium arsenide; Heterojunction bipolar transistors; Optical amplifiers;
Conference_Titel :
Electron Devices for Microwave and Optoelectronic Applications, 2001 International Symposium on
Conference_Location :
Vienna
Print_ISBN :
0-7803-7049-X
DOI :
10.1109/EDMO.2001.974321
