90-GHz Basedband Lumped Amplifier
26 October 2000
A broadband amplifier using InP/InGaAs single heterojunction HBT is presented. THis modified Darlington amplifier exhibits a low-frequency gain of 6.2dB with -3dB bandwidth of 90GHz. This wide bandwidth performance is compatible, or superior to other lumped or distributed amplifiers vased on HEMT and HBT technologies reported in literatures.