A Monolithic HBT Broadband Amplifier Using Modified Triple Darlington Configuration

Lin, Chin-Shen ; Tsai, Ming-Da ; Wang, Huei ; Wang, Yu-Chi ; Chen, Chung-Hsu (2004) A Monolithic HBT Broadband Amplifier Using Modified Triple Darlington Configuration. In: Gallium Arsenide applications symposium. GAAS 2004, 11-12 ottobre, Amsterdam.

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Abstract

A broadband Darlington amplifier has been successfully developed using commercial 2- m GaAs HBT process. In contrast to conventional Darlington pair, a modified triple Darlington configuration is employed to achieve a bandwidth of half fT and equalizer-type matching network is used to substitute the conventional feedback for wide bandwidth. This circuit demonstrates a measured gain of 12.8 dB from 0.3 to 19 GHz.

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