Abstract

N-type large gate-width modulation-doped field-effect transistors (MODFETs) are fabricated on Si/SiGe modulation-doped heterostructure with fT and fmax of around 8 GHz and 20 GHz, respectively. These power devices demonstrate 15 to 16 dB power gain at 2 GHz, which make them suitable for low- and medium-power amplifiers for RF applications. We report here the RF modeling using small-signal equivalent circuit of these power devices. The extracted parameters are compared with prior work having similar gate length and the differences between this work and the previous one are discussed.

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