Analytical modeling methodology for ultrawideband low noise amplifiers with generalized filter-based impedance matching

Authors:
Hamid Nejati;Tamer Ragheb;Arthur Nieuwoudt;Yehia Massoud
Affiliations:
Department of Electrical and Computer Engineering, Rice University, Houston, USA 77005;Department of Electrical and Computer Engineering, Rice University, Houston, USA 77005;Department of Electrical and Computer Engineering, Rice University, Houston, USA 77005;Department of Electrical and Computer Engineering, Rice University, Houston, USA 77005
Venue:
Analog Integrated Circuits and Signal Processing
Year:
2007

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Abstract

In this paper, we present a modeling methodology for fully integrated inductively degenerated cascode ultrawideband low noise amplifiers (LNA) with generalized filter-based impedance matching networks. Our accurate analytical models capture the impact of device and passive component parasitics and transistor short channel effects to generate accurate designs. Utilizing our methodology, we are able to accurately generate an ultrawideband LNA in the 3.1---10.6 GHz frequency band using third and fifth order Chebyshev filters as input impedance matching networks. The speed and accuracy of the proposed analytical model will facilitate rapid design space exploration for ultrawideband LNAs.