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Base coupled differential amplifier: a new topology for RF integrated LNA
Author(s) -
Pascoli S. Di,
Fanucci L.,
Neri B.,
Zito D.
Publication year - 2003
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.237
Subject(s) - linearity , topology (electrical circuits) , amplifier , electronic engineering , biasing , network topology , electrical engineering , inductor , noise figure , impedance matching , electrical impedance , low noise amplifier , voltage , engineering , computer science , cmos , operating system
Abstract A new topology of bipolar low noise amplifier (LNA) for RF applications, named base coupled differential (BCD), is presented. The proposed approach is compared by simulation against most classical topologies. The BCD configuration has the key advantage to join an integrated matching on a single‐ended input with a differential output. This is done by using down‐bond wiring, so that no integrated inductors are needed. The main advantages of this new topology are a drastic area reduction and an increased linearity range (or a reduced biasing current with the same linearity) together with a noise figure (NF) and voltage supply reduction. Particularly, the BCD LNA presented in this paper has been designed for 2.44GHz frequency operation. It is characterized by a NF of 1.93dB, a voltage gain (Av) of 19.5dB, an input impedance of 50Ωa third Input‐referred Intercept Point (IIP3) of ‐7.25dBm and a dissipated power (PD) equal to 19mW. Copyright © 2003 John Wiley & Sons, Ltd.