Title :
Analysis of different feedback topologies to LNA input matching
Author :
Kaltiokallio, Mikko ; Kaukovuori, Jouni ; Ryynänen, Jussi
Author_Institution :
Electron. Circuit Design Lab., Helsinki Univ. of Technol. Espoo, Espoo
Abstract :
This paper describes the analysis of different feedback topologies to LNA input matching. The effect of different components to LNA input impedance is discussed. Analyzed feedback topologies can also be used to eliminate the source inductor found in IDCS LNA and feedback can be used to achieve matching in packaged LNA where the bond wire is no longer a free design parameter. A design example, using a 1.2-V 65-nm CMOS process, is given for a packaged LNA to demonstrate that adequate performance can be achieved using the presented theory and topologies.
Keywords :
feedback; low noise amplifiers; topology; LNA input impedance; LNA input matching; feedback topology; low noise amplifiers; source inductor; Bonding; Capacitance; Circuit topology; Feedback; Frequency; Impedance matching; Inductors; Packaging; Wideband; Wire;
Conference_Titel :
Circuit Theory and Design, 2007. ECCTD 2007. 18th European Conference on
Conference_Location :
Seville
Print_ISBN :
978-1-4244-1341-6
Electronic_ISBN :
978-1-4244-1342-3
DOI :
10.1109/ECCTD.2007.4529538
