Paper Info
Title
Reconfigurable SiGe Low-Noise Amplifiers With Variable Miller Capacitance
Abstract
A new input matching method making use of shunt-shunt feedback capacitance is introduced. Based on the new input matching method, reconfigurable SiGe low-noise amplifiers (LNAs) by varying shunt-shunt feedback capacitance are proposed. Two approaches are used to vary the shunt-shunt feedback capacitance. One approach is to switch between two different bias currents while the other is to use a series combination of a switch and a capacitor. Miniaturized fully monolithic reconfigurable SiGe LNAs without emitter degenerative inductors were realized by the above two approaches. The reconfigurable SiGe LNA achieved by switching bias currents only occupies a very small area of 355 mumtimes155 mum, excluding measurement pads. This LNA achieves an input return losses (S11) of -27.6 dB, a voltage gain (A v) of 19.8 dB, and a noise figure (NF) of 3.18 dB for 2.4-GHz band when biased at a current of 3.8 mA and can be reconfigured to obtain Av=20.4/20.3 dB, S11=-47.1/-24.6 dB and NF=3.42/3.21 dB for 5.2/5.7-GHz band when bias current is switched to 3 mA. In addition, a 2.4/4.9/5.2/5.7-GHz reconfigurable SiGe LNAs for WLAN applications, whose variable shunt-shunt feedback capacitance is controlled by a switch and a capacitor, was also realized
Year
DOI
Venue
2006
10.1109/TCSI.2006.883846
IEEE Trans. on Circuits and Systems
Keywords
Field
DocType
low-noise amplifier (lna),cmos,sige,index terms—bicmos,multiband,bicmos,low-noise amplifier lna,sige.,reconfigurable,low noise amplifier,noise figure,impedance matching
BiCMOS,Capacitance,Capacitor,Impedance matching,Inductor,Noise figure,CMOS,Electronic engineering,Electrical engineering,Mathematics,Amplifier
Journal
Volume
Issue
ISSN
53
12
1549-8328
Citations 
PageRank 
References 
4
0.60
0
Authors
6
Name
Order
Citations
PageRank
Yu-Che Yang14711.33
Po-Wei Lee2282.81
Hung-Wei Chiu3194.13
Yo-Sheng Lin45117.13
Guo-Wei Huang5143.04
Shey-Shi Lu613328.72