DocumentCode :
1166765
Title :
2 GHz 
-Enhanced Active Filter With Low Passband Distortion and High Dynamic Range
-Enhanced Active Filter With Low Passband Distortion and High Dynamic RangeAuthor :
Georgescu, Bogdan ; Finvers, Ivars G. ; Ghannouchi, Fadhel
Author_Institution :
Dept. of Electr. & Comput. Eng., Calgary Univ., Alta.
Volume :
41
Issue :
9
fYear :
2006
Firstpage :
2029
Lastpage :
2039
Abstract :
A tunable Q-enhanced filter with low passband distortion is presented. The Q of the on-chip spiral inductors that form the filter resonators is enhanced by using a cross-coupled differential pair which is degenerated by a second LC tank. This technique allows for frequency dependent compensation of inductor losses and ensures that the Q-enhanced LC resonators have a frequency behaviour close to the ideal in the passband of the filter. The circuit allows DC voltage control of Q-enhancement. The filter centered at 2.0 GHz with a 130 MHz bandwidth is tunable in frequency by 3%, exhibits a -6.6 dBm 1-dB compression point and a 15 dB noise figure while consuming 17 mW of DC power. The circuit was fabricated in 0.18-mum CMOS and the performance was verified experimentally
Keywords :
CMOS integrated circuits; Q-factor; UHF filters; active filters; band-pass filters; circuit tuning; inductors; resonator filters; voltage control; 0.18 micron; 130 MHz; 15 dB; 17 mW; 2 GHz; DC voltage control; LC tank; Q-enhanced LC resonators; Q-enhanced active filter; compression point; cross-coupled differential pair; filter resonators; frequency dependent compensation; high dynamic range; low passband distortion; noise figure; on-chip spiral inductors; tunable Q-enhanced filter; Active filters; Band pass filters; Dynamic range; Frequency dependence; Inductors; Low pass filters; Passband; Resonator filters; Spirals; Tunable circuits and devices; RF active filter; dynamic range; passband distortion;
fLanguage :
English
Journal_Title :
Solid-State Circuits, IEEE Journal of
Publisher :
ieee
ISSN :
0018-9200
Type :
jour
DOI :
10.1109/JSSC.2006.880618
Filename :
1683894
Link To Document :
