Title :
Estimation of Aliasing Effects Due to Periodical Nonuniform Individual Sampling in High-Q Switched-Capacitor Filters
Author :
Hernandez-Garduno, David ; Silva-Martinez, Jose ; Ausin, José L.
Author_Institution :
Dept. of Electr. & Comput. Eng., Texas A&M Univ., College Station, TX
fDate :
5/1/2007 12:00:00 AM
Abstract :
The periodical nonuniform individual sampling scheme has been shown suitable for capacitance spread and total capacitor area reduction in high quality (Q) factor switched-capacitor (SC) filters. However, the use of periodical nonuniform clock signals results in additional aliasing components in the output spectrum. This paper presents a simple model to analyze the generation of such alias components and gives practical expressions to estimate their power. The results are verified through circuit simulation of a 10.7-MHz second-order SC bandpass filter in a 0.35-mum CMOS technology. Implications on the use of this technique in the design of intermediate-frequency filters are discussed
Keywords :
CMOS integrated circuits; Q-factor; band-pass filters; switched capacitor filters; 0.35 micron; 10.7 MHz; CMOS technology; SC networks; aliasing effects estimation; high quality factor; high-Q filters; intermediate frequency filters; intermediate-frequency filters; periodical nonuniform individual sampling; second-order bandpass filter; switched capacitor filters; Band pass filters; CMOS technology; Capacitance; Capacitors; Circuits; Clocks; Digital filters; Frequency; Robustness; Sampling methods; High-Q; SC networks; intermediate-frequency (IF) filters; periodical nonuniform individual sampling; switched-capacitor (SC) filters;
Journal_Title :
Circuits and Systems II: Express Briefs, IEEE Transactions on
DOI :
10.1109/TCSII.2006.890403
