Title :
Switched-capacitor adaptive sampling rate notch filter for enhancement and elimination of bandpass signals
Author :
Bustamante, Luis G. ; Strandberg, Richard H. ; Soderstrand, Michael A.
Author_Institution :
Dept. of Electr. & Comput. Eng., California Univ., Davis, CA, USA
Abstract :
An adaptive filter capable of tracking, eliminating, and enhancing narrow band signals is described. The system relies on the property of Switched-Capacitors (SC) of having pole frequencies proportional to the sampling rate of its switches. The filter tracks the peak of the spectral density function of the input signal by adapting the sampling clock of the switched-capacitors. A prototype was built using discrete components but it can also be realized in a CMOS integrated circuit.
Keywords :
CMOS analogue integrated circuits; adaptive filters; band-pass filters; notch filters; sampled data filters; switched capacitor filters; CMOS integrated circuit; adaptive sampling rate filter; bandpass signals; narrow band signals; notch filter; pole frequencies; sampling clock; sampling rate; spectral density function; switched-capacitor filter; Adaptive filters; Band pass filters; CMOS integrated circuits; Clocks; Density functional theory; Frequency; Narrowband; Prototypes; Sampling methods; Switches;
Conference_Titel :
Circuits and Systems, 1997. Proceedings of the 40th Midwest Symposium on
Print_ISBN :
0-7803-3694-1
DOI :
10.1109/MWSCAS.1997.662333
