Adaptive filter implementation using switched-current technique

Author

de la Vega, Alexandre S. ; De Queiroz, Antdnio C M ; Diniz, Paulo S R

Author_Institution

Univ. Federal Fluminense, Niteroi, Brazil

Volume

1

fYear

2001

Firstpage

17

Abstract

A CMOS switched-current adaptive filter architecture is presented. It is basically a finite impulse response (FIR) transversal filter adapted by using the Least-Mean-Square (LMS) adaptation algorithm. The design is based on delay and multiply-accumulator blocks. The implemented system can be switched to work either as an adaptive filter or as an FIR programmable filter. The adaptation signal can also be switched to allow for external control. Simulation results from a 4-tap FIR-LMS adaptive filter are also presented

Keywords

CMOS integrated circuits; FIR filters; adaptive filters; circuit simulation; delay circuits; least mean squares methods; mixed analogue-digital integrated circuits; multiplying circuits; programmable filters; switched current circuits; CMOS; FIR programmable filter; adaptive filter implementation; delay blocks; external control; finite impulse response transversal filter; least-mean-square adaptation algorithm; multiply-accumulator blocks; simulation results; switched-current technique; Adaptive filters; Convergence; Delay; Electronic mail; Equations; Finite impulse response filter; Least squares approximation; Output feedback; Switches; Transversal filters;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 2001. ISCAS 2001. The 2001 IEEE International Symposium on

Print_ISBN

0-7803-6685-9

Type

conf

DOI

10.1109/ISCAS.2001.921777

Filename

921777