Fully analogue LMS adaptive notch filter in BICMOS technology

Author

Linder, Thomas ; Zojer, Herbert ; Seger, Berthold

Author_Institution

Siemens Entwicklungszentrum fur Mikroelektronik, Villach, Austria

Volume

31

Issue

1

fYear

1996

fDate

1/1/1996 12:00:00 AM

Firstpage

61

Lastpage

69

Abstract

A fully analogue adaptive notch filter for meter pulse applications in analogue subscriber line systems is presented. The filter is part of an integrated circuit which includes both low voltage subscriber line interface circuit- (SLIC)- and CODEC-filter functions. The effects of offset, noise, and transient behavior are investigated, and a linear model for stability analysis is derived. Fabricated in a 1 μm BiCMOS technology this circuit uses the benefits of accurate SC-filters, low offset comparators, and linear multipliers. Due to the adaptive approach the performance of the filter is independent of process deviations and temperature effects. The filter has been designed for an attenuation of 50 dB @ 12 or 16 kHz, a dynamic range of 103 dB and a settling time of less than 5 ms

Keywords

BiCMOS analogue integrated circuits; adaptive filters; least mean squares methods; notch filters; subscriber loops; 1 micron; 12 kHz; 16 kHz; BICMOS technology; CODEC-filter; LMS algorithm; SC-filters; analogue subscriber line systems; attenuation; comparators; dynamic range; fully analogue adaptive notch filter; integrated circuit; linear model; linear multipliers; low voltage SLIC; meter pulse applications; noise; offset; settling time; stability analysis; transients; Adaptive filters; Attenuation; BiCMOS integrated circuits; Integrated circuit noise; Integrated circuit technology; Least squares approximation; Low voltage; Stability analysis; Temperature; Transient analysis;

fLanguage

English

Journal_Title

Solid-State Circuits, IEEE Journal of

Publisher

ieee

ISSN

0018-9200

Type

jour

DOI

10.1109/4.485866

Filename

485866