Title :
Fully analogue LMS adaptive notch filter in BICMOS technology
Author :
Linder, Thomas ; Zojer, Herbert ; Seger, Berthold
Author_Institution :
Siemens Entwicklungszentrum fur Mikroelektronik, Villach, Austria
fDate :
1/1/1996 12:00:00 AM
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;
Journal_Title :
Solid-State Circuits, IEEE Journal of
