Title :
Integrated VIS SC filter with lattice reference structure
Author :
Br¿¿ckmann, D. ; Kleine, Ulrich
Author_Institution :
Ruhr-Universitÿt Bochum, Lehrstuhl fÿr Nachrichtentechnik, Bochum, West Germany
Abstract :
Symmetric VIS SC filters simulating reference filters in classical lattice configuration can be realised with less hardware. A fifth-order PCM lowpass with only three operational amplifiers has been designed and integrated in standard CMOS Si-gate technology. VIS SC lattice filters show excellent passband-sensitivity properties. Owing to the higher stopband sensitivity with respect to element tolerances, stopband attenuation requirements in excess of about 35¿40 dB can be satisfied only by cascading lower-order SC lattice filters.
Keywords :
field effect integrated circuits; low-pass filters; switched capacitor networks; switched filters; CMOS technology; IC; PCM low pass filter; VIS switched capacitor filters; cascading; classical lattice configuration; lattice reference structure; operational amplifiers; passband-sensitivity properties; reference filters; stopband attenuation; stopband sensitivity;
Journal_Title :
Electronics Letters
DOI :
10.1049/el:19840431
