Title :
A sparing SC filter design approach with reduced transmission zeros
Author :
Silva-Martínez, José ; Sánchez-Sinencio, Edgar
Author_Institution :
Dept. of Electr. Eng., Texax A&M Univ., College Station, TX, USA
Abstract :
A systematic switched-capacitor (SC) filter design method that satisfies a set of frequency specifications while its implementation requires less total capacitance than the conventional design using the bilinear mapping is presented. The design approach is based on: (i) a prewarping scheme for different mappings of the 1/s and 1/s/sup 2/ terms of each biquadratic factor forming the transfer function; (ii) strategic addition of zeros at z=-1; and (iii) iterative modification of the frequency responses rendering different transfer functions that eventually satisfy the original frequency design specifications. A detailed algorithm is discussed together with an examples showing the attractive properties of the proposed method.<>
Keywords :
frequency response; network synthesis; poles and zeros; switched capacitor filters; transfer functions; SC filter; active filters; design method; frequency design specifications; frequency responses; iterative modification; prewarping scheme; transfer function; transmission zeros reduction; Amplitude modulation; Band pass filters; Bandwidth; Capacitance; Design methodology; Filtering theory; Frequency; Iterative algorithms; Low pass filters; Transfer functions;
Conference_Titel :
Circuits and Systems, 1988., IEEE International Symposium on
Conference_Location :
Espoo, Finland
DOI :
10.1109/ISCAS.1988.15267
