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

fYear

1988

fDate

7-9 June 1988

Firstpage

1721

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;

fLanguage

English

Publisher

ieee

Conference_Titel

Circuits and Systems, 1988., IEEE International Symposium on

Conference_Location

Espoo, Finland

Type

conf

DOI

10.1109/ISCAS.1988.15267

Filename

15267