Premium
A predistortion technique for RC ‐active biquadratic filters
Author(s) -
Goodman Ken,
Zurada Jacek
Publication year - 1983
Publication title -
international journal of circuit theory and applications
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.364
H-Index - 52
eISSN - 1097-007X
pISSN - 0098-9886
DOI - 10.1002/cta.4490110305
Subject(s) - predistortion , control theory (sociology) , amplifier , bandwidth (computing) , transfer function , mathematics , electronic engineering , computer science , engineering , telecommunications , electrical engineering , control (management) , artificial intelligence
A general method of forcing the transfer function of a biquadratic active filter to have poles/zeros in the desired locations is presented. Examples of the required calculations are shown. an example predistortion of a Thomas‐Tow section has been performed, and the resulting predistorted natural frequency and selectivity are presented graphically for a wide range of q ‐factors and amplifier gain‐bandwidth products. the technique has also been applied to the point‐by‐point predistortion of a digitally tuneable filter. the general predistortion method has been used to obtain estimates of frequency and selectivity errors in non‐predistorted filters. the expression for relative q errors agrees with previous high‐ q approximations of this error.