Premium
Mapping duality as a means to allow finite β F compensation in bipolar log filters
Author(s) -
Callegari Sergio,
Setti Gianluca
Publication year - 2000
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 - 10.1002/1097-007x(200007/08)28:4<335::aid-cta110>3.0.co;2-s
Subject(s) - compensation (psychology) , duality (order theory) , capacitor , exponential function , electronic engineering , band pass filter , filter (signal processing) , computer science , differential (mechanical device) , power (physics) , network synthesis filters , topology (electrical circuits) , control theory (sociology) , voltage , mathematics , electrical engineering , engineering , physics , discrete mathematics , mathematical analysis , psychology , control (management) , quantum mechanics , aerospace engineering , artificial intelligence , psychoanalysis , computer vision
Log‐domain filters are a promising design paradigm for analog signal processing. They achieve tunability and operation up to high frequencies, with voltage and power requirements typically better than those of conventional filtering architectures. Implementation can be based only on capacitors, current sources and an exponential, differential V / I converter referred to as the E‐cell. Non‐idealities in the E‐cell, like the presence of non‐negligible input currents due to finite β F , can reduce system performance. The aim of this paper is to investigate E‐cell‐based design strategies and to introduce a duality principle whose exploitation can allow finite β F compensation. As a validation, HSPICE simulation results are illustrated for a second‐order bandpass filter. Copyright © 2000 John Wiley & Sons, Ltd.