Title :
Second-Order State-Variable Filter with Current Operational Amplifiers
Author :
Kubanek, David ; Vrba, Kamil
Author_Institution :
Dept. of Telecommun., Brno Univ. of Technol., Brno
Abstract :
A design of the second-order filter based on the state-variable canonic structure is described. The filter operates in current mode and offers low-pass and band-pass transfer functions simultaneously. Current operational amplifiers are used as main active building blocks. An analysis of the influence of amplifier real properties on the filter characteristics is presented. The shifts of filter poles and appearance of new parasitic zeros is observed. Computer simulation with a bipolar model of current operational amplifier was used for verification of the filter functionality.
Keywords :
band-pass filters; low-pass filters; operational amplifiers; transfer functions; active building blocks; band-pass transfer functions; computer simulation; current operational amplifiers; low-pass transfer functions; second-order state-variable filter; state-variable canonic structure; Active circuits; Band pass filters; Bandwidth; Electronic mail; Feedback; Frequency; Operational amplifiers; Poles and zeros; Transfer functions; Voltage; Active filter; Current mode; Current operational amplifier;
Conference_Titel :
Systems, 2008. ICONS 08. Third International Conference on
Conference_Location :
Cancun
Print_ISBN :
978-0-7695-3105-2
Electronic_ISBN :
978-0-7695-3105-2
DOI :
10.1109/ICONS.2008.26
