DocumentCode :
1182790
Title :
Active filters with zero transfer function sensitivity with respect to the time constants of operational amplifiers
Author :
Budak, Aram ; Wullink, Gerhard ; Geiger, Randall L.
Volume :
27
Issue :
10
fYear :
1980
fDate :
10/1/1980 12:00:00 AM
Firstpage :
849
Lastpage :
854
Abstract :
Most second-order RC active filters show a marked dependence on the gain-bandwidth product (GB) of operational amplifiers (OA\´s) when the 
to be realized is greater than 1 percent of GB and 
. Here designs are given that are virtually independent of OA\´s when 
GB and 
. Even for 
GB and 
, the center frequency shift due to OA\´s is less than 0.1 percent. This desirable result is achieved by designing filter amplifiers which have zero first-order sensitivities with respect to the time constant 
of the OA\´s used in the design. As a result, the filter transfer function has also zero first-order sensitivity with respect to 
. General criteria for such designs are given. Experimental results show excellent agreement with theory.
to be realized is greater than 1 percent of GB and . Here designs are given that are virtually independent of OA\´s when GB and . Even for GB and , the center frequency shift due to OA\´s is less than 0.1 percent. This desirable result is achieved by designing filter amplifiers which have zero first-order sensitivities with respect to the time constant of the OA\´s used in the design. As a result, the filter transfer function has also zero first-order sensitivity with respect to . General criteria for such designs are given. Experimental results show excellent agreement with theory.Keywords :
Active filters; Active filters, RC; Network sensitivity optimization; Active filters; Bandwidth; Circuits; Frequency; Impedance; Operational amplifiers; Resistors; Transfer functions;
fLanguage :
English
Journal_Title :
Circuits and Systems, IEEE Transactions on
Publisher :
ieee
ISSN :
0098-4094
Type :
jour
DOI :
10.1109/TCS.1980.1084725
Filename :
1084725
Link To Document :
