Active F ilte rs with Zero T ransfer Function Sensitivity with Respect to the T ime
نویسنده
چکیده
Abstmcr-Most second-order RC active filters show II marked dependence on tbe gdn-bnndwidtb product (GB) of operational aniplifietx (OA’s) when the w, to be reali& is greater than 1 percent of GB and Q> 10. Here designs are given that are. virtually independent of OA’s when we<O.Ol GB and Q< 10. Even for w0=0.05 GB and Q=lO, the center frequency shift due to OA’s is less than 0.1 percent. ‘Ihis desirable rrsultisaehievedbydesigniog~terampUnerswhiebhavezeroflrst~ sensitlvIties with respect to the time constant T= l/GB of the OA’s wed in tbe design. As a resldh the futex tlamfer function has also zero first-order~~~~withrespeetto~.Genemlcritericrf~or~ nre glven. Expehnental results show exwllent agreement with theory.
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تاریخ انتشار 1999