Universal Current-Mode OTA-C KHN Biquad
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Universal Current-Mode OTA-C KHN Biquad

Authors: Dalibor Biolek, Viera Biolková, Zden─øk Kolka


A universal current-mode biquad is described which represents an economical variant of well-known KHN (Kerwin, Huelsman, Newcomb) voltage-mode filter. The circuit consists of two multiple-output OTAs and of two grounded capacitors. Utilizing simple splitter of the input current and a pair of jumpers, all the basic 2nd-order transfer functions can be implemented. The principle is verified by Spice simulation on the level of a CMOS structure of OTAs.

Keywords: Biquad, current mode, OTA.

Digital Object Identifier (DOI): doi.org/10.5281/zenodo.1331747

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