Single transistor fractional-order filter using a multi-walled carbon nanotube device

A low-pass fractional-order filter topology based on a single metal oxide semiconductor transistor is presented in this Letter. The filter is realized using a fractional-order capacitor fabricated using multi-walled carbon nanotubes. The electronic tuning capability of the filter’s frequency characteristics is achieved through a biasing current source. Experimental results are presented and compared with the theory. © 2019, Springer Science+Business Media, LLC, part of Springer Nature.