Analog Inverse Filters Using OTAs

Abstract

In this paper three new tunable voltage-mode analog inverse filter circuits using operational transconductance amplifiers (OTAs) and fractional capacitors (FCs) are presented. The proposed structures realize fractional order inverse high pass filter response, fractional order inverse band pass filter response and fractional order inverse band elimination filter response employing three single output OTAs and two FCs. The workability of these inverse filter configurations has been confirmed through Cadence Virtuoso simulation tool using $0.18 \mu \mathrm{m}$ CMOS technology parameters.