Minimum Component Based First-Order Inverting and Non-inverting Outputs of All-Pass Filter at the Same Circuit

TL;DR

This paper introduces a novel voltage-mode all-pass filter circuit that uses minimal components, including a grounded capacitor, and can produce both inverting and non-inverting outputs simultaneously, suitable for integrated circuits.

Contribution

It presents a new all-pass filter design employing a single FDCCII, grounded capacitor, and resistor, enabling dual outputs without component matching, validated by PSPICE simulations.

Findings

Uses only grounded capacitor for easy IC integration

Provides both inverting and non-inverting outputs simultaneously

Exhibits low sensitivities and no component matching requirements

Abstract

In this paper, a new voltage-mode first order all-pass filter using minimum active and passive components is presented. The proposed circuit employs one fully differential second generation current conveyor (FDCCII), one grounded capacitor, one resistor and offers the following advantages: the use of only grounded capacitor which is attractive for integrated circuit implementation, low active and passive sensitivities, providing inverting and non-inverting voltage-mode all-pass responses simultaneously from the single circuit and no requirement for component matching conditions. The theory is validated through PSPICE simulation using TSMC 0.35micrometer CMOS process parameters.