Design of low complexity Universal Bi-quadratic Filters using Current Feedback Amplifier

Abstract

Universal Bi-quadratic Filters (UBF) are popular because of its versatility in realizing any type of filter desired by the user. This manuscript deals with designing low complexity voltage mode UBF using Current Feedback Amplifier (CFA). Three new circuits are reported. The attractive features of these circuits include: employment of grounded capacitors, orthogonal adjustment of frequency response parameters and absence of constraints related to the input signals. The proposed circuits implement the design of high-pass, low-pass filters of resonance frequency 100kHz with Q-factor 1. It also implements band-pass filter of resonance frequency 100kHz with bandwidth 10kHz and Q-factor 1. Notch filter of rejection frequency 100kHz and Q-factor 1 is also implemented. Comparative results achieved with theoretical computation of the resonance frequency and quality factor matches with that achieved with implementation of the circuits on LTSPICE.