A New Voltage-Mode Universal Biquadratic Filter Using Single UVC

Kanhaiya Lal Pushkar,Pinky Vivek,Kavya Gupta

doi:10.4236/cs.2017.812020

Abstract

The paper presents a new universal biquadratic filter using single universal voltage conveyor (UVC), two resistors and two capacitors. The offered structure has three inputs and one output and can realise all the five basic biquadratic filters: high-pass (HP), low-pass (LP), band-reject (BR), band-pass (BP) and all-pass (AP) from the same circuit topology. The proposed universal filter also provides following advantageous features, not available simultaneously in any UVC based universal biquadratic filter so far: (i) low active and passive sensitivities, (ii) independent control of natural frequency (ω0) and bandwidth (BW) and (iii) no requirement of any component matching condition and inversion of input signal(s) (as needed in most of the earlier reported structures). The workability of proposed structure has been presented by SPICE (Version 16.5) simulation using 0.18 μm TSMC technology.

Highlights

Interest in the design of multi-input single-output (MISO) or single-input multioutput (SIMO), current-mode (CM) or voltage-mode (VM) universal filter configurations have been emerging, due to their flexibility and versatility for practical applications [1]
Filter structures presented in references [8] [9] are unable to realize all the basic biquadratic filter functions from single topology (i.e. LP, HP, BP, BR and AP)
The voltage and current values selected for CMOS implementation of universal voltage conveyor (UVC) are ±1.9 V and 100 μA, respectively

Summary

Introduction

Interest in the design of multi-input single-output (MISO) or single-input multioutput (SIMO), current-mode (CM) or voltage-mode (VM) universal filter configurations have been emerging, due to their flexibility and versatility for practical applications [1]. In ref [8], Herenscar, Koton and Vrba have presented multi-. In ref [9], Minarcik and Vrba have proposed three multi-function filter structures: i) realize three basic filters i.e. LP, HP, and BP using three UVCs ii) realize four basic filters i.e. LP, HP, BP and, AP using two UVCs which can iii) four basic filters i.e. LP, HP, BP and, AP, employing single UVC. Filter structures presented in references [8] [9] are unable to realize all the basic biquadratic filter functions from single topology (i.e. LP, HP, BP, BR and AP)

Objectives

Results

Conclusion