Novel Wien Bridge Oscillator Design Using Functional Block Structure with Current Conveyors

Pavel Brandstetter,Lukas Klein

doi:10.15598/aeee.v10i1.556

Abstract

The purpose of this paper is to generally present possibilities of the current conveyor use in the well-known active electronic circuits. Current conveyors are able to substitute all known active elements. This claim is supported by the fact, that four basic functional block structures can be realized by use of current conveyors - voltage-controlled voltage source, voltage-controlled current source, current-controlled current source and current-controlled voltage source. The paper presents particular example of use of functional block structure with current conveyors in Wien bridge oscillator, where it successfully substitutes operational amplifier on the place of active element. Both theoretical formulae and design description are given. Finally, OrCAD PSpice simulation results are presented.

Highlights

Current conveyor is already well-known active element
The current conveyors can be considered as universal elements. This claim stems from the fact, that four basic active functional block structures can be implemented by using current conveyors, as described in [4]
These four basic functional block structures theoretically allow substituting the basic types of active elements in electronic circuits

Summary

Introduction

Current conveyor is already well-known active element. The first generation current conveyor (CCI) was introduced in 1968 [1]. The electronic industry did not require wider expansion of more current conveyor variations and their wider application in commercially produced electronic circuits and devices. Second generation current conveyor (CCII) has received the greatest attention of the three existing current conveyor generations ever [2], noninverting positive second generation current conveyor (CCII+). It remains the only available current conveyor variation, not counting the universal current conveyor (UCC) [3]. The number of advantages of this active element dominates over disadvantages.

Principle and Variations of Current Conveyors

Functional Block Structures with Current Conveyors

Proposed Wien Bridge Oscillator Using Current Conveyors

Conclusion