Electronically Tunable Voltage-Mode Biquad Filter/Oscillator Based On CCCCTAs

Powerful Essays
(IJCSIS) International Journal of Computer Science and Information Security,
Vol. XXX, No. XXX, 2010

Electronically Tunable Voltage-Mode Biquad
Filter/Oscillator Based On CCCCTAs
Sajai Vir Singh
Department of Electronics and Communication Engineering,
Jaypee Institute of Information Technology, Sect-128, Noida-201304, India sajaivir75@gmail.com Rahul Chhabra
Department of Electronics and Communication Engineering,
Jaypee Institute of Information Technology, Sect-128, Noida-201304, India rahul.december90@gmail.com Kanika Nagpal
Department of Electronics and Communication Engineering,
Jaypee Institute of Information Technology, Sect-128, Noida-201304, India kanika.nagpal21@gmal.com Devansh
Department of Electronics and Communication Engineering,
Jaypee Institute of Information Technology, Sect-128, Noida-201304, India kumar_devansh@yahoo.co.in Abstract— In this paper, a circuit employing current controlled current conveyor trans-conductance amplifiers (CCCCTAs) as active element is proposed which can function both as biquad filter and oscillator. It uses two CCCCTAs and two grounded capacitors.
As a biquad filter it can realizes all the standard filtering functions
(low pass, band pass, high pass, band reject and all pass) in voltagemode and provides the feature of electronically and orthogonal control of pole frequency and quality factor through biasing current(s) of CCCCTAs. The proposed circuit can also be worked as oscillator without changing the circuit topology. Without any resistors and using grounded capacitors, the proposed circuit is suitable for IC fabrication. The validity of proposed filter is verified through PSPICE simulations.
Keywords-component; CCCCTA, Tunable, Universal, Voltagemode

I.

INTRODUCTION

In analogue signal processing applications such as communication system, instrumentation and control engineering, oscillators and filters are frequently used as two analog building blocks. An oscillator

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