ELECTRICA

NEW FIRST-ORDER ALLPASS FILTERS EMPLOYING SINGLE MODIFIED THIRD GENERATION CURRENT CONVEYOR

1.

The Scientific and Technical Research Council of Turkey, Marmara Research Center, Information Technologies Research Institute, 41470, Gebze, Kocaeli, TURKEY

2.

Department of Electronics and Communication Engineering, İstanbul Technical University, İstanbul, Turkey

3.

Bogazici University, Faculty of Engineering, Department of Electrical and Electronics Eng., 80815 Bebek-Istanbul, TURKEY

ELECTRICA 2004; 4: 1141-1147
Read: 160 Downloads: 127 Published: 28 December 2011

The third generation current conveyor (CCIII) presented by Fabre is shown to be a useful active element to pick up the current of a floating passive element. CCIII can be considered as a current controlled current source with unity gain. The use of controlled sources with unity gain in the design of active-RC filters leads to structures with tight design equations. In order to relieve these, it may be useful to insert a gain larger than unity. The modified third generation current conveyor (MCCIII) is a newly introduced active building block to realize this property and to provide new possibilities in the circuit synthesis. In this paper, four new first-order allpass filter configurations employing a single modified third-generation current conveyor (MCCIII) are presented. To demonstrate the advantages of the proposed circuit topologies, a quadrature oscillator is designed employing the proposed allpass sections. SPICE simulation results verifying theoretical analyses are also included.

Files
EISSN 2619-9831