Diseño de un CFOA compatible con CMOS y su Aplicación en Filtros Analógicos (Design of a CMOS Compatible CFOA and its Application in Analog Filtering)

Aldo Peña-Pérez (aldopp@inaoep.mx)1, Esteban Tlelo-Cuautle1, Alejandro Díaz-Méndez1, Carlos Sánchez-López2

1Instituto Nacional de Astrofísica, Optica y Electrónica (INAOE)
2Universidad Autónoma de Tlaxcala (UAT)

This paper appears in: Revista IEEE América Latina

Publication Date: May 2007
Volume: 5,   Issue: 2 
ISSN: 1548-0992

It is presented the design of a current-feedback operational amplifier (CFOA) which is suitable for implementation with standard CMOS integratedcircuit technology of 0.35µm. The characteristics of the CFOA are derived by using biases of ±2.5V and Ibias=20µA. The usefulness of the CFOA is demonstrated by designing mixed-mode biquads which realize the low-pass, high-pass, band-pass, notch and all-pass filter functions. As a result, it is highlighted that the SPICE simulations of the biquad working in voltage-mode are in good agreement with the biquad working in current-mode.

Index Terms:
Active filters, current-feedback operational amplifier, voltage-mode, current-mode   

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