Efficient circuit implementation of Morlet wavelets

 

M. Meléndez-Rodríguez¹, J. Silva-Martínez² & R. Spencer²

 

¹ Texas Instruments, Inc. Dallas, TX 75243 USA. E-mail: m-melendez@ti.com

² Texas A & M University Electrical Engineering Department College Station, Texas.

 

Received: June 19^th 2004.
Accepted: March 3^th 2005.

 

Abstract

A family of versatile building blocks intended for the implementation of Morlet wavelets is proposed. The circuits are compact, fully programmable, and well suited for low-voltage and low-power applications. The resulting wavelet is temperature compensated and low sensitive to process parameter variations. Using current sources can independently control the main wavelet parameters. Hspice and breadboard results demonstrate the feasibility of both the wavelet realization and proposed circuits.

Keywords: Wavelet Circuit Implementation, Translinear Circuits, Non-linear circuits, Analog Integrated Circuits.

 

Resumen

Se presentan varios circuitos para la realización de ondoletas tipo Morlet "Morlet wavelets". Los bloques básicos son compactos, programables, y pueden ser utilizados en aplicaciones donde se requiera bajo voltaje de alimentación y bajo consumo de potencia. La arquitectura propuesta está compensada en temperatura y es poco sensible a la variación de los parámetros del proceso de fabricación. Las principales características de los circuitos son controladas por medio de fuentes de corriente. Resultados de simulación y experimentales de la ondoleta y los bloques básicos, muestran la funcionalidad y versatilidad de los circuitos propuestos.

 

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