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Low frequency, current mode programmable KHN filters using large-valued active resistors

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4 Author(s)
Carlos Muniz-Montero ; Dpto. de Electrónica., Instituto Nacional de Astrofísica Optica y Electrónica, Puebla, MEXICO. cmuniz@inaoep.mx ; Ramon Gonzalez-Carvajal ; Alejandro Diaz-Sanchez ; J. Miguel Rocha

The present work proposes a new current-mode, programmable Kerwin Huelsman Newcomb (KHN) filter suitable for very low frequency processing. The proposed implementation, developed with only six current mirrors and two large-valued, programmable active resistors, solves some of the more challenging problems of low frequency filtering. HSPICE simulation results using BSIM3.3 models for a 0.5-mum CMOS technology, are shown. Center frequencies in the range of 12.4 Hz-33 Hz, total harmonic distortion less than 1 %, and static power consumption of 1.05 mW, were observed.

Published in:

2007 IEEE International Symposium on Circuits and Systems

Date of Conference:

27-30 May 2007