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Analog implementation of median filter for real-time signal processing

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2 Author(s)
Li, J.S.J. ; Sch. of Electr. Eng. & Comput. Sci., South Wales Univ., Sydney, NSW, Australia ; Holmes, W.H.

A novel median filter using analog tapped delay lines is designed for real-time signal processing. It requires only N+1 analog comparators for a window size of size N. As an extension, a general order-statistics filter can also be realized with moderate increase of circuit complexity. For current available fabrication technology for MOS switched-capacitor circuits, the filter can work at a clock rate up to 10 MHz. This development opens up possibilities for practical applications of nonlinear filtering in real-time signal processing, since the analog circuitry is far less complex than the corresponding digital circuitry

Published in:

Circuits and Systems, IEEE Transactions on  (Volume:35 ,  Issue: 8 )

Date of Publication:

Aug 1988

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