Analog implementation of median filter for real-time signal processing

Author

Li, J. S Jimmy ; Holmes, W. Harvey

Author_Institution

Sch. of Electr. Eng. & Comput. Sci., South Wales Univ., Sydney, NSW, Australia

Volume

35

Issue

8

fYear

1988

fDate

8/1/1988 12:00:00 AM

Firstpage

1032

Lastpage

1033

Abstract

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

Keywords

active filters; delay lines; real-time systems; signal processing equipment; switched capacitor filters; 10 MHz; MOS switched-capacitor circuits; active filters; analog comparators; analog tapped delay lines; analogue circuit; general order-statistics filter; median filter; nonlinear filtering; real-time signal processing; Clocks; Complexity theory; Delay lines; Digital filters; Digital signal processing; Fabrication; Filtering; Signal design; Signal processing; Switched capacitor circuits;

fLanguage

English

Journal_Title

Circuits and Systems, IEEE Transactions on

Publisher

ieee

ISSN

0098-4094

Type

jour

DOI

10.1109/31.1852

Filename

1852