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Superficies y vacío
Print version ISSN 1665-3521
Superf. vacío vol.22 n.4 Ciudad de México Dec. 2009
Weakinversion topologies of analog median filters
Alejandro DíazSánchez1, José Miguel Rocha Pérez1, Javier LemusLópez1, Jaime RamírezAngulo2*, Germán Ardul MuñozHernández3, Carlos Arturo GraciosMarín3
1 INAOE, Luis E. Erro #1. Tonantzintla, Puebla, México. Email: adiasan@inaoep.mx,
2 Klipsch School of Electrical and Computer Engineering, New Mexico State University, Las Cruces, New Mexico, USA. Email:: *jramirez@nmsu.edu
3 Instituto Tecnológico de Puebla Av. Tecnológico 424, Puebla, Puebla, México. Email: gmunoz64@hotmail.com
Recibido: 10 de julio de 2009.
Aceptado: 20 de octubre de 2009.
Abstract
Design and implementation of two analog median filter cells are described. The first topology is a differential pairs array, which drain currents are driven into two nodes in a differential fashion. The second topology is based on a wide range OTA, which is used as basic block to maximize the dynamic range. Fabrication parameters for a MOSIS process of 1.6 μm are used. Experimental results of two threeinput fabricated prototypes are shown.
Keywords: Nonlinear Filters; Median Filters; WeakInversion.
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