ON THE PRE-CONSTANT SIGNALS OF THE TEAGER-KAISER OPERATOR Alfredo Restrepo Palacios, Lina Wedefort and Julian Quiroga Laboratorio de Señales, Dpt. Ing. Eléctrica y Electrónica, Universidad de los Andes AA 4976, Bogotá DC Colombia alfredo@alumni.utexas.net, lwedefort@concol.com, jul-quir@uniandes.edu.co ABSTRACT The set of root signals of a nonlinear filter is an important step for its analysis. In addition, in the case of the Teager- Kaiser operator (a discrete, nonlinear filter of the moving- window type) the characterization of
