Affiliation: | (1) Department of Electrical Engineering and Computer Science, The George Washington University, 20052 Washington, D.C., USA;(2) Microsystems Laboratory, Electrical Engineering Department, University of Maryland, 20742 College Park, Maryland, USA;(3) Departamento de Electronica, Facultad de Informatica, Universidad Politecnica de Madrid, Ctra. de Valencia, Km. 7,00, 28031 Madrid, Spain |