Ali Ümit Keskin was born in Bursa, Turkey, in 1956. He received his B.S.E.E degree from Bogazici University in 1978, M.S.E.E. from Yildiz University (1980) and Ph.D. degree from the Institute of Science and Technology, Istanbul Technical University in (1984). In 1985, he joined Siemens AG, Turkey. He was engaged in the field of Medical Instrumentation throughout his professional career. Since September 2002, he is affiliated as an assistant professor in Faculty of Engineering, Yeditepe University, Istanbul. His main research interests are analog signal processing, transducers, spectroscopy, medical instrumentation theory and its applications.