Dr. Northrop retired in 1997 as a professor of Electrical Engineering at the University of Connecticut. In 1963, he established one of the first biomedical engineering graduate programs in the nation, with funding from the National Institutes of Health (NIH). He also broke new ground in engineering, using live animals in his biomedical studies funded by NIH, the National Science Foundation, the U.S. Air Force Office of Scientific Research and other agencies. Dr. Northrop developed numerous biological models, and designed and simulated various controllers to regulate drug concentrations or physiological parameters, such as blood glucose in diabetics. He authored seven textbooks, including Analog Electronic Circuits, Introduction to Instrumentation and Measurements, Endogenous and Exogenous Regulation and Control of Physiological Systems, and Introduction to Dynamic Modeling of Neuro-Sensory Systems, published by CRC Press and Addison Wesley.