What is a diode? Simplest view (no physics): — a unidirectional device that allows current to flow in one direction but not the other. Ideally, we regard a diode as short circuit when voltage applied to it in the forward manner is positive. | EIE209 Basic Electronics Diode circuits Contents Diode models Typical diode circuits applications Load line concepts for nonlinear load analysis Prof. . Tse Diode circuits 1 What is a diode Simplest view no physics a unidirectional device that allows current to flow in one direction but not the other. Ideally we regard a diode as short circuit when voltage applied to it in the forward manner is positive. Prof. . Tse Diode circuits 2 Ideal characteristic Bias conditions Forward bias vd 0 current can flow and id 0. Reverse bias vd 0 current cannot flow and id 0. id id Ideal diode --------------- vd with finite forward drop more realistic ----------------- vd Prof. . Tse Diode circuits
