Elektronik-1 (v2) #012 Diyot Modelleri ve Eşdeğer Devreler (Sedat Hoca)

Join this channel to take advantage of these privileges:    / @engineeringtr   In this video tutorial, we will examine different modeling approaches for diodes, one of the fundamental building blocks of electronic circuits. We will specifically focus on the "Piecewise-Linear" equivalent circuit model. This model better represents the realistic properties of diodes encountered in practical applications, rather than their ideal behavior. The first part of the video will explain the fundamentals of this model using a diode's current-voltage (I-V) graph. As can be seen in the graph, current flow is negligible in the conduction region of the diode until a certain threshold voltage (approximately 0.7V) is exceeded. After this threshold voltage is exceeded, the current increases rapidly. To model this behavior, a 0.7V voltage source (threshold voltage VK) is used, followed by a structure represented by a specific resistance (r_on) in the circuit. This approach allows us to simplifiedly represent the diode's forward conduction and the small voltage drop during this conduction. Furthermore, the diode's reverse conduction (very low current) is also taken into account in the model. Secondly, we will move on to a further simplified model, the 'Simplified Equivalent' circuit. In this model, the diode's internal resistance (r_on) in forward conduction is assumed to be zero, and only the threshold voltage (0.7V) is considered. This simplified model is particularly useful for making quick predictions or understanding basic principles during circuit analysis. The video explains in detail how these two different models represent the I-V characteristics of the diode, which model is preferred in which situations, and the role of these models in practical circuit analysis. This video is of great importance for students studying electronic engineering, computer engineering and related fields to understand diodes.