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The device structure of the N-Channel JFET is depicted in Figure 1. Figure 1 As illustrated in Figure 1, the structure of the n-channel JFET comprises an n-type substrate diffused with p-type material on both sides. The n-region, termed the channel, forms a pathway between the Source and Drain. The two p-regions are electrically interconnected, and the shared terminal is referred to as the Gate. Note 1: For a p-channel JFET, reverse all semiconductor types, i.e., replace n-channel with p-channel and replace p-type diffusions with n-type diffusions. Similarly, reverse bias voltages. Note 2: The JFET is a symmetrical device, meaning the Source and Drain terminals are interchangeable. However, designating one terminal as Source and the other as Drain is practical. Why the name JFET? The fundamental operation of the device relies on the biasing of the pn junction. In this case, the junction is reverse biased, controlling the channel width and thus the current flow between Drain and ...