![]() ![]() So it's just convenient to call the common voltage as 0 and hence we ground it. Remember what we really care about is the voltage difference. ![]() But we could also say it's positive terminal is at +5V and the negative terminal is at -5V. For example, if we have a 10 V cell, then we could say, it's positive terminal is at 10V and the negative terminal is at 0. These connections are beyond the scope of our course syllabus and so we will not be discussing them.įinally, all voltage levels are relative. If we ground collector or base, we will call it common collector circuit and * common base circuit* respectively. In this entire course, we will only be dealing with common emitter circuit and so the emitter will always be grounded. Based on the sequence of doped regions in a transistor, there are two types: and npn pnp n-region p-region Anode cathode Forward-biased reverse-biased 2. When you ground emitter, the circuit is called common emitter connection (Simply because in a real circuit, the ground would be negative terminal of a battery, and so the emitter would be a common connection for both base and collector). ![]() The answer is, you can ground any of the three parts. From the author: That's a very good question. ![]()
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