![]() ![]() ![]() MOSFET stands for Metal Oxide Semiconductor Field Effect Transistor. Now, let’s move on to the second candidate - MOSFET This means, under normal operating conditions, a BJT can handle tens of amps while withstanding up to one thousand volts and more. BJTs are high-voltage, low-current devices. Remember the sentence, “ They are a preferred option for low-current applications”? Highlight the term, low-current. On the other hand, to work as a closed switch, a BJT works in saturation mode, there are a high collector current and zero collector voltage, meaning ideally there is zero power consumed by the BJT. To work as an open switch, a BJT operates in cut-off mode, here there is zero collector current, meaning ideally zero power is consumed by the BJT. You might ask, “ How does it do this? Is it from outer space? “Well, the answer is simple. We call the BJT a switching device because it does not consume a lot of power to provide regulation. They are a preferred option for low-current applications like switching a low-current relay, LEDs, and amplifiers. ![]() Well, BJTs are not easily damaged by static electricity, they are cheaper and easier to bias than MOSFETs. Depending on the biasing of these two junctions, the BJT can operate in different modes.īJT, why should you be named the better transistor? Every BJT has two P-N junctions called the Emitter-Base junction (EB) and the Collector-Base Junction (CB). The slightly doped Base Region and the Collector Region which is moderately doped. It has the Emitter Region, which is highly doped. BJT is divided into three regions based on doping. They are regions, junctions, and modes of operation. In terms of the architecture of BJT, three big terms come to play. Like any transistor, BJT can amplify a signal or switch a high power load using a very small signal. The bipolar in the name signifies the fact that both holes and e lectrons are used in this transistor for current conduction. Let’s welcome our first candidate – The BJTīipolar Junction Transistor (BJT) was invented in 1948 at Bell Telephone Laboratories. We also made a tutorial on Vacuum Tubes, you can also check that out if you want to learn more about it. You can check those about if you are interested in making cool projects with them. Previously, we have built many projects that require BJTs, Transistors, or MOSFETs to work properly. Transistors are the new employees, and well, so far so good! The burning question then is, between BJT and MOSFET, who should win the employee of the year award? They require a high operating voltage (they eat a lot!) so unfortunately for them, society rendered them inefficient employees and they got fired. And when I say vacuum tubes, the first thing that comes to the mind is a big bulky device, inside which the vacuum tubes reside. Before semiconductors (particularly transistors), the only devices available for signal amplification and switching were Vacuum Tubes. In this article, we will discuss the basics of BJTs, Transistors, and MOSFETs. If you are exploring the world of electronics, and you want to know more about the Transistors and MOSFETs for your upcoming brilliant project, you are at the right place. ![]()
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