![]() The logic of an AND gate is explained above already and to build an AND gate using a transistor we will follow the same truth table shown above. ![]() This article will explain to you, how to build AND Gate circuit using transistor. The circuit symbol for each of them can be seen below. ![]() The device can be used as a switch and also as an amplifier to change the values or control the passing of an electrical signal.įor building an AND logic gate using a transistor we would be using BJT transistors which can be further classified into two types: PNP and NPN – Bipolar Junction Transistors. Hence, for an AND Gate the output is HIGH only when both the inputs are HIGH.Ī transistor is a semiconductor device with three terminals that can be connected to an external circuit. The equations output can be easily explained using the AND Gate Boolean Equation, which is Q = A x B or Q = AB. The relation between input and output values can be explained using the AND Gate Truth Table shown below. AND Logic GateĪND logic gate is a D-shaped logic gate with two inputs and one single output, where the D shape in between the input and output is the logic circuit. But the focus of this article will be on the AND Gate because later we would be building an AND Gate using a BJT transistor circuit. There are many different types of logic gates and each of them has a different logic which be used for different purposes. They state the relation between every input and output of a system using an Arthmetic logic. From the basic Flip-Flops to Microcontrollers Logic gates form the underlying principle on how bits are stored and processed. Logic Gates are the basics of a many digital electronic circuit. Similarly a Flip-Flop can be built by using a combination of Logic Gates and the Logic Gates itself can be built by using a few Transistors. Like an Operational Amplifier or 555 Timer IC is built by combination of many Transistors, Flip-Flops, Logic Gates and other combinational digital circuits. As many of us know an Integrated Circuit or IC is a combination of many small circuits in a small package which together performs a comman task. ![]()
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