The equations output can be easily explained using the AND Gate Boolean Equation, which is Q = A x B or Q = AB. Hence, for an AND Gate the output is HIGH only when both the inputs are HIGH. TransistorĪ transistor is a semiconductor device with three terminals that can be connected to an external circuit. 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. The circuit symbol for each of them can be seen below. This article will explain to you, how to build AND Gate circuit using transistor.
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