Logic Gates: Fundamentals of Digital Design and IC Techniques

his lecture, presented by Dr. G.S. Virdi (Ex. Chief Scientist, CSIR-Central Electronics Engineering Research Institute) , introduces the fundamental concept of Logic Gates for engineering students. Logic gates are electronic circuits crucial to digital design and fabrication using IC (Integrated Circuit) techniques. The lecture defines logic gates as circuits that operate on one or more input signals to produce an output signal, which is a simple Boolean operation of its input.



The presentation provides an overview of the seven major types of logic gates, establishing the groundwork necessary for digital system understanding:


Basic Gates: AND, OR, and NOT (Inverters).


Universal Gates: NAND and NOR.


Special Purpose Gates: Exclusive OR (XOR/Ex-OR) and Exclusive NOR (XNOR/Ex-NOR).

The focus is on the core function and output condition for each gate type, along with their characteristic symbols and Boolean expressions, without dwelling on the detailed internal circuit configurations.

1. LOGIC GATES 15-10-2025 1 Dr.G.S.Virdi Ex.Chief Scientist CSIR- Central Electronics Engineering Research Institute Pilani - - 333031, India

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