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Exclusive NOR or XNOR gate

In the exclusive OR or XOR gate section we have seen how XOR gate works and how simple it is. Exclusive NOR or XNOR gate is also like a XOR gate, the only difference is we put a NOT logic in the output of a XOR gate and XOR gate becomes a XNOR gate. That… Read the rest

Digital circuit and logic gate

Digital Circuit Those electronic circuits which work on digital data or signal are called digital circuits. Inputs and outputs of these circuits have only two possible states; that is high or low (voltage or current). These high and low states represent 1’s and 0’s which are binary digits, from where the name digital came from.… Read the rest

Truth table

Truth table is a mathematical table used to describe all possible logic states or logic levels of logic circuit inputs and corresponding output. It may be single input logic circuit, two inputs, three inputs and even more. This is a truth table for NOT operation. It has only one input and only two input states… Read the rest

Boolean algebra

Boolean algebra is named after English mathematician George Boole who introduced this different type of algebra in his first book The Mathematical Analysis of Logic. It was the driving force in development of digital electronics. All modern programming languages use this algebra. It has application in other branches of mathematics also. In ordinary algebra variables… Read the rest

Digital Electronics

Electronics changed the world and digital electronics has changed electronics. This digital electronics is different from analogue electronics. Before starting discussion on digital electronics I think it’s better to have some discussion on analogue and digital concept. Time is changing continuously and your analogue watch dial changes continuously. Your car speedometer with needle, mercury thermometer,… Read the rest