Boolean Theorems

Boolean theorems and laws are used to simplify the various logical expressions. In a digital designing problem, a unique logical expression is evolved from the truth table. If this logical expression is simplified the designing becomes easier. The boolean algebra is mainly used in digital electronics, set theory and digital electronics. It is also used …

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JK Flip Flop

The JK Flip Flop is the most widely used flip flop. It is considered to be a universal flip-flop circuit. The sequential operation of the JK Flip Flop is the same as for the RS flip-flop with the same SET and RESET input. The difference is that the JK Flip Flop does not the invalid …

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NAND Gate

The NAND gate is a combination of an AND gate and NOT gate. They are connected in cascade form. It is also called Negated And gate. The NAND gate provides the false or low output only when their outputs is high or true. The NAND gate is essential because different types of a boolean function …

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NOR Gate

An OR gate followed by a NOT gate in a cascade is called a NOR gate. In other words, the gate which provides a high output signal only when there are low signals on the inputs such type of gate is known as NOR gate. The logic symbol of the gate is shown below: The …

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NOT Gate

The NOT gate is a single input single output gate. This gate is also known as Inverter because it performs the inversion of the applied binary signal, i.e., it converts 0 into 1 or 1 into 0. In other words, the gate which has a high input signal only when their input signal is low …

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AND Gate

AND gate also has two or more input signals same as that of the OR gate, and the output is single. The gate has a high output only when all the input signals are high otherwise the output signal is low. The logic symbol for the gate is shown below. The switching circuit of the …

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OR Gate

An OR gate has two or more than two inputs and one output signal. It is called an OR gate because the output signal will be high only if any or all input signals are high. The OR gate follows the logical operation of the input and output signals. It permits the signal to pass …

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Four Quadrant Operation of DC Motor

Four Quadrant Operation of any drives or DC Motor means that the machine operates in four quadrants. They are Forward Braking, Forward motoring, Reverse motoring and Reverse braking. A motor operates in two modes – Motoring and Braking. A motor drive capable of operating in both directions of rotation and of producing both motoring and …

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