Digital to Analog Converters (DAC)

A DAC (Digital-to-Analog Converter) is used to convert a digital signal to the analog format. An example of DAC: music stored in a DVD in digital format must be converted to an analog voltage for playing out on a speaker. Consider a DAC system having N-bit digital input and an analog output. The block diagram … Read more

What is Gray Code – Binary to Gray code conversion

Gray code is a binary numeral system where two successive value differs only in 1 bit. This code is given by Frank Gray. This is the reason why it is called as Gray code. It is an unweighted code. Gray code is also known as reflected binary code or unit distance code or minimum error … Read more

XNOR Gate – Symbol, Truth table & Circuit

A XNOR gate is a gate that gives a true (1 or HIGH) output when all of its inputs are true or when all of its inputs are false (0 or LOW). An XNOR gate is also called exclusive NOR gate or EXNOR gate. In a two-input XNOR gate, the output is high (logic 1 or … Read more

XOR Gate – Symbol, Truth table & Circuit

A XOR gate is a gate that gives a true (1 or HIGH) output when the number of true inputs is odd. An XOR gate is also called exclusive OR gate or EXOR. In a two-input XOR gate, the output is high or true when two inputs are different. In Boolean expression, the term XOR is … Read more

NOR Gate – Symbol, Truth table & Circuit

A NOR gate is a digital logic gate that implements logical NOR operation. It is a combination of an OR gate and NOT gate. If we connect the output of OR gate to the input of a NOT gate, the gate so obtained is known as NOR gate. This gate is also called as Negated OR gate. … Read more

NAND Gate – Symbol, Truth table & Circuit

A NAND gate is a combination of an AND gate and NOT gate. If we connect the output of AND gate to the input of a NOT gate, the gate so obtained is known as NAND gate. This gate is also called as Negated AND gate. In Boolean expression, the NAND gate is expressed asand is being … Read more

OR Gate – Symbol, Truth table & Realization

OR gate is a device which has two or more inputs and one output. The output of an OR gate is logical 1 (high) only if one or more inputs are logical 1 (high). In Boolean algebra, the term OR is represented by plus (+) and the Boolean expression Y = A+B indicates Y equals … Read more

AND Gate – Symbol, Truth table & Realization

AND gate is a device which has two or more inputs and one output. The output of an AND gate is logical 1 only if all the inputs are logical 1. In Boolean algebra, the term AND is represented by dot (.) and the Boolean expression Y = A.B indicates Y equals A AND B. … Read more

NOT Gate – Symbol, Truth table & Realization

The NOT gate is a device that has only one input and one output. It is a logic gate that inverts the input digital signal. That is why NOT gate is also known as Inverter. In Boolean algebra, the term NOT is represented by bar symbol (‾) and the Boolean expression indicates that Y equals … Read more

Decoders – Types & Applications

Decoder is a combinational circuit that has ‘n‘ input lines and maximum of 2n output lines. One of these outputs will be active High based on the combination of inputs present, when the decoder is enabled. It means that Decoder detect a particular code. The output of the decoder are nothing but the min terms … Read more