# Category Archives: Digital Electronic

## Half Adder and Half Subtractor using NAND NOR gates

Implementation of Half Adder using NAND gates : Total 5 NAND gates are required to implement half adder. Implementation of Half Adder using NOR gates : Total 5 NOR gates are required to implement half adder. Implementation of Half Subtractor using NAND gates : Total 5 NAND gates are required to implement half subtractor. Implementation… Read More »

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## Full Adder | Digital Electronics

Full Adder is the adder which adds three inputs and produces two outputs. The first two inputs are A and B and the third input is an input carry as C-IN. The output carry is designated as C-OUT and the normal output is designated as S which is SUM. A full adder logic is designed… Read More »

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## Multiplexers | Digital Electronics

It is a combinational circuit which have many data inputs and single output depending on control or select inputs.​ For N input lines, log n (base2) selection lines, or we can say that for 2n input lines, n selection lines are required. Multiplexers are also known as “Data n selector, parallel to serial convertor, many… Read More »

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## Synchronous Sequential Circuits | Digital Logic

Steps to solve a problem: 1. Draw the state diagram from the problem statement or from the given state table. Example: Serial Adder. The functioning of serial adder can be depicted by the following state diagram. X1 and X2 are inputs, A and B are states representing carry. 2. Draw the state table. If there… Read More »

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## Number System and base conversions | Digital Electronics

Electronic and Digital systems may use a variety of different number systems, (e.g. Decimal, Hexadecimal, Octal, Binary). A number N in base or radix b can be written as: (N)b = dn-1 dn-2 — — — — d1 d0 . d-1 d-2 — — — — d-m In the above, dn-1 to d0 is integer… Read More »

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## Digital Signatures and Certificates

Encryption – Process of converting electronic data into another form, called cipher text, which cannot be easily understood by anyone except the authorized parties.This assures data security. Decryption– Process of translating code to data. Message is encrypted at the sender's side using various encryption algorithms and decrypted at the receiver's end with the help of… Read More »

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