Parity generator and checker explained in detail

Before moving on the parity generator, first get some interesting information about parity bit.

The first question that came in your mind is that what is parity bit…?

Parity bit might be 0 or 1 in data transmissions. Parity bit producing method is one of the most popular error detection ways generally used during data transmission.

Undoubtedly, parity bit becomes a very useful tool in this modern era where digital data transmission takes place at every instance of human’s life. While data transmission, loss of data bit information is very common due to several factors such as loss of signal strength (low signal frequency), external noise etc.

This kind of loss is known as error and it can be detect by parity bit generating method.

In order to find error during digital data transmission, sender can add extra bit inside the message and this extra bit is known as parity bit. After adding extra bit sender will send the message.

On the other side, receiver will receive the message. Then, receiver will count the 1s found in the message and matched with the number of 1s transmitted by the sender.

If number of 1s (at receiver’s end) is not equal with the number of 1s (at the time of transmission) then there will be an error in the transmitted digital data.

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Parity Generator and checker

In present scenario, there are several kind of circuits as well as devices made by combining parity generator and checker which were further used in end number of digital systems for detecting single bit errors during data transmission. By adding parity bits with original data bits, the sum would be odd or even.

What is parity generator ?

The addition of extra bit during data transmission by the sender is known as parity generator. In even parity bit generation method, the parity bit will be ‘0’ and number of 1s is also even.

On the other hand, if there were odd number of 1s during data transmission then parity bit or extra bit will be ‘1’. Once and for all, even and odd parity bit generation process will take place on the basis of number of 1s transmitted.

Even Parity Generator Logic Circuit

Even Parity Generator Logic Circuit


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How parity generator works ?

Parity check works at the other side of digital data transmission which is also known as receiver’s end. Generally, parity checker will be a logic circuit which will be designed to find out possible errors during digital data transmission. Like parity generator, parity check also can be even or odd and this even or odd is depending on the kind of extra bit generated at the sender’s end.

Even Parity Checker Logic Circuit

Even Parity Checker Logic Circuit

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Parity checker and parity generator ICs

In present time, there are end number of parity checker/generator ICs (integrate circuits) are available in the market which comes in different input configurations like 12-bit, 9-bit, 4-bit, 5-bit and so on. 74180 is one of the most commonly used as well as standard type of parity checker/generator ICs. 74180 is a 9-bit parity checker/generator IC. It is generally used for error detection in data retrieval systems and in high speed data transmission. This IC contains 8 parity inputs and 2 outputs i.e. even sum or odd sum.


This article has 98 comments

  1. Sagar Mathur Reply

    Please how can i develop VHDL code for the 8 bit even parity check ? Very very urgent

  2. Jessica Nitta Reply

    i made 4 bit parity generator circuit. IS there any way i can add up more bits on it, or double it more precisely.

  3. Abel Kooter Reply

    what does the ‘use’ statement does when i do program for the parity generator or parity check ?

  4. Ankit Dubey Reply

    please provide some nice project on digital circuits for parity generator and parity check

  5. Camiel Deroos Reply

    is there the simple way to calculate the even parity bits for the the big number as such as 32 bit or 16 bit ?

  6. Isabel Groot Reply

    is the using XOR gate only the way to perform parity generator ?

  7. Ash Katele Reply

    What will happen if i change the parity bits changes to medium in parity generator and the parity checker ?

  8. Florencia Medina Reply

    Can change the parity of time if i change the parity operator?

  9. Rafael Pacheco Reply

    What is the importance of Xor Gate in parity generator and parity checker ?

  10. Ellem Crys Reply

    is there the truth tables of even parity checker and even parity generator ?

  11. Mason Lett Reply

    is it true that XOR gate is the only gate used in parity generation and detection circuit.

  12. Som Bhattachar Reply

    How can a parity checker be made using universal gates? What is its operation?

  13. Kao Zi Chong Reply

    If i add a single parity bit to a four-bit word, how many output lines will it be needed after multiplexing?

  14. Satu Chowdhury Reply

    What are the applications of parity generator made up of Xor Gate in real life ?

  15. Hilda Reply

    I’m in a bit of confusion, that the truth tables of even parity checker and even parity generator are the same or would there be any difference ?

  16. Eine Stolze Reply

    If a parity bit is added to a 6 bit word, how many output lines do i need after multiplexing?

  17. Insha Khalid Reply

    Please suggest some nice topics for the project i can make with parity generator circuit.

  18. Jon Fritda Reply

    In parity generator and check, what will happen if i set the the parity bit to the medium ?

  19. Amelia Reply

    Please suggest a way to determine LDPC generator matrix form parity check matrix.

  20. Joaoviieira Reply

    i do not understand how to get a feedback from the generator, please explain

  21. Apsa Reply

    what are the general applications of parity generator applications in real world ?

  22. mohan paal Reply

    i make a 3 bit even parity generator but truth table is wrong values. plese help

  23. niyaz Reply

    how to take a feedback from parity check as an input to another parity check

  24. Rananjay Kar Reply

    i want to make a mini project for 2 bit parity generator, please help me

  25. Linda Reply

    please i seek for the C# or hexadecimal codes for parity generator, any bit will work.

  26. Issac Reply

    please 3 bit odd parity generator state diagram and truth table, i will be very thankful

  27. Ashish Reply

    does exor used in even parity generator and exnor used in odd parity generator or does it vice versa ? its a bit confusing.

  28. Tanmay Agrawal Reply

    what are the general basic difference between parity checker and parity generator

  29. Saundarya Venkateshwar Reply

    which logic gate should i use if i need to make an odd parity generator

  30. Harsh Vardhan Reply

    please do provide or link to a source where i can find truth table for an 8 bit parity generator, thank you

  31. Rickie Reply

    can you tell us that where can we find the application of parity generator and parity check in real world ? i’ll help better understanding the their application

  32. Jeff Anderson Reply

    please explain odd parity checker and its logic diagram, i’ll be a lot helpful

  33. Mariah Halsy Reply

    i was working on parity generator verilog code, i found a problem while using nand gate at the output feedback terminal, it’s supposed to compliment/not the signal, but it seems not to be working.

  34. Mark Sandy Reply

    I was about to design a generator, i need your suggestion regarding power balance input and out.

  35. Rich Coffman Reply

    i’m still not clear with detecting errors with the parity generator :!

  36. Sam Reply

    how the Parity checkers and generators helps in detecting errors in binary data streams ?

  37. Chris Reply

    can i design a 6 or 9 bit parity generator using ic 74180 ? If yes please tell me how ?

  38. Mclausky Reply

    what is the difference between parity checker and parity generator ? the general difference i’m asking anyone ??

  39. Adams Reply

    i have a virtual parity check, i want to redesign it to add up some more bit, how can i do so ?

  40. Gabriella Reply

    Need a little guidance to increase the bit number of my current parity generating system.

  41. Ryan Laker Reply

    Need more further details about how to design a generator with a feedback. Rest is just fine

  42. Gurmeet Reply

    Please also provide the guide to prepare my own circuit for parity generator and parity check.

  43. Kevin Reply

    I Want to design a circuit that takes a serial data stream from data in input. I want to get the high output if the data in the previous clocks have en even number of 1.

  44. Saiesh Reply

    I need to design 3 bit parity generator which has 3 input data A, B and C also 2 even/off parity outputs. Need some help.

  45. Amparo Reply

    hi friends,
    I am looking for a VHDL code of Parity checker/decoder please guide me through.
    Thank you

  46. Swarna Tripathi Reply

    Is exnor or exor or both In the odd parity generator. It is confusing with sentence and figure

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