Priority Encoder

[@KCIsMe]

At around 9:05 in the Video, you replace some of the zeroes with "don't cares". I was wondering why these weren't ones since I3 has priority over I2.

[@narayandhakal6581]

i had the same question here i got the ans

[@chandanpandey1072]

But don't care is the only way which satisfy both the condition of truth table that's why we have to use don't care...

[@sufyanparkar9790]

Chandan Pandey Bhai i3 ka awkaat zyada Hai... uski chalegi aise samaj

[@sufyanparkar9790]

best comment (edits) neso academy please pin this...

[@Official-tk3nc]

Hey bro how are you ? I thought we will be missed. THank god you i could find u. Where are you now

[@ahasnainkhan9622]

In the last K map, You can't put 0 (initially) on the third row because notice the truth table, it is having I2 as 1 while I3 is 0. Those "don't cares" are not "don't cares" but they are simply 1.

[@bakashisenseiAnimeIsLove]

exactly

[@K_DASHX]

It’s fine bro,everyone makes mistakes,uk ths teacher was my last hope for my digital exams

[@K_DASHX]

He’s really good at teaching

[@suyashagrawal9834]

Yah you're correct actually

[@PandeyAnjalii]

exactly, I have also same question for last k map it is clear that I3 and I0 are 0 and 1 so only second will be 0 not third.

[@yingzhenglee4204]

Thank you for this video sir. However, I think there are a couple of errors made in this video, one of which many others have already pointed out. 1) @ 5:49, only the 2nd row (0 1 X X) should have 1s, not including the 3rd row (1 1 X X), because the 3rd row does not correspond to the table value and function Y1(0, 1, X, X) = 1. However, the answer still works out in the end because the table values Y1(1, X, X, X) = 1 would have covered the last 2 rows ( 1 1 X X and 1 0 X X) with 1s. 2) @ 8:06, once again, only the second row should have been covered with 0s. The third row (1 1 X X) should not have been covered with 0s because it does not correspond to table values Y0( 0, 1, X, X) = 0. Therefore, Y1(1, X, X, X) will be able to nicely cover the last 2 rows (1 X X X) with 1s; there wasn't any contradiction (mentioned at 8:44) to begin with, I guess you accidentally covered the 3rd row with 0s to make you think that. 3) @ 10:17, it should be Y0 = I3 + I1 I2' instead of Y0 = Y3 + I1 I2'. Minor error, pretty sure many understood it as the former. Nonetheless, great work at making this series, haha you must be pretty tired while making this video. I can't imagine myself multitasking like this, explaining while working out the calculations simultaneously; I would definitely have made a plethora of errors!

[@ujjwal2473]

your patience and grit while writing this is appreciable. I couldn't care to write so much

[@smartnoobgamer8292]

Most loved comment 😘❤

[@circuitsanalytica4348]

Yes friend, there are some mistakes, but is human to make errors.....

[@kuthuhalaya9794]

Nice explanation with details ❤️

[@microwavecoffee]

thanks, was going mad

[@satyamarrivada6811]

The hardest step in it is the solving of k map u explained it in short and not clear....I watched this only for k map solvation and I got it after I watched the video for 10th time

[@kandy1249]

@8:40 The mistake you did in y0 kmap is.. the 3rd row is not don't care. It was 1 in all the columns of 3rd row in y0 (2nd ) k map. It's because.. our fourth entry in truth table says.. i3 = 0 and i2=1 and don't care for i1 = x and i0 = x Which means it specifies entries only for 2nd row. While last entry in truth table specifies values for last 2 rows of y0 (2nd)kmap. Read it carefully.. you will understand. (For students) great video. Thanks for helping me understand it.

[@animeshgautam6197]

are u sure bro because i also had the same confusion please reply

[@ngkean9743]

@@animeshgautam6197 100 percent

[@SruthiMarkkassery]

Yep

[@alokbharti3608]

Yepp .. right.. there is mistake

[@ughadevaibhav7]

You are right Kandarp!

[@ad_cool4435]

Neso academy if it wasn't for u guys I would have failed in digital electronics .Thank you guys😚👏

[@yasamindev]

for the second k-map (for y0), the third row must be all 1s, not DON'T CAREs. also, the boolean function is Y0= I3 + I1.I2'.

[@fun-world6243]

As i3 is mentioned 0 Hence yasamin is correct

[@circuitsanalytica4348]

Yes bro, you are right....

[@SayeedMahfuz007]

same here

[@soumodipsasmal7628]

In the last k' map, Y0 will be I3 + I1*I2 complement

[@yaswanthkosuru]

U have a bright future 😂🤣

[@cyclotron1295]

I3+Ī2I1

[@bavarvaneel5]

My exam is tomorrow and I'm binge watching it today, very helpful bro!!!!!!!!!!!!!!!!

[@circuitsanalytica4348]

Yes really nice videos....

[@lovisharora6464]

When we considered I2 =1 and I3 =0 why are we filling 2nd and 3rd row , It should be only 2nd row?

[@maishaddad5777]

i thought the same

[@uzmau5017]

You r right Lovish Arora

[@cedricfossito972]

That's true. only the 2nd row should have been filled when I2 = 1. It ended up working because I3 cover the 3th and 4th row.

[@simplesolutionshub]

Because when I3 became 1 and rest(I2, I1, I0) are don't care. Then the third and fourth row in K-map having I3 as 1 and not caring for the value of I2 we just put 1 in third and fourth row.

[@cinvest2411]

if we will fill only 2nd row then I3' will also come. That's why?

[@shadabsiddiqui28]

please never stop to teach as you explain so easily

[@Big_dreamer-t8f]

Neso academy is the best KZbin channel in the world.I glad that is an Indian guy.Teaching style is awesome.Thank you very much for providing depth knowledge in electronics.

[@circuitsanalytica4348]

Yes, Jeet you are right....

[@CornPaper]

@@circuitsanalytica4348 the video is wrong though

[@vnnmichael]

Only if these lectures were available in the past when i was doing Engineering :( these are so useful for my interview preparation !!!!!!!!!!!

[@UpendraBadisa-kl3jn]

where are you now..??

[@ghostriley22]

In case of Y0, the 3rd row of K-Map should be all 1 and not X(don't care) due to the higher priorty of i3. So there is no contradiction at all

[@siddharthsingh6393]

True

[@pawanphalak5072]

great to see you are reviewing your videos before posting, appreciate your effort in pointing those mistakes.

[@ECOMMUSK]

This is good because you're the first Indian guy whose accent I can CLEARLY understand LOL. Good job.

[@iemnhanthethao6628]

uk........dễ hiểu thật

[@keshav_c17]

+luc1f3rs :D damn... i shouldn't laugh at your pun but i cant control myself :D :D

[@waqeebsayeed3294]

damn. chill mate!! he said what many foreigners face. you didnt have to act like a loser in there

[@paritoshpandey5103]

Hearing issue I guess😉😉😉

[@cheewaidavidwong7256]

@Swarnava Bannerjee haha you rrr funny from indian accent.

[@sammuqsith2118]

Holy shit bro! They did ask us this question for exam.

[@kshitijkhare5979]

at 10:25, Yo = i3* at the place of Y3

[@nivesudha3112]

I really amazing to see this channel because u do this lecture before 5 year but it is very clear we easily understood everything.......... 👏keep doing ur are a grate teacher 🙂

[@shreyanjitgupta7159]

when we are considering [I3=0 I2=1 I1=x I0=x] It should only e the second row and for [3=1 I2=x I1=x I0=x] it will be last 2 rows. So Kmap of Y1 is correct in the end but in Kmap of Y0 the 3rd row and 4th row will be all 1s.

[@davebacknolaliki1452]

The intro music is a straight vibe. Thanks for the video.

[@avirupdey7565]

Everything becomes so easy when you explain it. I can just breeze through morris mano after seeing your videos. NESO= Khan Academy, India

[@circuitsanalytica4348]

Yes dear friend, you are right.....

[@damonhart8595]

I guess he started to get dizzy at the end, me and you buddy LOL !

[@only1kleigh]

Thank you for posting this video and explaining all of this very clearly. I was having a hard time trying to understand what my book was putting across. Now this is all very clear to me. Thanks again.

[@lahirusranasinghe7079]

yo = I3 + I1.I2bar you have wrriten asa y3. your lectrz are nice and clear. goodjob and keep it up. i watched most of your videos

[@kalindikumar4018]

yes i too wondered why is it like that

[@i_deepeshmeena]

@@kalindikumar4018 naming conventions can differ results are same

[@kundumehul]

Yes I noticed that too

[@onlysisir]

Why he wrote y3 ...i am still confused 😶😶

[@ujjwal2473]

@@onlysisir human error

[@manaskumarmishra8841]

In the first k-map, the first column will also from a grp as it it has 3 1's and 1 don't care and there will be atotal of 3 terms in Y1 instead of 2.

[@richenjoshi7054]

in the 4:18 truth table, y1 and y0 position is misplaced. if I1 has input 1 then y0=0 and y1=1 but there is y1=0 and y0=1

[@Biggie.Cheese.]

Shouldn't it be Y0= I3+I1I2' instead of Y0=*Y3+I1I2'?

[@soumikrakshit5848]

That's the answer I am getting

[@KishanSingh-up8xj]

Silly Mistake

[@KishanSingh-up8xj]

It happens with every one

[@sufyanparkar9790]

ignore buddy it's avoidable

[@sahildhariya333]

Ohh yes silly mistake bro

[@Official-tk3nc]

at 10:30 it is not Y3 + i1i2bar it should be i3 + ili2bar

[@massivestroke8202]

can someone explain how tf did he fill the truth table ?

[@b747bestplane]

The whole class of ELL201 (second year Digital Electronics course at IITD) watched neso videos for their exams :P

[@shouvikroy3178]

will it be of immense help for the semester...i need to know reply asap...please...

[@b747bestplane]

+Shouvik Roy yes

[@shouvikroy3178]

thanks mate...my sem exam is due next week... thanks for clearing that up..

[@umapathybabu8397]

Alankar Meshram 90

[@kawaranai6742]

And us EE101 kids too (Electrical Engineering at IITG).

[@a.r5409]

Btw.u r a very good tutorial i hav came across for digital electronics. Ur way of teaching is just impressive😊

[@circuitsanalytica4348]

Yes friend you are right....

[@zekariastaye5265]

i'm your best oudiance ...... because you are best. keep it up bro.

[@panduonfiregaming5296]

9:30 sir here y0=i3+i1*i2bar but you wrote y0=y3+i1*i2bar am I correct or wrong sir

[@saurabhkshirsagar6311]

The 3rd and 4th row should be filled with 1, as for those rows I3 is 1 and rest all inputs have don't care condition. Also....... Equation for Y0 needs correction. Y0 = I3 + I2' I1. Thank you... Janhit me jaari.........jai maharashtra

[@nmartoudis]

ok done ;p

[@shankarkhedekar9202]

Jai Maharashtra bhava.........🚩🚩🚩

[@fitnessbro8442]

00:05 Completing the priority encoder 01:25 Priority Encoder Logic 02:49 Priority of i determines output in boolean logic 04:11 Priority encoder and logical expression 05:36 Output is 1 when i2 is 1 07:00 A function y0 is defined based on the values of i0, i1, i2, and i3. 08:26 Minimized function y0 is equal to y3 for the first group and changes in the second group need to be analyzed 09:39 Simplification using K-map for y0 gives two functions.

[@RijaKashyap_18]

The explanation was very helpful. Thanks a lot. But you did a mistake at the end, Yo=I3+I1I2bar, you wrote Y3 instead of I3.

[@214F7Iic0ybZraC]

For Y1, why don't we take into consider "Don't care value" in 0000

[@futzio1249]

in 6:22 can anyone tell me why we can't group the X (don't care) at the top with the 3 ones below it? Shouldn't we treat don't cares as 1’s when can get a larger grouping

[@souravdebnathx]

1M subscribers completed.... Suddenly i seen😎💥💥💥💥💥😁🎊🎊🎊🎊🎊🎊

[@akshay6544]

Sir you just saved my semester...Thank you so much

[@ferb1rahert]

thanks that really clarified the use of K maps on this stuff

[@airduino5484]

friends reallyreally you are the best one on youtube ..... number one ..... thanks thanks thanks ......... 100000000 time

[@rohitbale15]

Really u r gr8.. I understand Ur concepts properly than that of teachers..this lectures will help me to score in DLDA thnx fr this videos..

[@sanjaykarthicks1226]

The best lecture I have ever listened.

[@hikmathasanov]

I3I2 don't care (X) is to be grouped with other corners, because during previous lectures, we were explained that don't care is also to be grouped with largest possible. And doing that, it will add I2/I0/ to the Y2 equation. Please correct me if I am wrong.

[@kennongri]

8:05 third row will not contain 0 . In third row I2 is 1 and I3 is also 1 but in the truth table (4th line) I3 is zero hence row 3 will be fill from the last condition of truth table where i3 is 1.

[@AbhishekSingh-cd6yc]

9:31 wouldn't it be I3 in place of Y3.

[@pavankarnati1555]

Yes

[@aparnamane1164]

good job!!! your voice clearly audible , teaching method crystal clear!!

[@circuitsanalytica4348]

Yes you are right.....

[@brd8764]

The Priority Encoder solves the problems mentioned above by allocating a priority level to each input. The priority encoders output corresponds to the currently active input which has the highest priority. So when an input with a higher priority is present, all other inputs with a lower priority will be ignored. Interrupt processing. It is automatic improvisation. It is done logically which is unreally.

[@semihsenyuz7436]

5:42 I2 = 1 but I3 = 0 because you need to mark only second row than I3 = 1 you can mark remaining two rows.the rout is wrong but the result is correct.

[@semihsenyuz7436]

if you say so.

[@shadabsiddiqui28]

you are a wonderful teacher, best ever in my life from school to college

[@circuitsanalytica4348]

Yes you are right bro....

[@nitinsingh1209]

the kmap for y0 is wrong. it's clearly visible that inplace of don't care condition, there should be 1.

[@dipubansal2768]

True

[@dipubansal2768]

but the fact we take don't cares 1 when we have to make pairs of 1 and one's are left . but in this case there is no 1's left so we will leave don't cares as such

[@Official-tk3nc]

omg bhai tum yeha ho. Luckily i found you Where are you now?

[@nickem7]

Hi, nice presentation! I want to ask around 2:23 when I3=0, I2=0, I1=1, why Y1=0 and Y2=1?

[@viewerspeaks5414]

+nickem7 Because the LSb is y1 MSb is y2 and the binary of 1 is 01 so y1=0 and y2 =1

[@ElFreakingBurro]

this is such a good god damn channel

[@TheHonchoofAllSpearheads]

Something just doesn't quite add up at 5:50 smack dab. Looking at your truth table when I0,I1,I2,I3 = X,X,1,0 respectively, how could you simply regard to mark 1s in the row of the Y1 K-map which have I2 coordinate 1? You know what I mean? I3 here is 0 so marking 1s on the row with I3 that happens to be 1 is not right despite I2 is the same for both rows, i.e. 1. Need you to shed some light on this please ASAP. P.S. Hah! But it's a sweet escape for you that some people may not spot this flaw when you come to the part I3 = 1 and then you just 1 out all the cells with coordinate I3 = 1. But honestly the former u did was wrong with a line you mentioned "but we have already put 1s here in this row, the only thing left is to put 1 in all the cells of the last row". you wud drive ppl into thinking the wrong concept.

[@ozfrox]

+TheHoncho`o`fAllSpearheads Yes i spotted that also. Otherwise excellent video!

[@tusharvats5393]

ya he did that 4 both the maps ...

[@PetBuddies]

From 2:33 to 4:30 I just couldn't understand the whole point for setting values for Y1 and Y0. You should have said in order to encode I0 we need to put Y1=Y0 = 0, to encode I1 we need to encode Y1 =0 and Y0=1 and so on

[@hamzakhader4497]

thank you for explaining , but at 5:46 you put 1's at 01 and 11 , but the condition was 01xx not x1xx

[@Berat-Tezer]

Can anyone explain 08:05? 1x can be 10 or 11, i think this makes the 3rd row 1 1 1 1

[@pushkarshaw233]

Yes

[@rajeshgurjar1310]

Very nice explanation 👍👌

[@rjch1729]

Sir at 9:08 in the third row there should be all. 1's Please reply 🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻🙏🏻

[@amitharajkumar7916]

Good presentation for priority encoder. Please check the output expression for y2 and correct it.

[@abiramicheran3755]

sir good afternoon how r u ?

[@ScrolltheNature]

You are awesome !! Please simplify other subjects as well like signal & system & communication systems. :)

[@Official-tk3nc]

My only reason to recharge my mobile is to watch neso academy in youtube

[@snehashishbanerjee2575]

Nice one!

[@inamullah1417]

for the 2nd K-map it should be Y0 = I3 + I2.I1 instead of Y1 = Y0 = Y3 + I2.I1

[@saidulislamsayem9278]

9:31 shouldn't it be I3 >.....where did Y3 come from?

[@94D33M]

you're right, it's I3, also he accidentally called the 3rd row as don't care, but it should have been '1'

[@ranjeetsingh3270]

At 5:40 and 7:55 when you write I2 is 1 at that time I3 is 0 so how can you fill both the rows simultaneously cause we should have take care of I3 also

[@avisheksinha4264]

Thanks a lot sir..You are awesome.. You explain all the videos nicely😇

[@akshay_mittha]

For last k map can we say that I3 has higgest priority so the 3 row can be considered as 1

[@JASMEETSINGH-hx3mw]

At 7:43 in this video...when I1 is 1 why the whole 3rd and 4th column are not 1 but only 2 1's are written

[@EliphasAyamba]

You are very speedy in explanation

[@lyfissad4803]

5:46 but the first bit is zero on the table why did you fill the third row of cells when is labeled as two one bits the first bit on the table and the k-map is different.

[@michaelknox3248]

I totally understood everything you have said. Excellent!

[@circuitsanalytica4348]

Yes, you are right.....

[@vishalagrawal6060]

Yo = I3 + I1+ I2(bar) . lesson is very helpful . please do correction so that other viewers are not misguided. Thankyou

[@ashwiniojha1171]

ur answer is wrong check again using k map

[@sanjeevkumarshukla4652]

vishal agrawal , i got thay too

[@sanjeevkumarshukla4652]

vishal agrawal *that

[@SanjeevSharma-gy4eq]

There is also a correction in your logic i.e. Y○= I3 + I1*I2 (bar)

[@ryuuuzai0711]

Dude you wrong ;)

[@adityamaheshwari8536]

well explained... and i just spotted a small mistake which may create confusion .. so just consider ,its the expression for Yo. Replace of y3 by i3

[@venu6469]

I can't understand that how the values of Y1 and Y2 are coming, help me sir🙏

[@pawansharma6226]

see, its the binary represantation of the number...... like if priority is given to I3 then binary of 3 is 1 1..... similarly if priority is given to I2 then binary of 2 is 1 0 also for I1, 1= 0 1.......

[@circuitsanalytica4348]

I hope you had understood the concept.....

[@a.r5409]

I think something wrong u hv done in k mapping for Yo output🤔🤔 I mean the ansr is ryt.but the cocept that u have used to fill k map is not satisying

[@sarthakgupta5064]

actually while maiking the k-map , they are ignoring the don't care value , so for 01 xx , we just need to check row/column corresponding to I3I2 as 01 and ignore I1I0 as xx

[@harshvardhansingh8428]

Yes thereo is blunder in this video, mistaken

[@harshvardhansingh8428]

@Gowtham M prajwal wrong hai Bhai, kyon confuse kr raha hai

[@Lexpanthera]

this is an Active High priority encoder, it should be labeled. I for instance am looking for a demonstration of an active low priority encoder.

[@abhishektiwari_369]

@8:00 instead of zero placing in 11(i2i3) row can't we take 1 because of priority of i3 says yo will be 1

[@Srimatrenamaha-goddess]

Thank u sir, I easily understood this.Now I am ready to write this question in exam

[@bgmibrutal4347]

could not understand how you got "Y3" in the maximize "Y0" at 9:30 ... Y0=Y3+..... pls help ....how did we get this Y3

[@maani315]

there is no use of i0 in the final expressions, so doesnt it become a 3-2 encoder....you havent used the concept of valid bit and if you would have done so, there was an involvement of i0 in the circuit, what is really a 4-2 encoder not a 3-2....plz explain

[@Furkan-vt1yk]

9:26 where does the Y3 comes from?

[@redeyegamer4101]

Man......keep it Up and do also for Computer science Architechture

[@bluemohit1999]

While solving the K-Map for Y2, why can't we make the 2nd group as a group of two 1s only instead of four (as is done in the video)? Doing it this way gives, Y2 = I3 + I1.I2'.I3' instead of Y2 = I3 + I1.I2'

[@vanshraj6772]

using property x + yx' = x + y

[@vy_0076]

It should be I3 instead of Y3!! @9:29

[@garethbale3216]

that 2nd k-map error is not a big deal...as Y(o) remains the same... actually we dont need to put those 0's in the k-map...the 1's will do (to avoid mixing)... and those who hv problem they need to restart the video(and understand the concept).

[@sandyarubiya9214]

Thanq sir. Nice explanation

[@vigneshkamath3287]

Why didn't you make the 3rd and 4th column as 1 since I1 is 1 in those columns just like you did for I3 in the Y1 K map

[@ArnavVerma-oy4dc]

sir for Y1 Kmap, why didnt you use don't care as 1 because that is what we do ? please be a little clear as in some cases you use as 1 and rest you don't , plz explain your steps

[@algorithm.vibes._]

Please don't make mistakes it will confuse us

[@Its_________bansal4821]

There should be a correction. I think,there should be 1 at the place of X in the K-map for Y0

[@shikharsrivastava5819]

8:42 Actually no contradiction is there. 3rd row is 1 only not Don't care, I think.

[@mdnooruzzaman3228]

In the K-map for Y1, you said, since I2 is 1, we can say all the elements in rows 2 and 3 are 1. But consider row 3, here I3 is 1, can I say row 3 is 1 as I2 is 1? I do not think so. Row 3 is one because I3 is 1. Is not it?

[@ritikshrivastava9442]

how did you made k map means how did you selected the variable

[@tarabisht7549]

In filling the k-map entries for I2=1 & I3=0 (when Y1=0 for 2nd time) u hv filled both 2nd & 3rd row of k-map as 1. But this should not be done! U should fill only 2nd row. (& That's why the contradiction happened while filling the 2nd k-map)

[@anjpunk]

Awesome! You saved me in last minute prep.

[@Wanderlens143]

Outputs are Y1 and Y2 ....why u wrote Y0 in place of Y2 in truthtable sir

[@thecodingdice3107]

10:43 there was a mistake that was Y0=I3+I.I2 bar you wrote Y3 ...

[@harmanpreetsingh6131]

I can't understand the outputs 😶 How are we getting outputs