What is Digital Signal? Neso Academy

Digital Electronics: What is Digital Signal?

Contribute: http://www.nesoacademy.org/donate

Take the Quiz: https://goo.gl/6OqU3R

Website ► http://nesoacademy.org/
Subscribe ► https://www.youtube.com/user/nesoacad...
Facebook ► https://goo.gl/Nt0PmB
Twitter ► https://twitter.com/nesoacademy
Pinterest ► http://www.pinterest.com/nesoacademy/

Best comment

1. SHORON: u find the ans?
2. bale: I M LOVING THESE LECTURES thanq so much neso academy
3. Neso Academy: Strictly speaking, it will never act as discrete, because in case of digital signals we discretise the magnitude axis and this means there are values, which signal can't take (even if you increase number of levels). On the other hand, in case of discrete time signals, it can take any value. So there is clear difference between them. Please let me know if your doubt is clear.
4. Kai Su: what is that intro music? I know it from somewhere but I don't know from where! Can't think about anything else!
5. manojkumar subramaniam: I am new to electronics , i think we need digital signal for easier build of computer task , such Microcontroller
6. Atanu Sarkar: I have a question regarding the definition of "Digital Signal". 0:11 Is the time axis only descritised or both time 't' and value 'T(t)' axises are descritised ?? Here in this video, it says both time 't' and value 'T(t)' axises are descritised, but at other places, it says only the time axis is descritised and Y axis can take any values! someone, please clear this out. https://electronics.stackexchange.com/questions/352784/in-digital-systems-do-we-discretize-both-time-and-magnitude-or-only-time
7. Abhi vish: sir, plz make video for DEGITAL TO ANALOG & ANALOG TO DIGITAL CONVERTER.
8. Aziz Mohammadpour: these are the best Lectures I searched In network as Digital electronic , I watched whole of your videos . they are really SO helpful . if you have tutorial of this series in more detail and or about ALU i would Like to Buy your CDs. Thank you
9. Mayank Singh: same doubt sir
10. SHORON: +pankaj misra thanks
11. Yash Raj: anita jain just to minimize the error. Well in digital we don't always take 0,1 we take pulsating signal. For eg we provide a electrical system some conditions that output is turned on i.e. 1 when the input (voltage or current) is equal or nearly equal to our provided conditions that condition( these conditions are levels) Another example- you might have listened about Arduino, it supports 5v dc signal but it will give output 1 when i/p voltage range is between 3v to 5v and will give o/p 0 when i/p voltage range is less than 3v
12. Medha Chhillar: amazing explanation!! i am a fan of your presentations could you please tell me how to prepare for NET exam?
13. Mohd Suleman: Nice work plzz can u add verilog hdl to your playlist @nesoacademy
14. Ankit Kumar: If possible then Upload more video on ECE subjects...
15. jayati saxena: book by Morris Mano is the best book for digital electronics.
16. Duy Dang: Why select lower level? Signal either reaches minimum threshold (true) or not (false).
17. Danish Bhatia: Wht do u mean sir, if we redice the increase the levels, then it will again behaves line discrete and if we increase more and more levels then there will be a situation where it behaves like analog signal.
18. Shekhar Limbu: I believe that's because an unwanted noise will always increase the magnitude of the original pure signal and it only makes sense if we take the lower value which will be closer to the actual value. I understood this in their next video
19. Roshan Kumar Yadav: sir please make a video on how to convert analog signal into a digital signal
20. Phanindra Reddy: We want videos on network analysis
21. Venkataramana Mupparaju: Thank you sir for your proper exp. But here i have one doubt is <> (here my doubt is how juse level 2= 2volts.it has to equal to 1.25 only by u r exp). In practical it doesnt work,asu exp it should lower level(1.25) CAN ANY ONE EXPLY IT?
22. Stephan Strauss: May i Ask you which software you use for the black board. thx a lot
23. Madhubala Murali: Please do read the comments neso...try to upload videos of network theory and other subjects of ece as soon as u can.
24. lokesh amara: In the first example to decrease error, the value of 9 volt should be taken as 15 volt or 0 volt?
25. kirti parmar: ur all lectures r awsome
26. Neso Academy: +Venkataramana Mupparaju You missed it when I increased the number of levels.
27. anita jain: sir in digital signal we n take only two values either 0 or 1 then whg did u discriminate 0-5 in 5 parts ??
28. Muzammil Syed: plz change ur intro music is very horer for me y coz i usally saw ur vdo one day before exam and that was a night tym so i usually scare :)
29. Em Manuel: lokesh amara we always take lower values to quantized any quantity between the two levels sa quantizing 9V to 0V is fully correct and to minimize the error we don't consider the min. difference between the two values, in digital to reduce the error we always increase the no. of levels like if we discretised the mag. axis like 0,5,10,15......45 then 9V get quantized to 5V and now the error is 9-5=4V and if u want to decrease the error more inc. no. of levels again and so on.
30. Em Manuel: anita jain 0 and 1 are the symbols with which we represent data like binary data etc. and those dicretised values on mag. axis are levels and yash raj explained rest of the things well about levels. hope this may clear ur doubt sister.
31. Neso Academy: +kirti parmar Thank you!
32. pankaj misra: +SHORON SMART Notebook try this
33. xamiiid 51: i'm starting to study Digital Electronics in my next semester and i wish i will be connected to your channel Sir. Humble request: May you give me some advice about this course?? interms of books,websites and also what you can give me as extra. thank you
34. Em Manuel: Danish Bhatia in discrete signal in magnitude axis we can take infinite values of magnitude between 0 to 45c of respected quantity,but in digital we can't do so,we can take only finite dicretised levels between o to 45c of respected quantity so chances of error definitely increases in digital signal.
35. Pradyuman Kumar: Sir, While we increase the no. of levels then , isnt it eqaual to analogue signal , which is contradictory !!
36. Danish Bhatia: sir, if we increase the no of levels, then it will again acts as discrete.????? so what about digital?
37. Vimal shukla: If I divide the number of levels between 0 and 5 into 6 equal parts, and then locate V = 2Volt, error would be non zero. This contradicts the theory that the increase in number of levels reduces the approximation error. Rather I think this theory is specific to the exact magnitude of the value to be mapped. If the value to be mapped matches with the multiples of it, error is minimized.
38. courtesy55: At 6:25 when you subtract 15-9=6 since 6 is only the difference between 15 and 9 how does adding 6 make it correct? I mean if you were too add 6 too 11 how would that make the difference come through?
39. Danish Bhatia: I recognised.
40. kalyani ramisetti: What is the reason behind selecting a low level other than selecting a level which has min difference?
41. Prateek Tripathi: THANKS SIR
42. Vikram Varanwal: please more clearrfy this lecture speciall the "error" part in second graph example of voltage
43. yogananda13589: Sir, reference books please, to accompany these videos. Great explanations.
44. Sakshi Khanwani: Lectures are very helpful.Can you please refer a book for digital electronics?
45. tota salam: best teacher ever thank you so much
46. utkarsh gupta: To feed anything in Computer..??
47. Danish Bhatia: Yes, it has been cleared. Sir, humble request is that please cover up the remaining syllabus , i am preparing for gate, and i choose your channel except NPTEL lectures. I hope it will helpful. U are doing a good job.

What is Digital Signal?
135,630 views views	468,989 followers
470 Likes	470 Dislikes
Education	Upload TimePublished on 27 Oct 2015