4 votes 4 votes Advantage of synchronous sequential circuits over asynchronous one is : Lower hardware requirement Better noise immunity Faster operation All of the above Digital Logic isro2017 digital-logic digital-circuits bad-question + – sh!va asked May 7, 2017 • edited Jun 10, 2020 by Sabiha banu sh!va 10.7k views answer comment Share Follow See all 11 Comments See all 11 11 Comments reply ManojK commented May 8, 2017 reply Follow Share I think none of the above answer is correct.Someone verify. 1 votes 1 votes Arjun commented May 8, 2017 reply Follow Share b is obvious rt? 0 votes 0 votes ManojK commented May 8, 2017 reply Follow Share Sir ,check the below link. click here 1 votes 1 votes Arjun commented May 8, 2017 reply Follow Share That also says option b rt? 0 votes 0 votes ManojK commented May 8, 2017 reply Follow Share Sir, I don,t know but it's saying: Asynchronous circuits seem to be a good candidate to alleviate the problems originated by simultaneous switching noise.So I think B is also not correct. Sir, Actually I am not able to interpret these statement correctly. 1 votes 1 votes Arjun commented May 8, 2017 reply Follow Share However, they are also more sensitive than synchronous ones to spurious signal transitions and delay variations produced by crosstalk noise. If we think simple, synchronous circuits have better noise immunity and this should be given in digital logic texts. 1 votes 1 votes Ciado commented May 8, 2017 reply Follow Share As latches are level triggered, any noise during the level will affect their output right? 0 votes 0 votes Bikram commented May 26, 2017 reply Follow Share @arjun you said it reverse .. " If we think simple, synchronous circuits have better noise immunity " - This is reverse statement as you said . This paper says " "Asynchronous circuits seem to be a good candidate to reduce the problems originated by simultaneous switching noise. However, they are also more sensitive than synchronous ones to spurious signal transitions .... " This line means asynchronous circuits are better to handle noise than synchronous circuits . So option B is not true here.. as question asked Advantage of synchronous sequential circuits over asynchronous one . @Manojk @kapil and @sh!va please cross check it once .. 2 votes 2 votes Bikram commented May 27, 2017 reply Follow Share Another proof according to this paragraph asynchronous circuits have better noise immunity than synchronous ones ... 2 votes 2 votes Digvijaysingh Gautam commented May 27, 2017 reply Follow Share I got this from Wikipedia. Check this link https://en.wikipedia.org/wiki/Asynchronous_circuit In the Benefits tab we can get following info Less severe electromagnetic interference (EMI). Synchronous circuits create a great deal of EMI in the frequency band at (or very near) their clock frequency and its harmonics; asynchronous circuits generate EMI patterns which are much more evenly spread across the spectrum. In asynchronous circuits, local signaling eliminates the need for global synchronization which exploits some potential advantages in comparison with synchronous ones. They have shown potential specifications in low power consumption, design reuse, improved noise immunity and electromagnetic compatibility. Asynchronous circuits are more tolerant to process variations and external voltage fluctuations. So I also think option B is wrong 2 votes 2 votes anchitjindal07 commented May 27, 2017 reply Follow Share @Arjun Sir Can u please explain in more detail why option B is correct 0 votes 0 votes Please log in or register to add a comment.
5 votes 5 votes no option is correct i copied and pasted the bikram sir comment because this content is good but nobody is focusing on this comment due to large no of comment in this question(all below content is copy paste i did not change anything) Option A : Lower hardware requirement , is also wrong option . Plz read my below analysis : Question asked advantage of synchronous circuits over asynchronous ones .. see below table for Synchronous Vs Asynchronous Synchronous Sequential Circuit is based on state time defined by external means such as clock. Asynchronous Sequential Circuit is a circuit whose state time depends solely upon the internal logic circuit delays. [1] Logic Gates are required based on design No extra Logic Gates are required [2] In Synchronous circuit memory element or digital storage is there and cost is more due to extra hardware. In Asynchronous ones no such memory element present and cost is also less.[3] See the first diagram here [3] http://www.ee.surrey.ac.uk/Projects/CAL/seq-switching/synchronous_and_asynchronous_cir.htm All these points only means that Asynchronous circuit have less hardware requirement than Synchronous ones .. and the question asked reverse !! References: [1] http://verticalhorizons.in/difference-between-synchronous-and-asynchronous-sequential-circuit/ [2] http://www.navodayaengg.in/wp-content/uploads/2015/09/U6-L_47-Difference-between-Asynchronous-and-Synchronous-Counter1.pdf Hope i am clear now , this question is Wrongly framed and no options are correct !! Gurdeep Saini answered Mar 6, 2019 Gurdeep Saini comment Share Follow See all 0 reply Please log in or register to add a comment.
1 votes 1 votes Synchronous circuits need additional hardware, so Option A is incorrect. Since they need additional hardware, they can't be faster than Asynchronous circuits. Option C is incorrect. Source: http://www.ee.surrey.ac.uk/Projects/CAL/seq-switching/synchronous_and_asynchronous_cir.htm Asynchronous circuits have better noise immunity than synchronous circuits. Option C is incorrect. Asynchronous circuits feature lower overall power consumption and reduce noise and electromagnetic radiation by more uniformly consuming power Source: https://m.eet.com/media/1137899/293234.pdf So, none of the given options is correct. JashanArora answered Dec 10, 2019 JashanArora comment Share Follow See all 0 reply Please log in or register to add a comment.
0 votes 0 votes A is the best answer here. Synchronous circuits need less stringent hazard management mechanism. https://gateoverflow.in/516/gate1991-03-ii Arjun answered May 9, 2017 Arjun comment Share Follow See all 9 Comments See all 9 9 Comments reply Show 6 previous comments Bikram commented May 30, 2017 reply Follow Share @Arjun and @anchitjindal Option A : Lower hardware requirement , is also wrong option . Plz read my below analysis : Question asked advantage of synchronous circuits over asynchronous ones .. see below table for Synchronous Vs Asynchronous Synchronous Sequential Circuit is based on state time defined by external means such as clock. Asynchronous Sequential Circuit is a circuit whose state time depends solely upon the internal logic circuit delays. [1] Logic Gates are required based on design No extra Logic Gates are required [2] In Synchronous circuit memory element or digital storage is there and cost is more due to extra hardware. In Asynchronous ones no such memory element present and cost is also less .[3] See the first diagram here [3] http://www.ee.surrey.ac.uk/Projects/CAL/seq-switching/synchronous_and_asynchronous_cir.htm All these points only means that Asynchronous circuit have less hardware requirement than Synchronous ones .. and the question asked reverse !! References: [1] http://verticalhorizons.in/difference-between-synchronous-and-asynchronous-sequential-circuit/ [2] http://www.navodayaengg.in/wp-content/uploads/2015/09/U6-L_47-Difference-between-Asynchronous-and-Synchronous-Counter1.pdf Hope i am clear now , this question is Wrongly framed and no options are correct !! 4 votes 4 votes Arjun commented Jun 27, 2017 reply Follow Share ISRO key says none of the options are correct :) 5 votes 5 votes Bikram commented Jun 27, 2017 reply Follow Share @arjun I told the same in my above comments :) i know it was wrongly framed !! 7 votes 7 votes Please log in or register to add a comment.