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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
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Home / Digital Electronics / Flip Flop Conversion
Flip Flop Conversion Last Updated on March 7, 2012 by john in Digital Electronics with 53 Comments
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For the conversion of one flip flop to another, a combinational circuit has to be designed first. If a JK Flip Flop is required, the inputs are given to the combinational circuit and the output of the combinational circuit is connected to the inputs of the actual flip flop. Thus, the output of the actual flip flop is the output of the required flip flop. In this post, the following flip flop conversions will be explained. SR Flip Flop to JK Flip Flop JK Flip Flop to SR Flip Flop SR Flip Flop to D Flip Flop D Flip Flop to SR Flip Flop JK Flip Flop to T Flip Flop JK Flip Flop to D Flip Flop D Flip Flop to JK Flip Flop SR Flip Flop to JK Flip Flop As told earlier, J and K will be given as external inputs to S and R. As shown in the logic diagram below, S and R will be the outputs of the combinational circuit. The truth tables for the flip flop conversion are given below. The present state is represented by Qp and Qp+1 is the next state to be obtained when the J and K inputs are applied.
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
For two inputs J and K, there will be eight possible combinations. For each combination of J, K and Qp, the corresponding Qp+1 states are found. Qp+1 simply suggests the future values to be obtained by the JK flip flop after the value of Qp. The table is then completed by writing the values of S and R required to get each Qp+1 from the corresponding Qp. That is, the values of S and R that are required to change the state of the flip flop from Qp to Qp+1 are written.
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SR Flip Flop to JK Flip Flop
JK Flip Flop to SR Flip Flop This will be the reverse process of the above explained conversion. S and R will be the external inputs to J and K. As shown in the logic diagram below, J and K will be the outputs of the combinational circuit. Thus, the values of J and K have to be obtained in of S, R and Qp. The logic diagram is shown below. A conversion table is to be written using S, R, Qp, Qp+1, J and K. For two inputs, S and R, eight combinations are made. For each combination, the corresponding Qp+1 outputs are found ut. The outputs for the combinations of S=1 and R=1 are not permitted for an SR flip flop. Thus the outputs are considered invalid and the J and K values are taken as “don’t cares”.
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
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As shown in the figure, S and R are the actual inputs of the flip flop and D is the external input of the flip flop. The four combinations, the logic diagram, conversion table, and the K-map for S and R in of D and Qp are shown below.
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D is the actual input of the flip flop and S and R are the external inputs. Eight possible combinations are achieved from the external inputs S, R and Qp. But, since the combination of S=1 and R=1 are invalid, the values of Qp+1 and D are considered as “don’t cares”. The
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logic diagram showing the conversion from D to SR, and the K-map for D in of S, R and Qp are shown below.
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
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JK Flip Flop to T Flip Flop J and K are the actual inputs of the flip flop and T is taken as the external input for conversion. Four combinations are produced with T and Qp. J and K are expressed in of T and Qp. The conversion table, K-maps, and the logic diagram are given below.
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JK Flip Flop to T Flip Flop
JK Flip Flop to D Flip Flop D is the external input and J and K are the actual inputs of the flip flop. D and Qp make four combinations. J and K are expressed in of D and Qp. The four combination conversion table, the Kmaps for J and K in of D and Qp, and the logic diagram showing the conversion from JK to D are given below.
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JK Flip Flop to D Flip Flop
D Flip Flop to JK Flip Flop
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
In this conversion, D is the actual input to the flip flop and J and K are the external inputs. J, K and Qp make eight possible combinations, as shown in the conversion table below. D is expressed in of J, K and Qp.
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The conversion table, the K-map for D in of J, K and Qp and the logic diagram showing the conversion from D to JK are given in the figure below.
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
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waqas June 19, 2015 at 8:03 am Thank you so much for these flip flop conversions Reply
burhan on 100 Watt sub woofer amplifier. takudzwa muswaka on How to Interface GSM Module and Arduino-Send and Receive SMS
aravind May 18, 2015 at 5:08 am there is a mistake in the SR flipflop to JK flipflop where S=(~J)*Qp. Reply
jojo on RFID Based Access Control System using 8051 jojo on How to Interface GSM Module and Arduino-Send and Receive SMS
ALOK April 11, 2015 at 8:59 pm THANKS Reply
snehrahul March 31, 2015 at 7:23 am
jojo on How to Interface GSM Module and Arduino-Send and Receive SMS
How to convert sr flip flop to t flip flip? Reply
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RAHUL KESHRI December 18, 2014 at 5:05 am
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Y r we not paring with don’t cares..??? Since we are pairing with don’t cares in each conversion…
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Navneet Toor December 6, 2014 at 5:52 am
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very helpful……. great job Reply
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saifuddin mallick November 28, 2014 at 6:04 pm this is awsome.it is very helpfull to me for checking my task is correct or not……..thanks a megaton Reply
Abhi November 28, 2014 at 2:30 am yeah this is very helpful but one mistake is there.in SR toJK flip flop the eqn for s will be http://www.circuitstoday.com/flipflopconversion
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
S=J*Qp bar . Reply
Shreya November 26, 2014 at 9:24 pm very easily explained.Thanks a lot Reply
Amit November 19, 2014 at 10:50 pm Very helpful….i clear this topic.. Reply
keshav sharma November 12, 2014 at 6:36 am it is very useful 4 me thanks for u Reply
Umesh August 24, 2014 at 9:06 pm Wonderful explanation. Easy language used. Very easy to learn! Thanks a ton! Reply
muhammad haris May 8, 2014 at 9:27 pm Its very clear and understandable , thank u so much. Reply
Rajesh Hanswal May 6, 2014 at 6:46 am It will be S=J*(Q_p)’ in S-R to J-K conversion instead of J’*(Q_p) this error is in the K-Map Solution for S. Otherwise it is very good content and very useful.. Thanx Reply
y.ramesh May 1, 2014 at 2:10 am it is very useful to me thanks…………. Reply
Debadrito April 20, 2014 at 8:25 am These information are very helpful for those who want to know about flip flop. It is wonderful. Reply
Mike April 11, 2014 at 3:07 pm http://www.circuitstoday.com/flipflopconversion
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
This was wonderful. I am going to tell my classmates about it. Our professor just couldn’t seem to explain it this clearly, so this really helped. Thanks! Reply
Mohamed Abuelanin March 30, 2014 at 4:59 pm In the SR Flip Flop to D Flip Flop there is a mistake in the R K-Map the term (1) should be “1” not “0” Reply
sumanti February 28, 2014 at 5:36 am found it helpful for writing exam … ACTUALLY COYING DURING THE EXAM KEEP IT UP !!!!!!! Reply
Tarek Jreidini December 17, 2013 at 6:20 pm thank you so much my exam’s in 4 hours i needed this Reply
Tiago December 16, 2013 at 3:07 pm Awesome. Thanks. Althought there’s an error on the JK Flip Flop to D Flip Flop table. Last line. Qp+1 should be 1 and not 0. But the corresponding JK Inputs are correct. This said, everything is good except Qp+1. Reply
Tarun December 1, 2013 at 8:52 pm Thanks A bunch…:-) Reply
Richu November 28, 2013 at 12:25 am was really helpful…….thanks a bunch Reply
Bharatish Puranik November 20, 2013 at 8:11 am That Was awesome….gracias… Reply
rahul kumar October 27, 2013 at 6:21 am please try to keep the solution for D-ff to T-ff conversion http://www.circuitstoday.com/flipflopconversion
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D Reply
vijay kumar October 21, 2013 at 10:27 am can i have details about D flip flop to SR flip flop using NOR gates only. Reply
isabel October 12, 2013 at 7:21 pm muy buen contenido …gracias Reply
Jeny October 5, 2013 at 8:21 am thank u very much…!! its up to the point and brief. Reply
aan September 22, 2013 at 3:25 am very helpful.thankyou Reply
JITENDRA KHATIK August 19, 2013 at 11:03 am simply awsom…..helpfull… Reply
Terry July 26, 2013 at 2:41 pm Very useful! Thank u very much! Reply
gyanendra July 12, 2013 at 10:24 pm thankyou so much!!! Reply
Sarang June 12, 2013 at 11:35 am Thank you so much…Saved me Reply
MUsa May 12, 2013 at 3:44 pm Thanks a lot This is nice site for digital logic Reply
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
Santosh Kumar Patel April 6, 2013 at 11:44 am Thank’s you so much it is good details for digital information. i will com back in your web sites. Reply
ammar March 23, 2013 at 1:45 am Thanks a lot I hope if there is a suitable reference (student language not complex teacher language methods) for digital communication and for digital system design ?? Reply
varinder insa March 6, 2013 at 8:55 am its so so interesting & excellent Reply
Martin February 14, 2013 at 10:02 pm This is very interesting… Reply
alireza February 14, 2013 at 12:46 am thanks Reply
John G. Parisi March 21, 2013 at 12:24 pm Alireza I worked in the Postal Service, it had a large training section where we laearned to service electronic equipment. It was located in Norman, Oklament. At the University of Oklahoma. The last equipment I woked on was the Optical Cahriter Reader (OCR) the hardest logic I had to learn was the Master Slave J K Flipflop. I finnaly learned how it worked just before the test that was given every Friday. Well that was the only question I missed on the test. The instructor had a way to change just a little of something different. Reply
pain December 30, 2012 at 2:36 am thank u Reply
jatinder December 9, 2012 at 6:39 am http://www.circuitstoday.com/flipflopconversion
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
good one and thanks dude for help me for this topic ……… Reply
Arunraj K December 4, 2012 at 11:20 pm Thanks a lot. It will help to brush up my skills. Reply
Arvind December 3, 2012 at 11:05 pm Excellent!!! very helpful Reply
Lakshya November 21, 2012 at 4:31 am Perfect ! Now I think i can convert any flip flop to other ! Thanks a lot ! Reply
baiduryakanti majumder November 7, 2012 at 8:46 am the figure in the conversion of jk to d is slightly incorrect … the last row in the conversion table should be corrected…i feel …. please comment if i am wrong… Reply
farhaan September 26, 2012 at 6:50 pm thank you very much.the explanations is quite simple and very easy to understand.please also post on s. Reply
LeDinhTan July 29, 2012 at 9:50 pm Excellent! Thank you very much. Reply
Sandip mangukiya July 23, 2012 at 10:04 am very good.explanation is quite simple and fundamentally stupedous Reply
masoomeh July 21, 2012 at 6:12 am Excellent! Thank you. Reply
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Flip Flop ConversionSR to JK,JK to SR, SR to D,D to SR,JK to T,JK to D
Romel April 8, 2012 at 7:15 am Thank you very much john. Much needed topics!! Reply
Rakesh March 3, 2012 at 1:03 am you worked really hard Mr. john. You concentrated upon a very useful topic. Reply
poki July 29, 2013 at 8:28 pm Excellent! Thank you so much! Reply
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