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31st May 2008, 16:27 #1
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Design of Counters using JK flip flops
Hi, I want the procedure to Design of Counters using JK flip flops. I have seen question like, some input & output equations will be given & we should provide the state diagram, state table, state equation & logic (circuit) diagram.
I don't know if its a synchronous or asynchronous?
Bye,
PRAVARDHAN

31st May 2008, 16:27

1st June 2008, 19:53 #2
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Re: Design of Counters using JK flip flops
this is a bistable multivi brator.
for circuits see this
Added after 27 seconds:
http://www.playhookey.com/digital/j...flipflop.html

2nd June 2008, 08:23 #3
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Design of Counters using JK flip flops
pravardhan,...
What kind of counters (BCD, binary, Decimal, updown,...)?
All can be designed using state diagrams and KMap.
I have a lot of designes, just name the counter and I'll provide you with design.

2nd June 2008, 11:27 #4
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Re: Design of Counters using JK flip flops
Try this:

2nd June 2008, 11:27

2nd June 2008, 16:13 #5
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Re: Design of Counters using JK flip flops
Ok, the question is like this:
A sequential circuit has two flip flops (A and B), two inputs (x and y) and an output z. The flip flop functions and the circuit output functions are as follows:
JA = xB+yB' KA = xy'B'
JB = xA' KB = xy'+A
z = xyA+x'y'B
Obtain:
a) logic diagram
b) state table
c) state diagram
d) state equations
The question is taken from the Book:
Digital logic and computer design by Morris Mano.
The page number is 254 & question number is 613.
The partial answer is given in page no. 597
But, i couldn't get how he formed the table?
Thanks in advance,
PRAVARDHAN

3rd June 2008, 14:59 #6
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Design of Counters using JK flip flops
I'm sorry, but.. What are the (x and y)? The inputs of what?
The two Flip_Flops have (JA,KA,QA,Q'A,JB,KB,QB,Q'B) what are the (x and y)?

3rd June 2008, 15:33 #7
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Re: Design of Counters using JK flip flops
Hi seadolphine,
Um.. There will be some gates between the FlipFlops and the two inputs  x & y, as well as at the output.
And, the outputs of flipflops are A,A',B & B' and the inputs are JA,KA,JB & KB.
Bye,
PRAVARDHAN

3rd December 2009, 16:13 #8
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Re: Design of Counters using JK flip flops
Originally Posted by seadolphine2000
can you provide me a design of counter up and down 099/990 ???
:D

3rd December 2009, 16:13

20th December 2009, 20:01 #9
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Re: Design of Counters using JK flip flops
The following link shows you not only how to design the multivibrator circuit but also how to present the work:
http://www.teahlab.com/multivibrator...rslaveff.html#
Let me know if you have more questions.
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