Hi I need your help in getting following result
T B Y
1 1 1 1 0 1 0 0 0 1 0 0 again this cycle will be repeated. where T and B are inputs and Y is the output.I dont have any more inputs to get my required Y boolean equation.I tried many ways i am not getting help me guys.thanks in advance
Well, at least this homework problem is out in the open. This isn't a combinatoric logic problem, because lines 2 and 4 have the same inputs and a different output. It sounds like you're being asked to design a small state machine, or at least something with gates and feedback.
As a Boolean logic problem, this table is both incomplete (it's missing input state T=0, B=1) and self-contradictory, as above. Please check it.
Cheers
Phil Hobbs
Do you mean, sometimes 1 & 0 yields 1, and sometimes 1 & 0 yeilds 0?
How do you decide which one to choose in any given instance? It might simply be impossible, without more information.
Are you sure you copied the test question down accurately?
Thanks, Rich
Maybe T and B both have to go high to make Y go high, and they both have to go low to make Y go low. So look at the list as a sequence rather than a plain truth table.
If you stated it correctly, B is irrelevant for an output change from 1 to 0. The output changes from 1 to 0 only when T changes from 1 to 0.
Going the other direction on the output, from 0 to 1, apparently requires that B change from 0 to 1.
So, guessing set and reset, based on incomplete information.
Ed
Your problem can't be solved with pure combinational logic.
Please make sure you haven't made a typographical error.
If not, have you had "sequential" logic instruction in your class?
...Jim Thompson
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Problem is not clear so is your question. Information incomplete and/ or wrong.
petrus bitbyter
Do it like this...
...Jim Thompson
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| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
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Stormy on the East Coast today... due to Bush\'s failed policies.
*** > 1 0 1 ***> 1 0 0
Oops!
I think you'd better restate your homework problem. ;^)
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
Looking at your circuit I'm not seeing how you make T.*B = 0 & 1 at the same time. ;^)
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
it just needs a little feedback.
Y = B or ( T and Y )
lots of people missed the word "cycle" I took the list to represent the steps in a repeating cycle.
I don't think any instructor would word a problem like that so it's probably not homework.
Yep, Called a Set/Reset Flop, as I posted two days ago...
Message-ID:
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Stormy on the East Coast today... due to Bush\'s failed policies.
It's solved as a Set/Reset flop...
0,0 Resets
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Buy a Fiarysler with your tax credit...
Ignore that grinding noise, that is normal :-)
That seems a reasonable interpretation, but in that case there's insufficient data to make any useful comments. Is it a state machine? Is it clocked? What is supposed to happen if the T & B inputs are both high? What's the power up state?
--
W
. | ,. w , "Some people are alive only because
\\|/ \\|/ it is illegal to kill them." Perna condita delenda est
---^----^---------------------------------------------------------------
Everybody's missed the point that OP is a googlie.
We'll never hear from him/her again.
Cheers! Rich
Is=20
Is=20
yes. no. Y becomes 1. undefined.
Sorry about forgetting the content with the previous post.
I posted a solution...
Newsgroups: sci.electronics.design Subject: Re: help me Date: Thu, 07 May 2009 07:54:14 -0700 Message-ID:
and white-listed the OP.
Never saw any response. So I'd guess it was homework, and the two days I took to get around to playing with it for a few minutes was beyond his deadline ;-)
...Jim Thompson
--
| James E.Thompson, P.E. | mens |
| Analog Innovations, Inc. | et |
| Analog/Mixed-Signal ASIC\'s and Discrete Systems | manus |
| Phoenix, Arizona 85048 Skype: Contacts Only | |
| Voice:(480)460-2350 Fax: Available upon request | Brass Rat |
| E-mail Icon at http://www.analog-innovations.com | 1962 |
Stormy on the East Coast today... due to Bush\'s failed policies.
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