Elec 2607 Digital Switching Circuits Lecture 15 & 16: Digital Logic 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 0:
ANOTHER FORM OF Digital Logic 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
Review the SR Latch in lectures 7 & 8 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
For review see lectures 9 & 10 12/11/2018 ELEC 2607 Lecture 15 & 16:
It is the output from the logic gates 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
IS this circuit useful for anything? What is this circuit? What is this circuit? The point of this slide is where to put the breaks AND NOT the circuits used to illustrate where the breaks should be placed. 12/11/2018 ELEC 2607 Lecture 15 & 16:
Just like for synchronous FSM 12/11/2018 ELEC 2607 Lecture 15 & 16:
a+ and b+ will show up on the left side of the X They will then propagate through the X restoring or changing A, B Think of it as a two step process Feedback to get + Jumping the X This again Stability 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
AB Two or more signal race around the feedback loop. The fast signals arrive first. 12/11/2018 ELEC 2607 Lecture 15 & 16:
Have same time delay as For this slide Gates #1 and #2 Gates #3 and #4 12/11/2018 ELEC 2607 Lecture 15 & 16:
Return to this starting condition Change s to 1 #1 #2 Gates #1 and #2 Are faster than Gates #3 and #4 AB #4 #3 12/11/2018 ELEC 2607 Lecture 15 & 16:
Are faster than For this slide Gates #1 and #2 New 1 Gates #3 and #4 AB AB Old 0 12/11/2018 ELEC 2607 Lecture 15 & 16:
Return to this starting condition Change s to 1 #1 #2 Gates #1 and #2 Are slower than Gates #3 and #4 AB #4 #3 12/11/2018 ELEC 2607 Lecture 15 & 16:
Are slower than For this slide New 1 Old 0 Gates #1 and #2 AB AB 12/11/2018 ELEC 2607 Lecture 15 & 16:
A GOOD PLACE TO TAKE A BREAK key Two bit change Gives race condition A GOOD PLACE TO START AGAIN 12/11/2018 ELEC 2607 Lecture 15 & 16:
What about 3 bit changes or 4 bit changes or …… ????? 12/11/2018 ELEC 2607 Lecture 15 & 16:
1 Next slide 2 Next - Next slide 12/11/2018 ELEC 2607 Lecture 15 & 16:
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12/11/2018 ELEC 2607 Lecture 15 & 16:
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011 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
Breaking up the next 2 slides into individuals It is clearer if we make one slide for each step in the process. Will be added in next revision. Now added 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
(4) 12/11/2018 ELEC 2607 Lecture 15 & 16:
Last 4 slides together -----------Summary 12/11/2018 ELEC 2607 Lecture 15 & 16:
(5) Sketch transitions on a state diagram (5) Sketch transitions on a state diagram. Try to make transitions horizontal or vertical. (5) 12/11/2018 ELEC 2607 Lecture 15 & 16:
(6) Get rid of angle jumps 12/11/2018 ELEC 2607 Lecture 15 & 16:
(7) 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
Last 4 slides together -----------Summary 12/11/2018 ELEC 2607 Lecture 15 & 16:
finale -----------Summary 12/11/2018 ELEC 2607 Lecture 15 & 16:
Recall lectures 13 & 14 on hazards 12/11/2018 ELEC 2607 Lecture 15 & 16:
Q 12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
12/11/2018 ELEC 2607 Lecture 15 & 16:
Google home page on November 2, 2015 12/11/2018 ELEC 2607 Lecture 15 & 16: