- #1
MissP.25_5
- 331
- 0
Hello,
I am in need of big help here. I don't know what else should be done to get this correct.
I have to build this PLL circuit and choose any 3 N (integer) of the N-divider. Then I have to observe the input signal Sig_in and the output signal VCut for each N. The result should be that the output frequency is N+1 times bigger than that of the frequency set by ELVIS (function generator), if I have understood the instructions correctly. I attached my results. The output signal looks weird, right? When I set N as 1, the output signal gets messed up :/ I tried for N= 4 and 8, the waveform looked just the same as when N=1. What should I do? By the way, where should I connect the 5th pin of IC 85 (A=B) to? In the diagram it just shows a short line not connecting to anything.
I took 4 pictures of different angles so you can see better. Click on the flickr links to see the pictures of my circuit.
NOTE: THE DIAGRAM IS IN THE PDF FILE PAGE 2.
http://www.flickr.com/photos/98820721@N04/11870437296/sizes/o/in/photostream/
http://www.flickr.com/photos/98820721@N04/11870033074/sizes/h/in/photostream/
http://www.flickr.com/photos/98820721@N04/11870445586/sizes/k/in/photostream/
http://www.flickr.com/photos/98820721@N04/11869882813/sizes/k/in/photostream/
I am in need of big help here. I don't know what else should be done to get this correct.
I have to build this PLL circuit and choose any 3 N (integer) of the N-divider. Then I have to observe the input signal Sig_in and the output signal VCut for each N. The result should be that the output frequency is N+1 times bigger than that of the frequency set by ELVIS (function generator), if I have understood the instructions correctly. I attached my results. The output signal looks weird, right? When I set N as 1, the output signal gets messed up :/ I tried for N= 4 and 8, the waveform looked just the same as when N=1. What should I do? By the way, where should I connect the 5th pin of IC 85 (A=B) to? In the diagram it just shows a short line not connecting to anything.
I took 4 pictures of different angles so you can see better. Click on the flickr links to see the pictures of my circuit.
NOTE: THE DIAGRAM IS IN THE PDF FILE PAGE 2.
http://www.flickr.com/photos/98820721@N04/11870437296/sizes/o/in/photostream/
http://www.flickr.com/photos/98820721@N04/11870033074/sizes/h/in/photostream/
http://www.flickr.com/photos/98820721@N04/11870445586/sizes/k/in/photostream/
http://www.flickr.com/photos/98820721@N04/11869882813/sizes/k/in/photostream/
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