01-08-2009 10:00 AM
Hello,
The cd4018 Johnson counter seems to be modeled wrong. It appears to be modeled as a bucket brigade counter rather than a Johnson counter.
For an example of how it is supposed to work, see figure 15 of the data sheet from Texas Instruments.
http://www.icmaster.com/search/Preview.do?v=1
Compare this to the output from the circuit the I simulated in the attached file.
Would it be possible to get an update to the libraries with corrections to the models for the cmos and TTL IC's?
Thanks.
01-08-2009 10:48 AM
After I posted, I found that the link to the data sheet did not work. Here is a link directly from TI for the data sheet for the CD4018 counter.
01-14-2009 03:42 PM
Hi Eric,
I was able to verify the problem and I will ask R&D to look into this problem