The Cyber-Spy.Com Usenet Archive Feeds Directly
From The Open And Publicly Available Newsgroup
This Group And Thousands Of Others Are Available
On Most IS NNTP News Servers On Port 119.
Cyber-Spy.Com Is NOT Responsible For Any Topic,
Opinions Or Content Posted To This Or Any Other
Newsgroup. This Web Archive Of The Newsgroup And
Posts Are For Informational Purposes Only.
From: "Richard Webb"
Subject: Re: Weird logic problem
Date: Thu, 10 Oct 2002 02:36:21 +0100
NNTP-Posting-Date: 10 Oct 2002 01:35:10 GMT
X-Newsreader: Microsoft Outlook Express 5.00.2919.6700
I found that by cutting the PCB tracks and inserting a 120ohm resistor has
solved the problem. The PCB track was quite long so would have had a fair
capacitance, anyway problem solved.
Thanks for the help.
"Sir Charles W. Shults III" wrote in message
> This is often caused by having very high impedance lines without
> termination. Are there series resistors in the logic signals that are not
> to a rail? They are sometimes present in a circuit for debugging or
> troubleshooting purposes.
> What value of decoupling capacitor do you have on each chip? That
> my first thing to check. After that, I would look as pullup or pulldown
> resistors on the inputs to get rid of the spikes.
> Chip Shults
> My robotics, space and CGI web page - http://home.cfl.rr.com/aichip
Go Back To The Cyber-Spy.Com
Usenet Web Archive Index Of
The sci.electronics.design Newsgroup