| ??? 03/11/05 16:53 Read: times |
#89484 - Any filters? Responding to: ???'s previous message |
Mehdi,
your application seems to be a very extended arrengement. But I cannot see any filters! Did you use a solid ground plane? 74HCMOS chips should have a solid ground plane. Connecting too many chips to port can increase capactive load to unsane values. Read datasheet of your micro about what then will happen... I cannot see any decoupling measures in your schematic! Mehdi, it makes absolutely NO SENSE if you give us totally insufficient data. Only to show us the clock line of HC374 because there this pulse can be observed is not enough! Why don't you tell us what clock frequency you use?? Why don't you tell us, what comes behind the HC374?? How shall we estimate where any pulse could come from??????? Kai |
| Topic | Author | Date |
| Unwanted pulse!!!! | 01/01/70 00:00 | |
| noise ! | 01/01/70 00:00 | |
| more noise | 01/01/70 00:00 | |
| Pictures | 01/01/70 00:00 | |
| Pictures:again! | 01/01/70 00:00 | |
| Mehdi here's how | 01/01/70 00:00 | |
| Thanks | 01/01/70 00:00 | |
| re picture, re problem | 01/01/70 00:00 | |
| re:re | 01/01/70 00:00 | |
| relevant - irrelavant | 01/01/70 00:00 | |
| re:re | 01/01/70 00:00 | |
| what source code | 01/01/70 00:00 | |
| Re: | 01/01/70 00:00 | |
| questions | 01/01/70 00:00 | |
| Re:questions | 01/01/70 00:00 | |
incomplete answers | 01/01/70 00:00 | |
| Any filters? | 01/01/70 00:00 | |
| Thanks! | 01/01/70 00:00 | |
| Ground plane | 01/01/70 00:00 | |
| re:pictures | 01/01/70 00:00 | |
| how to post pictures | 01/01/70 00:00 | |
| re:pictures/AGAIN | 01/01/70 00:00 | |
| Picture | 01/01/70 00:00 | |
| Not really | 01/01/70 00:00 | |
| Here ?? | 01/01/70 00:00 | |
| Added advantage | 01/01/70 00:00 | |
| re advantage | 01/01/70 00:00 | |
| Still waiting for pictures | 01/01/70 00:00 |