| ??? 02/21/09 14:09 Modified: 02/21/09 14:29 Read: times |
#162628 - Yes, I did some analysis on it... Responding to: ???'s previous message |
Here:
http://www.8052.com/forum/read/143008 and also here, briefly: http://www.8052.com/forum/read/104727 The problem arises, when both caps in parallel have very low equivalent series resistance and are different. So, you can put two identical caps in parallel, but when they are different, annoying resonances will occur. I came face to face with this issue already in the 80ies, but didn't find anything in literature. Today it's well known and even part of a few datasheets, like the following, for instance: Look at the chapter "bypassing considerations" of http://www.analog.com/static/im.../AD797.pdf Kai |
| Topic | Author | Date |
| Decounpling Capacitor | 01/01/70 00:00 | |
| Absolutely! | 01/01/70 00:00 | |
| Parallel caps - Kai? | 01/01/70 00:00 | |
| Why is this happening? | 01/01/70 00:00 | |
| Why is what happening? | 01/01/70 00:00 | |
| Possibly | 01/01/70 00:00 | |
| Should I put an inductance instead of the capacitor? | 01/01/70 00:00 | |
Start by describing | 01/01/70 00:00 | |
| snubber diode? | 01/01/70 00:00 | |
| Yes, I did some analysis on it... | 01/01/70 00:00 | |
| I'm somewhat skeptical ... | 01/01/70 00:00 |