Timeline for Decoupling caps, PCB layout
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Jun 7, 2011 at 21:50 | comment | added | Leon Heller | The capacitor has to deal with some very short-lived high-current spikes, so the routing needs to be correct on both counts. | |
| Jun 7, 2011 at 21:18 | history | edited | Leon Heller | CC BY-SA 3.0 | added 105 characters in body |
| Jun 7, 2011 at 21:07 | comment | added | morten | As I understand it, the decoupling caps has two duties. One is as a power reservoir, the other is for noise filtering. The cap looks like a low-pass filter to the input. Only the filtering would be affected by the routing, yes? In the bottom examples, the ground return is on the "opposite" side of the mcu power pin, so filtering is not effective. Does this make sense? | |
| Jun 7, 2011 at 20:54 | history | edited | Leon Heller | CC BY-SA 3.0 | added 78 characters in body |
| Jun 7, 2011 at 20:45 | history | edited | Leon Heller | CC BY-SA 3.0 | added 123 characters in body; added 27 characters in body |
| Jun 7, 2011 at 20:37 | comment | added | Kellenjb | Doesn't really seem to answer his question to me. He said he knows its not the proper practice, but is trying to determine if it is really a big enough deal to change it. | |
| Jun 7, 2011 at 20:10 | history | answered | Leon Heller | CC BY-SA 3.0 |