Timeline for When to use common-mode and/or differential mode filters?
Current License: CC BY-SA 3.0
7 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Nov 14, 2016 at 3:24 | vote | accept | Andrey Pro | ||
| Oct 25, 2016 at 22:55 | answer | added | Russell McMahon♦ | timeline score: 1 | |
| Oct 25, 2016 at 12:46 | comment | added | Andrey Pro | But that what I am asking: under which conditions either of them are used? Or may be better this way: How would you decide whether you need common-mode and/or differential mode filter? | |
| Oct 25, 2016 at 12:07 | comment | added | Bimpelrekkie | it is not clear to me in which cases should either... That is because there is no general rule for that, you will have to look at your own circuit / system and decide what you need. CMRR in ADCs: look in the datasheet of that ADC if that CMRR is enough, you then also need to know the CM noise level of the signal you're feeding into your ADC. Again, there is no general answer, it depends. You need to do a per-design calculation to determine what is needed. | |
| Oct 25, 2016 at 12:02 | comment | added | Bimpelrekkie | To me it looks like the article suggests that by using the proposed circuits (like figure 4) you can choose to have CM and/or DM filtering. In my opinion such a simple filter always filters DM and optionally filters CM (when using Ccm). You cannot have only CommonMode filtering with such a simple circuit. So if you heavily filter the CM, you will also filter your DM wanted signal ! | |
| Oct 25, 2016 at 11:56 | comment | added | Andy aka | That article covers many things. Specifically what sentence or paragraph is giving you the biggest headache? | |
| Oct 25, 2016 at 11:32 | history | asked | Andrey Pro | CC BY-SA 3.0 |