| ??? 12/07/05 17:21 Read: times |
#104831 - if anyone should be sorry, that would be Responding to: ???'s previous message |
Due to my lack of knowledge i didn't understand it so i have to be sorry.
if anyone should be sorry, that would be me. "tongue in cheek" does not cross language barriers very well. I do try to avoid it, but, stupid me, sometimes I slip. Anyway,I am not good at analog so i wonder if placing the filter at the output would also be good.you said that you don't use any parallel resistor , but Kai says that it is necessary.I am confused ! I think ("professor" Kai will know) that the resistor is needed only in cases where layout and quality of ferrite and capacitor come together to form an undesirable combination. Were I to use a high quality coil instead of the cheap ferrite I guess the resistor would be necessary. As to the placing of the filter at the output, for you who use a preregulator voltage the filter before tapping that does, of course have a purpose. However, why filter what you feed the regulator, I fail to see the purpose. Tbe filter at the output, however, removes the slight ripple produced by the regulator (oh, I use switchers, what ripple does an analog regulator produce???) but to isolate the PS from the circuit is always a good idea in my opinion. Erik |
| Topic | Author | Date |
| Vcc Line Filtering | 01/01/70 00:00 | |
| what are the resistors across the ferrit | 01/01/70 00:00 | |
| Some suggestions | 01/01/70 00:00 | |
| RE : Some suggestions | 01/01/70 00:00 | |
| I still would like to know | 01/01/70 00:00 | |
| LC-filter versus regulator | 01/01/70 00:00 | |
| Excellent | 01/01/70 00:00 | |
| That's really good, i was thinking that | 01/01/70 00:00 | |
| I have never used any such amd never had | 01/01/70 00:00 | |
| Filter position | 01/01/70 00:00 | |
| voltage drop for a ferrite at milliamps | 01/01/70 00:00 | |
| Line regulation | 01/01/70 00:00 | |
| sorry, that was tongue in cheek, of cour | 01/01/70 00:00 | |
| my bad | 01/01/70 00:00 | |
| if anyone should be sorry, that would be | 01/01/70 00:00 | |
| SMD,RC | 01/01/70 00:00 | |
| do you remember the math in a previous p | 01/01/70 00:00 | |
| Voltage Drop | 01/01/70 00:00 | |
| Murata better than others? No... | 01/01/70 00:00 | |
| Paralleling is only a theoretical remedy | 01/01/70 00:00 | |
| my mistakes... | 01/01/70 00:00 | |
| How many filters... | 01/01/70 00:00 | |
Tada! | 01/01/70 00:00 | |
| Exactly | 01/01/70 00:00 | |
| Thanks Kai | 01/01/70 00:00 |