| ??? 08/15/05 02:11 Read: times |
#99393 - Low pass filter Responding to: ???'s previous message |
Kai Klaas
2. Schematic assumes that +3V is clean. If it's not, insert a RC low pass filter of about 100Ohm + 100nF, or so.
Kai[/quote said: I know the formula to calculate a low pass filter and given C=100nf how would I calculate the value of R given your proposed circuit if I wished my cutoff frequency to be 15khz. Because there are other resistors in series with the input I am not sure which resistors would figure in the calculations. I would think only one of the 5.1k resistors would need to be figured into the equation. Thanks James Krushlucki |
| Topic | Author | Date |
| LPC9xx Comparators and Hysterisis | 01/01/70 00:00 | |
| Feedback resistor is not enough | 01/01/70 00:00 | |
| Is this allright | 01/01/70 00:00 | |
| Tested it. | 01/01/70 00:00 | |
| calculations | 01/01/70 00:00 | |
| Re: Calculations. | 01/01/70 00:00 | |
| step down rartio | 01/01/70 00:00 | |
| Values need a change | 01/01/70 00:00 | |
| Please show the analyses | 01/01/70 00:00 | |
| Re: Value Changes. | 01/01/70 00:00 | |
| my doubt is | 01/01/70 00:00 | |
| Answers | 01/01/70 00:00 | |
| 1N914 not Zener. | 01/01/70 00:00 | |
| Silent at many places | 01/01/70 00:00 | |
| Low pass filter | 01/01/70 00:00 | |
| Answer | 01/01/70 00:00 | |
| Zero crossing detection | 01/01/70 00:00 | |
Thanks | 01/01/70 00:00 |