| Electronics > Beginners |
| Capsule microphone biasing decoupling? |
| (1/2) > >> |
| alexg:
Hi All, not sure if I worded it correctly but basically I am looking for answer perhaps to one of simplest questions: will placing decoupling capacitor (C18 in the circuit below) at the mic biasing circuit help at all to mitigate a bit of a ripple because its powered from switching regulator? Or it makes no difference or even make things worse? |
| RoGeorge:
Maybe, but if you place a resistor or inductance between V33 and the node beteween C18 and the microphone's resistor, then it will certainly help, because it will create a low pass filter for the power noises only. |
| alexg:
I have to double check, is this what you advising? |
| Zero999:
--- Quote from: alexg on May 21, 2018, 02:09:37 pm ---I have to double check, is this what you advising? --- End quote --- That seems reasonable, although C18 may need to be much bigger for it to be effective. |
| Audioguru:
I use the mic's same decoupling for the biasing of the mic preamp like this: |
| Navigation |
| Message Index |
| Next page |