I'm just wondering what's the purpose of the inductor in this microphone biasing schematic?
Could it be that I have very low input signal from the microphone because of missing L1? Bias generator derives it's power from 3.3V LDO. The microphone I use with this is:
Sensitivity:-30dB+/-2dB Frequency Range: 50Hz-20KHz Output Impedance: ≤2.2 kΩ SNR: >58dB Standard Operation Voltage: 4.5V Operation Voltage: 1.0V-10V.DC