/diy/ - Do It Yourself

Can any analog wizards tell me if having a buffer then an inverting amplifier will give me better or worse results than using an non-inverting amplifier? Resistor values are not final. May need some DC-blocking caps too, and probably a fair bit more voltage gain.

This is my idea of a microphone preamplifier to replace the usual JFET, using a custom capsule with a charged grid on either side, for electric field shielding. This necessitates a bipolar biasing power supply of some sort, so one grid is at +48V and the other at -48V, or something like that. Don't want to go any higher for the electrocution risk. Ultimately the signal will be fed into an ADC, then go via toslink to a S/PDIF-to-USB IC of some sort.