EEVblog #616 – How Microphone Phantom Powering Works


Doug Ford, former head designer at Rode Microphones explains 48V phantom powering of microphones and how it works.
There is a ton of stuff here:
Electrostatic and electromagnetic noise, differential amplifiers, common mode noise, transformer magnetisation current, JFET differential driver circuits, balanced impedances, phase splitters, miller capacitance and how it matters, and he explains how the Schoeps amplifier topology works.
Forum HERE

About EEVblog

Check Also

EEVblog #1084 – Pocket Multimeter Shootout Part 2

Some quick extra tests on the 6 of the 14 pocket multimeters from Part 1 ...

The EEVblog Store generally ships twice a week, on Tuesdays & Fridays, Sydney time. Dismiss