Negative mic preamplifier input capacitance

So, every condenser capsule has passive and active capacitance. Long story short passive creates distortion actually higher than that of electronic part of a mic. B&K came up with a way to fight that and patented it. Concept described here, starts on page 2-39 2.4.4 Distortion 

https://www.bksv.com/media/doc/be1447.pdf

The patent.
https://patentimages.storage.googleapis.com/93/1a/76/439038ed9dfef3/WO1994023547A1.pdf

Any thoughts on implementing this to readily available mics? Not to mention uber cool 2.7.2 Electrostatic Actuator

kingkorg said:

Any thoughts on implementing this to readily available mics? Not to mention uber cool 2.7.2 Electrostatic Actuator

Click to expand...

This is very similar to active electrostatic guards in instrumentation. The principle is easy, but the devil is in the details. I've successfully implemented such techniques for long  distance party-line intercom (200-ohm nominal Z over several kilometers of shielded cable).
The opamp in the patent must be a very low noise, very high input impedance type, so  it must be an FET followed by a VLN opamp, probably discrete. Or a fully discrete opamp with an FET front end.
I doubt it could be grafted to an existing circuit. It's a complete redesign of the head amp.
The construction technique would be similar to RF.