Piano Digital Yamaha Clavinova A guitar pickup is essentially similar to a powerful microphone coil. For decades, active microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and maybe not called to surface (‘floating'). The microphone's case is normally connected to the cable guard, which can be attached to the mike amplifier's soil (see Rane's site for more discussion).
By and large, active microphones are very quiet units consequently of the combination of transformer isolation and healthy, floating sign lines throughout, along with protected, humbucking coils.
Therefore why not guitars? Guitars are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious solution is always to move the guitar collection to a healthy productivity, being a microphone. An identical thought was published that 2001 patent software like this Piano Digital Yamaha Clavinova?