Power Supply Amplifier Class D A guitar pickup is actually much like a dynamic microphone coil. For decades, vibrant microphones have already been wired with the voice coil mounted on the principal of the microphone's transformer, and perhaps not called to ground (‘floating'). The microphone's event is typically linked to the wire shield, which will be connected to the mike amplifier's ground (see Rane's website for more discussion).
By and big, dynamic microphones are very quiet units as a result of the mixture of transformer isolation and healthy, suspended sign lines through the duration of, along with guarded, humbucking coils.
Therefore you will want to guitars? Instruments are notoriously plagued by noise. Humbucking pickups are only an incomplete (though essential!) solution. The most obvious option is always to move your guitar collection to a balanced result, just like a microphone. A similar idea was printed this 2001 patent software like this Power Supply Amplifier Class D?