Yamaha Ydp V240 A best guitar pickup is actually just like a vibrant microphone coil. For many years, active microphones have now been sent with the voice coil attached to the principal of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's case is typically connected to the wire shield, which can be attached to the microphone amplifier's surface (see Rane's web site for more discussion).
By and large, vibrant microphones are extremely quiet products as a result of the mix of transformer isolation and balanced, flying indication lines during, in addition to protected, humbucking coils.
So why not instruments? Instruments are notoriously overwhelmed by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The obvious answer would be to move your guitar pickup to a healthy productivity, being a microphone. The same idea was published this 2001 patent application like this Yamaha Ydp V240?