Tech 21 Landmark 300 A best guitar pickup is essentially much like a vibrant microphone coil. For many years, powerful microphones have now been sent with the voice coil mounted on the principal of the microphone's transformer, and perhaps not introduced to floor (‘floating'). The microphone's event is typically connected to the wire guard, that is attached to the microphone amplifier's ground (see Rane's site for more discussion).
By and large, active microphones are very calm devices consequently of the mixture of transformer isolation and healthy, suspended indication lines during, as well as protected, humbucking coils.
Therefore why not guitars? Instruments are once affected by noise. Humbucking pickups are only an incomplete (though crucial!) solution. The most obvious solution would be to move the guitar pickup to a healthy output, just like a microphone. An identical idea was printed this 2001 patent application like this Tech 21 Landmark 300?