Behringer Inuke Nu3000 A electric guitar pickup is basically similar to a dynamic microphone coil. For decades, energetic microphones have been wired with the voice coil attached with the primary of the microphone's transformer, and maybe not called to soil (‘floating'). The microphone's situation is typically attached to the wire shield, that is connected to the mike amplifier's floor (see Rane's web site for more discussion).
By and large, active microphones are extremely calm products as a result of the mixture of transformer isolation and balanced, hanging transmission lines during, in addition to guarded, humbucking coils.
Therefore why not guitars? Guitars are once plagued by noise. Humbucking pickups are just a partial (though important!) solution. The most obvious option is to float your guitar collection to a healthy result, being a microphone. The same idea was printed this 2001 patent application like this Behringer Inuke Nu3000?