Piano Digital Korg B1sp Wh A electric guitar pickup is actually just like an energetic microphone coil. For many years, active microphones have been wired with the style coil attached with the principal of the microphone's transformer, and maybe not referenced to soil (‘floating'). The microphone's situation is usually linked to the cable guard, which can be connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, active microphones are very calm units as a result of the combination of transformer solitude and healthy, hanging sign lines throughout, as well as protected, humbucking coils.
So why don't you guitars? Instruments are once affected by noise. Humbucking pickups are merely an incomplete (though crucial!) solution. The obvious answer is always to move the guitar pickup to a balanced production, as being a microphone. A similar strategy was published this 2001 patent software like this Piano Digital Korg B1sp Wh?