Yamaha Drum Trigger Module Dtx502 A guitar pickup is actually similar to a dynamic mike coil. For decades, energetic microphones have been wired with the style coil attached to the principal of the microphone's transformer, and perhaps not recommended to ground (‘floating'). The microphone's situation is normally linked to the wire shield, that is connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and large, active microphones are very quiet units as a result of the mixture of transformer isolation and healthy, hanging sign lines throughout, as well as shielded, humbucking coils.
So why not guitars? Instruments are notoriously overwhelmed by noise. Humbucking pickups are merely an incomplete (though essential!) solution. The most obvious answer would be to move the guitar pickup to a balanced production, as being a microphone. An identical thought was published this 2001 patent software like this Yamaha Drum Trigger Module Dtx502?