Behringer Uca 202 A electric guitar collection is actually much like a dynamic mike coil. For many years, dynamic microphones have been wired with the voice coil mounted on the principal of the microphone's transformer, and perhaps not referenced to ground (‘floating'). The microphone's case is typically linked to the cable shield, that will be connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, active microphones are very quiet devices as a result of the mixture of transformer isolation and balanced, hanging sign lines through the duration of, along with guarded, humbucking coils.
So why don't you instruments? Instruments are notoriously plagued by noise. Humbucking pickups are merely a partial (though essential!) solution. The most obvious alternative is to move your guitar pickup to a healthy productivity, just like a microphone. An identical thought was published this 2001 patent application like this Behringer Uca 202?