Roland Jp 08 A best guitar pickup is essentially just like a powerful mike coil. For many years, energetic microphones have now been wired with the style coil attached to the primary of the microphone's transformer, and maybe not called to surface (‘floating'). The microphone's situation is normally connected to the wire guard, that will be connected to the microphone amplifier's ground (see Rane's site for more discussion).
By and big, vibrant microphones are very calm products consequently of the mixture of transformer solitude and balanced, suspended transmission lines during, along with protected, humbucking coils.
So why not instruments? Instruments are notoriously plagued by noise. Humbucking pickups are only a partial (though essential!) solution. The obvious solution is always to float your guitar collection to a healthy productivity, being a microphone. The same thought was published that 2001 patent application such as Roland Jp 08?