Patent ID: 7982123

Claim:
An apparatus for a passive electromagnetic pickup for an electronic instrument having metal strings, the apparatus comprising: a first circuit comprising a first coil arranged in series with a second coil; wherein the first circuit is configured to isolate at least two strings of the electronic instrument; and a second circuit comprising a third coil arranged in series with a fourth coil; wherein the second circuit is configured to isolate at least two other strings of the electronic instrument, wherein each of the coils of the first circuit and the second circuit comprise thousands of wraps of wire wound on a bobbin, wherein the bobbins of the first circuit and the bobbins of the second circuit comprise a different number of wraps, wherein a number of wraps for each bobbin of the first circuit is determined from a number of coils that are included within each circuit of the apparatus, wherein a number of wraps for each bobbin of the second circuit is determined from the number of coils that are included within each circuit of the apparatus.