A land grid array interposer structure, including an electrically insulating carrier plane, and at least one interposer mounted on a first surface of said carrier plane. The feedback voltage transmitter includes a feedback line, a plurality of switching elements configured to selectively connect the sensor lines to the feedback line, and a feedback control line configured to control selection of the switching elements. Certain of the compounds are 4-primary amino quinolines. Inside the device, a spring acts on the lever to pinch and bind the rope against the openings where the rope passes through the clutch housing. This on chip measurement capability supplies information that permits circuit engineers to design and fabricate on chip inductors to very tight tolerances.