Patent ID: 8059973

Claim:
A feedback controlling optical receiver assembly, comprising: a reference surface; a capacitor; an optical detector mounted on the capacitor, a top electrode of the capacitor being electrically coupled to a bottom electrode of the optical detector; an amplifier mounted on the reference surface, the amplifier receiving and amplifying an electrical signal produced by the optical detector; and an isolator mounted on the reference surface such that the isolator is interposed between the reference surface and the capacitor, the isolator configured to electrically couple a feedback signal present at a ground of the amplifier to an input of the amplifier independent of the reference surface such that most of the feedback signal is cancelled, wherein the isolator includes: a bottom layer of dielectric material that is affixed to a portion of the reference surface; a metallic top plate, the top plate being electrically coupled both to a ground of the amplifier and to a bottom electrode of the capacitor; and two wires extending from the amplifier to the metallic top plate, the wires being arranged in a non-parallel configuration to prevent mutual coupling.