Patent ID: 8848394

Claim:
A radio frequency circuit comprising: a substrate; an active circuit in the substrate; adjacent the active circuit and in the substrate, a conductive ring material around at least a portion of the active circuit; at least one insulating layer over the substrate; and in another layer over the substrate, an upper conductive ring material insulated from the conductive ring material by the insulating layer, and configured to generate an inductance that matches input impedance characteristics of the active circuit; wherein the active circuit includes a plurality of transistors including a first input transistor of a low noise amplifier circuit, and the upper conductive ring material is configured in thickness and length to generate an inductance that matches an inductance of the first input transistor, or includes an end electrically connected to the gate of the first input transistor and another end of the upper conductive ring material is an input pin for the gate, the upper conductive ring material being configured to generate an inductance that matches an inductance of the first input transistor.