A through hole with an annular groove provided about its periphery is formed in a resin case. First and second electrode layers and a controllably conductive media therebetween are formed over a dielectric layer that has a planar surface and at least one opening. The capability of this system to trade-off noise performance, pulse response, and frequency response flatness in order to provide an optimized response is demonstrated. Other semiconductor die can be mounted on the pads and connected in predetermined circuit arrangements with the GaN die. The system and method may further include receiving a selection request selecting one of the current location field and the previous location field.