TUNABLE GUARD RING FOR IMPROVED CIRCUIT ISOLATION

摘要

A tunable guard ring for improved circuit isolation is disclosed. In an exemplary embodiment, an apparatus includes a closed loop guard ring (512t) formed on an integrated circuit and magnetically coupled by a selected coupling factor to a first inductor (504t) formed on the integrated circuit. The apparatus also includes a tunable capacitor (520) forming a portion of the closed loop guard ring and configured to reduce magnetic field coupling from the first inductor to a second inductor (508t).