Effective shield structure for improving substrate isolation of analog circuits from noisy digital circuits on a system-on-chip (SOC)

摘要

An integrated circuit (IC) is disclosed to include a central area of the IC that is partitioned into a first section containing at least one digital circuit and a second section containing at least one analog circuit; and a guard strip (or shield) that is within the central area and that is positioned within between the digital circuit and the analog circuit. The shield or guard strip comprises of n-well and p-tap regions that separate digital and analog circuits.