Design of novel, robust, ultra-low power, low-voltage analog/mixed-signal IC functional blocks including but not limited to voltage/current references, operational amplifiers, comparators, switched-capacitor circuits (amplifiers, filters, charge pumps, etc.), ADCs and DACs, oscillators, switching power circuits, communication circuits, etc. Active involvement in all aspects of IC design, including the development of functional concepts and specifications, top-level design architecture, design partitioning and block level design, detailed circuit design and simulation, layout floor-planning and transistor level layout, bench verification and testing, test-vector development, and documentation.