About the Group

Our research is primarily focused on solving important (and interesting) problems in the design and analysis of integrated systems, with a particular emphasis on energy-efficient design.

Across a wide range of systems, from high-performance servers to energy-scavenging ultra-low power systems, energy dissipation has emerged as a determining factor in performance and design feasibility. Our current goal is to explore minimum energy dissipation limits as we build sophisticated systems in increasingly variable and unreliable process technologies. Applications include high-performance computing, mobile and embedded systems, implantable bio-medical devices, hardware security, and neuro-engineering. Current research focus is on circuit-architecture-system co-design in three main areas:

  • Clocking
  • Supply conversion, distribution and regulation,
  • Ultra low-power sensing, recording, and computation

In the area of clocking, my group seeks to advance the state-of-the-art in digital system clocking technology.  Current work in the area of clock design includes low-voltage all-digital PLLs, circuits and architectures for next-generation clock distribution, and the exploitation of resonance for ultra-wide DVFS systems throughout the entire clock distribution.

In the area of power supply conversion, delivery, and regulation, my group is building upon our previous work in the area of clock-stretching for voltage droop mitigation. Research problems involve all-digital DC-DC converters for digital systems, radical regulation architectures for heterogeneous integrated systems and 3D chipstacks, as well as power converters and regulators in ultra-low power systems for biomedical implants.

We have witnessed the end of Dennard scaling, and continue to see increasing levels of integration in modern designs. Radical gains in performance and efficiency will require the identification, analysis, and exploitation of structure not only across the circuit-architecture-system-application strata, but also across traditionally separated sub-fields. A unique feature of my group is a keen interest and track record in exploiting ideas from diverse fields to provide fresh perspectives and elegant solutions to problems in seemingly unrelated areas. We plan to continue our cross-pollination activities into the future.

Contact: Professor Visvesh Sathe