Prof. Clark has been awarded over 120 US Patents, has approximately 10 pending, and has co-authored over 130 peer reviewed technical papers and nine book chapters. He has presented invited tutorials at NSREC, CICC, VLSI Symposium and ISLPED.

His research interests are circuits and architectures for low power and high performance VLSI, integrated circuit radiation hardening, and CAD for VLSI.

Prof. Clark has served as a guest editor for the IEEE Journal of Solid-State Circuits, on the editorial board of IEEE Transactions on Circuits and Systems II, and the technical committees for IEEE CICC, IEEE NSREC, and ISLPED.