We compare the frequency-versus-power dissipation performance of two energy-recovery CMOS implementations to that of a conventional, supply-voltage-scaled design. The application is a small but complete DSP function. All three designs are based on the same high-level organization and conform to the same I/O specification. SPICE simulations indicate that an energy-recovery design which requires only a small degree of modification to the conventional design offers more than a two-fold reduction in power across a wide range of operating frequencies.
William C. Athas, W.-C. Liu, Lars J. Svensson