A 2.6mW 370MHz-to-2.5GHz open-loop quadrature clock generator
Kyu-Hyoun Kim, Paul W. Coteus, et al.
ISSCC 2008
We have introduced a new class of dc-powered Single Flux Quantum (SFQ) logic that uses dynamic (self-resetting) internal states to achieve completely clock-free gate operation and provide high immunity to input data skew. We call it DSFQ (dynamic SFQ) logic. We have successfully designed and tested a 2-input DSFQ and gate and showed its ability to hold dynamically its internal states for over 25 ps while operating at 10 GHz clock frequency. We also demonstrated picosecond-scale dynamics of DSFQ circuit with an on-chip Josephson sampler, with only low-speed interfaces required.
Kyu-Hyoun Kim, Paul W. Coteus, et al.
ISSCC 2008
John F. Bulzacchelli, Mounir Meghelli, et al.
IEEE Journal of Solid-State Circuits
Kyu-Hyoun Kim, Daniel M. Dreps, et al.
ISSCC 2009
Timothy O. Dickson, Yong Liu, et al.
VLSI Circuits 2011