Towards broadband communications between RSFQ chips
Stanislav V. Polonsky, D.F. Schneider
We have investigated the applicability of Single Flux Quantum (SFQ) and Multiple Flux Quanta (MFQ) approaches to communications between RSFQ logic/memory chips. SFQ pulses can be transmitted between chips if inductive discontinuity L lies below 3-5 pH. For larger L one can employ MFQ pulses which have the same width as the SFQ pulses, but M times larger amplitude. For example, for L=20 pH, M=4 is sufficient. We have developed an MFQ driver and a receiver capable of transmitting the data in 10-20 Gbps/pin range for the use in simple flip-chip MCM packages based on Si substrates.
IEEE Transactions on Applied Superconductivity•Jun 1, 1997•18 citations