论文信息 - Study of Signal Interface between Single Flux Quantum Circuit and Adiabatic Quantum Flux Parametron

Study of Signal Interface between Single Flux Quantum Circuit and Adiabatic Quantum Flux Parametron

We investigated interface circuits between a single-flux-quantum (SFQ) circuit and an adiabatic quantum-flux-parametron (AQFP) for their hybrid system. The target frequency of interface circuits is several GHz. The interface circuit that transmits a signal from the SFQ circuit to the AQFP gate (SFQ/AQFP) is realized by combining an SFQ toggle flip-flop (TFF) with the AQFP buffer. The bias margin of the SFQ TFF and the excitation current margin of the SFQ/AQFP interface are 2.47 mV ±24.7% and 1.36 mA ±8.82%, respectively. The interface circuit that transmits a signal from the AQFP to the SFQ circuit (AQFP/SFQ) was designed by using a high-sensitive mutually coupled dc/SFQ converter (MC-dc/SFQ) to detect magnetic flux signal output from the AQFP. The bias margin of the high-sensitive MC-dc/SFQ and the excitation current margin of the AQFP/SFQ are 2.88 mV ±13% and 1.6 mA ±18.8%, respectively. These interface circuits also allow us to use long-distance interconnection based on SFQ passive transmission lines between AQFP gates.

[1] Y. Yamanashi,et al. Simulation and Experimental Demonstration of Logic Circuits Using an Ultra-Low-Power Adiabatic Quantum-Flux-Parametron , 2013, IEEE Transactions on Applied Superconductivity.

[2] Naoki Takeuchi,et al. An adiabatic quantum flux parametron as an ultra-low-power logic device , 2013 .

[3] Y. Yamanashi,et al. Margin and Energy Dissipation of Adiabatic Quantum-Flux-Parametron Logic at Finite Temperature , 2013, IEEE Transactions on Applied Superconductivity.

[4] H. Terai,et al. Readout Electronics Using Single-Flux-Quantum Circuit Technology for Superconducting Single-Photon Detector Array , 2009, IEEE Transactions on Applied Superconductivity.

[5] E. S. Fang,et al. A Josephson integrated circuit simulator (JSIM) for superconductive electronics application , 1989 .

[6] H. Terai,et al. Design and Fabrication of All-NbN SFQ Circuits for SSPD Signal Processing , 2013, IEEE Transactions on Applied Superconductivity.

[7] Shuichi Nagasawa,et al. Current status and future prospect of the Nb-based fabrication process for single flux quantum circuits , 2006 .

[8] V. Semenov,et al. RSFQ logic/memory family: a new Josephson-junction technology for sub-terahertz-clock-frequency digital systems , 1991, IEEE Transactions on Applied Superconductivity.

[9] V. Semenov,et al. Transmission of single-flux-quantum pulses along superconducting microstrip lines , 1993, IEEE Transactions on Applied Superconductivity.