Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Log inSign up
Challenges
Datasets
Workspaces
Papers
Discussions
Leaderboard
Blog
Job Board
Q3AS

© 2026 Aqora Quantum S.A.S.

TermsPrivacyLegal Notice

Physica C Superconductivity

RSFQ interface circuit for the high-frequency signal output

Yoshinobu Tarutani, Kazuo Saitoh, Kazumasa Takagi

Published Aug 1, 2001• 1 citation
Publisher
DOI
10.1016/s0921-4534(01)00541-x

Related papers

Input and output interfaces between RSFQ and semiconductor circuits

R. Koch, W. Jutzi

Physica C Superconductivity•Nov 1, 1999•2 citations

Engineering issues in high-frequency RSFQ circuits

T. Van Duzer, L Zheng, Xiangchao Meng +6 more

Physica C Superconductivity•Aug 1, 2002•16 citations

Josephson output interfaces for RSFQ circuits

Oleg A. Mukhanov, Sergey V. Rylov, Dmitri V. Gaidarenko +2 more

We have developed and demonstrated high bandwidth Josephson circuits to interface the output of RSFQ circuits to room temperature electronics. Asynchronous dc powered voltage driver circuits have been designed to amplify RSFQ signal levels to voltage outputs in the 2-4 mV range, in a wide bandwidth. These driver circuits have been characterized and tested for data rates up to 8 Gb/s. The bit error rate for one of these drivers has been measured up to 7 Gb/s for a (2/sup 31/-1) bit long pseudo-random bit sequence (PRBS). In order to match the data rate of Josephson circuits to slower room temperature electronics, we have developed clock-controlled shift registers which allow shift-in and shift-out of data at different frequencies. Complete functionality of these circuits integrated with the drivers has been demonstrated at low speed. Shift registers integrated with the voltage driver circuits have been tested at high-speed for data rates up to 6 Gb/s.

IEEE Transactions on Applied Superconductivity•Jun 1, 1997•85 citations

Design and Demonstration of Interface Circuits Between Rapid Single-Flux-Quantum and Adiabatic Quantum-Flux-Parametron Circuits

Fumihiro China, Tatsuya Narama, Naoki Takeuchi +3 more

We investigated interface circuits between rapid single-flux-quantum (RSFQ) circuits and adiabatic quantum-flux-parametron (AQFP) circuits for a high-speed and low-power hybrid computing system. In addition, the interface circuits allow us to use long-distance interconnections based on single-flux-quantum (SFQ) passive transmission lines between AQFP gates. The target frequency of interface circuits is several gigahertz. There are two types of interface circuits. The RSFQ/AQFP interface circuit, which transmits a signal from RSFQ circuits to AQFP gates, was realized by coupling an RSFQ toggle flip-flop (TFF) to an AQFP buffer gate. The simulated bias margins of the RSFQ TFF and the excitation current margin of the RSFQ/AQFP interface were 2.22 mA ± 24.7% and 1.71 mA ± 25.0%, respectively. The AQFP/RSFQ interface circuit, which transmits a signal from AQFP gates to RSFQ circuits, was designed by using a high-sensitive magnetically coupled dc/SFQ converter (MC-dc/SFQ) to detect an output current of an AQFP buffer gate. The simulated bias margins of the MC-dc/SFQ and the excitation current margin of the AQFP/RSFQ interface were 0.558 mA ± 20.5% and 1.95 mA ± 36.1%, respectively. We also fabricated and measured the interface circuits.

IEEE Transactions on Applied Superconductivity•Jun 7, 2016•18 citations

osephson Output Interfaces for RSPQ Circuits

Anuarbek Mukhanov, Sergey V. Rylov, Dmitri V. Gaidarenko +2 more

We have developed and demonstrated high bandwidth Josephson circuits to interface the output of RsFQ circuits to room temperature electronics. Asynchronous dc powered voltage driver circuits have been designed to amplify RSFQ signal levels to voltage outputs in the 2-4 mV range, in a wide bandwidth. These driver circuits have been characterized and tested for data rates up to 8 Gb/s. The bit error rate for one of these drivers has been measured up to 7 Gbls for a (Z3l -1) bit long pseudo-random bit sequence (PPRBS). In order to match the data rate of Josephson circuits to slower room temperature electronics, we have developed clock-controlled shift registers which allow shift-in and shift-out of data at different frequencies. Complete functionality of these circuits integrated with the drivers has been demonstrated at low speed. Shift registers integrated with the voltage driver circuits have been tested at high-speed for data rates up to 6 Gb/s.

•Jan 1, 1997•0 citations

Operation of RSFQ circuits with microwave signal injection

Romain Collot, Pascal Febvre, Thierry Robert +3 more

•Sep 15, 2013•0 citations
We have developed and demonstrated high bandwidth Josephson circuits to interface the output of RSFQ circuits to room temperature electronics. Asynchronous dc powered voltage driver circuits have been designed to amplify RSFQ signal levels to voltage outputs in the 2-4 mV range, in a wide bandwidth. These driver circuits have been characterized and tested for data rates up to 8 Gb/s. The bit error rate for one of these drivers has been measured up to 7 Gb/s for a (2/sup 31/-1) bit long pseudo-random bit sequence (PRBS). In order to match the data rate of Josephson circuits to slower room temperature electronics, we have developed clock-controlled shift registers which allow shift-in and shift-out of data at different frequencies. Complete functionality of these circuits integrated with the drivers has been demonstrated at low speed. Shift registers integrated with the voltage driver circuits have been tested at high-speed for data rates up to 6 Gb/s.
We investigated interface circuits between rapid single-flux-quantum (RSFQ) circuits and adiabatic quantum-flux-parametron (AQFP) circuits for a high-speed and low-power hybrid computing system. In addition, the interface circuits allow us to use long-distance interconnections based on single-flux-quantum (SFQ) passive transmission lines between AQFP gates. The target frequency of interface circuits is several gigahertz. There are two types of interface circuits. The RSFQ/AQFP interface circuit, which transmits a signal from RSFQ circuits to AQFP gates, was realized by coupling an RSFQ toggle flip-flop (TFF) to an AQFP buffer gate. The simulated bias margins of the RSFQ TFF and the excitation current margin of the RSFQ/AQFP interface were 2.22 mA ± 24.7% and 1.71 mA ± 25.0%, respectively. The AQFP/RSFQ interface circuit, which transmits a signal from AQFP gates to RSFQ circuits, was designed by using a high-sensitive magnetically coupled dc/SFQ converter (MC-dc/SFQ) to detect an output current of an AQFP buffer gate. The simulated bias margins of the MC-dc/SFQ and the excitation current margin of the AQFP/RSFQ interface were 0.558 mA ± 20.5% and 1.95 mA ± 36.1%, respectively. We also fabricated and measured the interface circuits.
We have developed and demonstrated high bandwidth Josephson circuits to interface the output of RsFQ circuits to room temperature electronics. Asynchronous dc powered voltage driver circuits have been designed to amplify RSFQ signal levels to voltage outputs in the 2-4 mV range, in a wide bandwidth. These driver circuits have been characterized and tested for data rates up to 8 Gb/s. The bit error rate for one of these drivers has been measured up to 7 Gbls for a (Z3l -1) bit long pseudo-random bit sequence (PPRBS). In order to match the data rate of Josephson circuits to slower room temperature electronics, we have developed clock-controlled shift registers which allow shift-in and shift-out of data at different frequencies. Complete functionality of these circuits integrated with the drivers has been demonstrated at low speed. Shift registers integrated with the voltage driver circuits have been tested at high-speed for data rates up to 6 Gb/s.