RSFQ Circuitry Using Intrinsic \pi-Phase Shifts

The latching of temporary data is essential in the rapid single flux quantum (RSFQ) electronics family. Its pulse-driven nature requires two or more stable states in almost all cells. Storage loops must be designed to have exactly two stable states for binary data representation. In conventional RSF...

Full description

Saved in:
Bibliographic Details
Published in:IEEE transactions on applied superconductivity 2007-06, Vol.17 (2), p.659-663
Main Authors: Ortlepp, T., Ariando, Mielke, O., Verwijs, C. J. M., Foo, K. F. K., Andreski, A., Rogalla, H., Uhlmann, F. H., Hilgenkamp, H.
Format: Article
Language:English
Subjects:
Applied sciences
Asymmetry
Bias
Bistability
Circuit properties
CMOS technology
Current-voltage characteristics
Design. Technologies. Operation analysis. Testing
Digital circuits
Electric circuits
Electric, optical and optoelectronic circuits
Electronic circuits
Electronics
Exact sciences and technology
Flux
Information technology
Integrated circuits
Josephson junctions
Logic circuits
Magnetic flux
pi -phase shift
Quantum computing
Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices
Superconducting devices
Superconductivity
Symmetry
Voltage
Wave functions
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:The latching of temporary data is essential in the rapid single flux quantum (RSFQ) electronics family. Its pulse-driven nature requires two or more stable states in almost all cells. Storage loops must be designed to have exactly two stable states for binary data representation. In conventional RSFQ such loops are constructed to have two stable states, e.g. by using asymmetric bias currents. This bistability naturally occurs when phase-shifting elements are included in the circuitry, such as π-Josephson junctions or a π-phase shift associated with an unconventional (d-wave) order parameter symmetry. Both approaches can be treated completely analogously, giving the same results. We have demonstrated for the first time the correct operation of a logic circuit, a toggle-flip-flop, using rings with an intrinsic π-phase shift (π-rings) based on hybrid high-T c to low-T c Josephson junctions. Because of their natural bistability these π-rings improve the device symmetry, enhance operation margins and alleviate the need for bias current lines.
ISSN:1051-8223
1558-2515
DOI:10.1109/TASC.2007.898635