Digital operation range of a RSFQ toggle flipflop

Benzing, W.; Jutzi, W.

doi:10.1016/s0011-2275(97)00076-3

Cited by 2 publications

(1 citation statement)

References 11 publications

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“…Here, only the maximum frequency with respect to the correct operation as a frequency divider (by a factor of 2) for periodic input pulses was considered. Extended analyses were carried out by Benzing et al [9].…”

Section: E Simulationsmentioning

confidence: 99%

Experimental realization of a 3D integrated RSFQ T-flip-flop using stacktrons

Ruck

Schmitz

Thyssen

et al. 1999

IEEE Trans. Appl. Supercond.

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Superconducting circuits based upon the Rapid Single Flux Quantum (RSFQ) Logic are an interesting approach for future digital electronics with clock frequencies in the range of 100 GHz. Our intention is to increase the integration density of such circuits. Therefore we have successfully fabricated and tested an RSFQ-circuit based on a new kind of stacked three terminal device, henceforth called a "Stacktron". A Stacktron consists of two vertically arranged all-niobium tunnel junctions, each separately shunted by a thin film resistor, and an access to the intermediate niobium layer. An RSFQ frequency divider (TFlip-Flop) including two Stacktrons has been tested up to 20GHz. As a shunt resistor we used Pd/Au, so that p, e 1 and the I-V-curve is nonhysteretic. The junctions showed a current density of approximately 250 A/cmz. The IcR,-product was 100 pV. These first steps toward a three dimensional (3D) RSFQ architecture will be discussed in the framework of highly integrated and complex RSFQ-circuits.

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Section: E Simulationsmentioning

confidence: 99%