We designed and tested low-power digital gates based on the energy-efficient rapid single flux quantum (ERSFQ) and on the reversible nSQUID logic. The ERSFQ circuit consists of a series of 13 toggle flip-flops (TFFs), where the bias resistors are replaced by inductors which generate no energy dissipation in the static mode, resulting in a power consumption orders of magnitude below that of traditional RSFQ circuits during operation. The ERSFQ circuits were fabricated with HYPRES’ standard 4.5-kA/cm2 process and tested up to 20 GHz. The RF input level was about −25 dBm 50 Ω matched, and the output level was 400 μVpp. The nSQUID ring with “NOT” gates was fabricated with HYPRES’ standard 1-kA/cm2 process. The “0” and “1” input logic signals were realized injecting ±5 mA of current in a superconductive coil, obtaining 6 μVpp of amplitude as output signal. The test was performed at low frequency in order to verify the functionality and the ultralow power consumption.
Lucci, M., Ren, J., Sarwana, S., Ottaviani, I., Cirillo, M., Badoni, D., et al. (2016). Low-Power Digital Gates in ERSFQ and nSQUID Technology. IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 26(3), 1-5 [10.1109/TASC.2016.2535146].
Low-Power Digital Gates in ERSFQ and nSQUID Technology
Lucci M.;Ottaviani I.;Cirillo M.;
2016-04-03
Abstract
We designed and tested low-power digital gates based on the energy-efficient rapid single flux quantum (ERSFQ) and on the reversible nSQUID logic. The ERSFQ circuit consists of a series of 13 toggle flip-flops (TFFs), where the bias resistors are replaced by inductors which generate no energy dissipation in the static mode, resulting in a power consumption orders of magnitude below that of traditional RSFQ circuits during operation. The ERSFQ circuits were fabricated with HYPRES’ standard 4.5-kA/cm2 process and tested up to 20 GHz. The RF input level was about −25 dBm 50 Ω matched, and the output level was 400 μVpp. The nSQUID ring with “NOT” gates was fabricated with HYPRES’ standard 1-kA/cm2 process. The “0” and “1” input logic signals were realized injecting ±5 mA of current in a superconductive coil, obtaining 6 μVpp of amplitude as output signal. The test was performed at low frequency in order to verify the functionality and the ultralow power consumption.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
