Observation of SFQ pulse using HTS sampler

Maruyama, Michitaka; Wakana, H.; Hato, Tsunehiro; Suzuki, Hideo; Tanabe, K.; Uekusa, K.; Konno, T.; Sato, Nobuya; Kawabata, M.

doi:10.1016/j.physc.2007.05.047

Cited by 2 publications

(1 citation statement)

References 16 publications

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“…The spread in the critical current for one hundred junctions is smaller than 10% (Satoh et al, 2001) while the I C R N product is larger than 1 mV at 40 K (Morimoto et al, 2006). A variety of elementary SFQ circuits such as a toggle flip-flop, switches and an analog-to-digital converter have been designed for operation temperatures of 30 to 50 K, while a prototype on-chip sampler system is being developed by Maruyama et al (2007) for demonstration of bandwidth over 100 GHz for optical input signals, Fig. A variety of elementary SFQ circuits such as a toggle flip-flop, switches and an analog-to-digital converter have been designed for operation temperatures of 30 to 50 K, while a prototype on-chip sampler system is being developed by Maruyama et al (2007) for demonstration of bandwidth over 100 GHz for optical input signals, Fig.…”

Section: Selected Applications Of Artificial Barrier Junctionsmentioning

confidence: 99%

High-T c Josephson junctions

Seidel

2011

High-Temperature Superconductors

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Section: Selected Applications Of Artificial Barrier Junctionsmentioning

confidence: 99%

High-T c Josephson junctions

Seidel

2011

High-Temperature Superconductors

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Quantized Pulse Propagation in Josephson Junction Arrays

Donnelly

Brevik

Flowers-Jacobs

et al. 2020

IEEE Trans. Appl. Supercond.

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We present time-domain electrical measurements and simulations of the quantized voltage pulses that are generated from series-connected Josephson junction (JJ) arrays. The transmission delay of the JJ array can lead to a broadening of the net output pulse, depending on the direction of the output pulse propagation relative to the input bias pulse. To demonstrate this, we compare time-domain measurements of output pulses from radio-frequency Josephson Arbitrary Waveform Synthesizer (RF-JAWS) circuits fabricated with two different output measurement configurations, so that the backward-propagating and forward-propagating pulses can be measured. Measurements were made on arrays with 1200 and 3600 JJs and show that the net backward-propagating output pulse is broadened by timing delays in the JJ array while the net forward-propagating output pulse is insensitive to delay effects and can theoretically be further scaled to longer JJ array lengths without significant output pulse broadening. These measurements match well with simulations and confirm the expectation that the net output pulses arise from the time-delayed superposition of individual JJ output pulses from the series array of JJs. The measurements and analysis shown here have important implications for the realization of RF-JAWS circuits to be used as quantum-based reference sources for communications metrology.

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Observation of SFQ pulse using HTS sampler

Cited by 2 publications

References 16 publications

High-T c Josephson junctions

High-T c Josephson junctions

Quantized Pulse Propagation in Josephson Junction Arrays

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