High data rate switch with amplifier chip

Sandell, R.; Spargo, J.W.; Leung, M.; Whiteley, S.R.

doi:10.1109/77.783656

Cited by 17 publications

(6 citation statements)

References 3 publications

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“…123 A 2node SFQ crossbar switch has been demonstrated with both data streams over 16 Gb/s at Northrop Grumman, while a 16x16 design was demonstrated at 3 Gb/s by TRW. 135 The ATP program discussed in section 4.4.2 is another good example. Unlike purely optical switching fabrics, RSFQ data switches can be rapidly reconfigured.…”

Section: Network Switchesmentioning

confidence: 99%

RSFQ Technology: Circuits and Systems

Brock

2001

Int. J. Hi. Spe. Ele. Syst.

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Rapid Single-Flux-Quantum (RSFQ) logic is a superconductor IC technology that, with only a modest number of researchers worldwide, has produced some of the world's highest performance digital and mixed-signal circuits. This achievement is due, in part, to a constellation of characteristics that manifest themselves at the circuit level -namely, highspeed digital logic at low-power, ideal interconnects, quantum accuracy, scalability, and simplicity of fabrication. A necessary key to translating these advantages to the systemlevel involves understanding the I/O, synchronization, and packaging issues associated with a cryogenic technology. The objective of this paper is to review the status of current RSFQ circuit-level infrastructure components and their potential impact on system-level applications.

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Section: Network Switchesmentioning

confidence: 99%

RSFQ Technology: Circuits and Systems

Brock

2001

Int. J. Hi. Spe. Ele. Syst.

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“…Developing interface technologies to connect SFQ and semiconductor systems is the key to building practical SFQ systems. There have been several investigations of two types of interfaces: interfaces using nonlatching drivers [1]- [4] and those using latching drivers [5]- [10]. The nonlatching driver has experimentally demonstrated 10-Gb/s operation, but the output voltage was too low (1.2 mV) [2].…”

Section: Introductionmentioning

confidence: 98%

“…They also achieved a low BER of 5 10 at 5 GHz [9]. A driver developed by TRW has produced an output of about 7 mV at 6.2 Gb/s [10]. We have also reported a latching driver that can amplify SFQ pulses at 10 GHz [7], [8].…”

Section: Introductionmentioning

confidence: 98%

High-speed demonstration of an output interface driver for single-flux quantum systems

Harada¹,

Yoshida²,

Yokoyama³

2002

IEEE Trans. Appl. Supercond.

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The high-speed operation of a one-channel output interface for a single-flux quantum (SFQ) system has been demonstrated. The interface consisted of a Josephson latching driver, a room-temperature semiconductor amplifier, and a decision circuit module. The Josephson latching driver was fabricated by using a 2.5-kA/cm 2 standard Nb junction process and used to amplify an SFQ pulse into a 5.5-mV level signal at 10 Gb/s. The interface converted the SFQ pulse signal into a nonreturn-to-zero signal having an amplitude of 1 V at 10 Gb/s.

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“…Many component circuits such as network switches, microprocessors and analog-to-digital converters have been demonstrated. [2][3][4][5][6][7][8][9][10][11][12][13][14][15] However, it is noted that highspeed operation becomes more difficult as the circuit scale increases. One of the main reasons for this is the Josephson transmission lines (JTLs), which are used as interconnects in SFQ circuits.…”

Section: Introductionmentioning

confidence: 99%

Flexible Superconducting Passive Interconnects with 50-Gb/s Signal Transmissions in Single-Flux-Quantum Circuits

Yamada¹,

Ryoki²,

Fujimaki³

et al. 2006

jjap

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We have developed a very flexible wiring technique of passive transmission lines (PTLs) in single-flux-quantum (SFQ) circuits. For high flexibility, we introduced two types of wiring structures of strip lines (SLs) and microstrip lines (MSLs) using the fabrication process which has four metal layers. The SLs and MSLs are realized using the second and fourth metal layers as signal lines, respectively, from the bottom (the other two metal layers are used as ground planes). We also introduced via-holes for transmission between the SL and MSL. For solving the problem of impedance mismatch on complicated discontinuous sections such as joints [between the driver(receiver) and the end of SLs(MSLs)] and via-holes, we optimized the structures of these discontinuous sections and evaluated propagation properties to ensure high-speed transmission of SFQ pulses. We tested the transmission of SFQ pulses through SLs/MSLs including more than 50 via-holes, one of the most complicated lines in actual designs. We confirmed the good propagation properties of SFQ pulses up to 50 Gb/s with sufficiently wide bias margins of ±20% to be used in practical designs.

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High data rate switch with amplifier chip

Cited by 17 publications

References 3 publications

RSFQ Technology: Circuits and Systems

RSFQ Technology: Circuits and Systems

High-speed demonstration of an output interface driver for single-flux quantum systems

Flexible Superconducting Passive Interconnects with 50-Gb/s Signal Transmissions in Single-Flux-Quantum Circuits

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