Superconducting packet switch

Self Cite

The paper introduces a prototype model of a superconducting packet switch which is composed of an input buffer, a contention solver, and a distribution network. The input buffer and the contention solver enable contention-free distribution of data packets. The total design of the prototype has been completed and the total operation has been numerically simulated and confirmed.A 2 2 2 switching element which controls the paths of two packets is the key component of the prototype. The basic switching element with 1-b data-width is fabricated by standard Nb trilayer process. Three-junction SQUID's driven by a three-phase powering clock are used in the switch. The correct operation up to 3.5 GHz, limited by the measurement setup, is confirmed. The margin evaluation shows there remains enough margin at GHz operations.

Section: Prototype Superconducting Packet Switchmentioning

confidence: 98%

“…However, it is said that this approach will be limited in the near future because of the problems of packaging or power dissipation of huge numbers of semiconductor large scale integrators (LSI's) [4]. Thus, substitute devices using superconducting or optical technologies are now attracting attention [5]- [7].…”

Section: Introductionmentioning

confidence: 99%

3.5 GHz operation of a superconducting packet switch element

Hosoya

Hioe

Kominami

et al. 1996

Self Cite

“…Once an address bit has been used to route data in a 2x2 element, it is deleted from the data stream. The 2x2 switch can be used to form a network, each column routing on a different address bit (see for example [2]). Since each 2x2 element in this design routes on the bit following S, the deletion of address bit allows for the use of only one design for all of the 2x2 switch elements in a network.…”

Section: C 2x2 Switch Circuit Descriptionmentioning

confidence: 99%

Single flux quantum circuits for 2.5 Gbps data switching

Worsham

Miklich

Miller

et al. 1997

“…However, it is said that semiconductor switches cannot cope with this demand because of increasing difficulties in packaging and power dissipation of LSI chips. Thus, novel switches using superconducting or optical technologies are now attracting attention [3]- [11].…”

Section: Introductionmentioning

confidence: 99%

“…By using these merits, a superconducting packet switch with very high throughput and low latency can be realized. In order to study the feasibility of superconducting packet switches, a prototype switch has been designed [12]. It is a nonblocking and self-routing switch and has a Batcher-Banyan architecture with input buffers.…”

Section: Introductionmentioning

confidence: 99%

A 4 X 4 superconducting Batcher-Banyan switch

Hosoya

Kominami²

1997

Self Cite

The paper describes a Batcher sorter and a Banyan network which together form a nonblocking and self-routing switch. The Batcher sorter sorts input packets in the order of their address values. This sorting operation guarantees no blocking in the succeeding Banyan network and presents an efficient way to check contention. The Banyan network distributes contention-free packets to their final destinations. The Batcher and Banyan switches were designed by using a three-junction SQUID gate family driven by three-phase powering clocks.The Batcher sorter is composed of 2 2 2 Batcher switching elements. Each Batcher switching element sorts two input packets in the order of their address values. A 4 2 4 Batcher sorter with 2-b data width, which is composed of six 2 2 2 Batcher switching elements, was fabricated by an Nb tri-layer process. Its correct operation was confirmed.The Banyan network consists of 2 2 2 Banyan switching elements. A 2 2 2 Banyan switching element with 2-b data width was also fabricated. The correct operation was confirmed up to 4 GHz by using a test pattern generator integrated on-chip.