Method of configuring superconducting random access memory, device structure of the same, and superconducting drive circuit
US7505310B2 · kind B2 · utility
Assignee
Inventors
Key dates
| Filing date | Mar 14, 2006 |
| Grant date | Mar 17, 2009 |
| Priority date | — |
| Expiry date | Jan 7, 2027 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG11C11/44
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
In a superconducting random access memory according to this invention, drive lines such as a word line and a bit line, and a sense line for accessing a memory cell array are each divided into a plurality of blocks and an in-block signal propagation circuit having a level-logic drive circuit and sense circuit each with high load drive capability is used for signal propagation in each of the blocks. Further, for long-distance signal propagation between the blocks, superconducting passive transmission lines formed by single flux quantum (SFQ) devices and capable of high-speed operation are used. As a result, the high-speed operation as a whole is enabled. It is possible to additionally use splitters or confluence buffers and latch circuits and, further, a binary tree structure may be adopted.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.