Design and demonstration of high-functionality logic cells for miniaturization of SFQ switches
| Autor: | Yoshihito Hashimoto, Y. Kameda, S. Yorozu, T. Nakagawa, K. Miyahara |
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| Rok vydání: | 2007 |
| Předmět: |
Standard cell
Josephson effect business.industry Computer science Energy Engineering and Power Technology Condensed Matter Physics Multiplexer Quantum logic Electronic Optical and Magnetic Materials Power consumption Miniaturization Commutation Electrical and Electronic Engineering business Computer hardware Electronic circuit |
| Zdroj: | Physica C: Superconductivity and its Applications. :1076-1079 |
| ISSN: | 0921-4534 |
| DOI: | 10.1016/j.physc.2007.03.479 |
| Popis: | We newly miniaturized single-flux-quantum (SFQ) switch circuits for realizing a large-scale switch. A problem in our conventional design is a large size of circuits, because they consist of combine primitive-function logic cells , such as AND, NOT, and so on. To solve this problem, we investigated an approach that uses high-functionality logic cells . As the first step in such a design approach, we designed a new 2:1 multiplexer (MUX) cell, which is a key component in switches. The main features of the MUX cell include nondestructive operation, timing-free inputs, and compatibility with our standard cell library “CONNECT”. We significantly miniaturized the MUX by 67% in comparison to our conventional MUX circuit, which was implemented by combining primitive-function cells. We also designed a 2 × 2 switch using the MUX cell. In comparison to our conventional 2 × 2 switch, the circuit size, the number of Josephson junctions, and the power consumption were reduced by 27%, 30%, and 38%, respectively. The 2 × 2 switch operated at 40 GHz with a bias margin of ±6%. |
| Databáze: | OpenAIRE |
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