HTS SFQ logic circuit built with YBCO grain boundary junctions |
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| Affiliation: | 1. Department of Physics, University of Kashmir, Srinagar 190006, India;2. Materials Science Division, Inter University Accelerator Centre, New Delhi 110067, India;1. School of Chemistry and Chemical Engineering, Queen''s University Belfast, David Keir Building, Stranmillis Road, Belfast, Northern Ireland BT9 5AG, UK;2. Chemistry Department, Faculty of Science, South Valley University, Qena 83523 Egypt;3. South West College, Cookstown, Co., Tyrone, Northern Ireland BT80 8DN, UK;4. School of Mechanical and Aerospace Engineering, Queen''s University Belfast, Belfast, Northern Ireland BT9 5AH, UK;5. Department of Petroleum and Chemical Engineering, College of Engineering, Sultan Qaboos University, Muscat, Oman;6. Chemical Engineering Department, College of Engineering, King Saud University, P.O. Box 800, Riyadh 11421, Saudi Arabia |
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| Abstract: | We have designed, fabricated, and operated an SFQ RS flip–flop based on YBCO grain boundary junctions formed on a SrTiO3 bi-crystal substrate. The circuit consisted of a read SQUID and an RS flip–flop, which were magnetically coupled together. The circuit operated correctly in the temperature range of 65–71 K. Especially, at 71 K, this circuit operated correctly over the 100 reset–set operations without making errors. We also measured the effect of noise on switching a Josephson junction to the voltage state in an SFQ circuit. |
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