A 380 ps, 9.5 mW Josephson 4-Kbit RAM operated at a high bit yield

  title={A 380 ps, 9.5 mW Josephson 4-Kbit RAM operated at a high bit yield},
  author={S.. Nagasawa and Yusuke Hashimoto and Hiroo Numata and Shuichi Tahara},
  journal={IEEE Transactions on Applied Superconductivity},
We have developed a Josephson 4-Kbit RAM with improved component circuits and a device structure having two Nb wiring layers. A resistor coupled driver and sense circuit are improved to have wide operating margins. The fabrication process is simplified using bias sputtering, as a result, its reliability is increased. The RAM is composed of approximately 21000 Nb/AlO/sub x//Nb Josephson junctions, Mo resistors, Nb wirings, and SiO/sub 2/ insulators. Experimental results show a minimum access… CONTINUE READING
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