H - Electricity – 03 – K
Patent
H - Electricity
03
K
328/115
H03K 19/195 (2006.01) H01L 39/22 (2006.01)
Patent
CA 1044768
QUANTUM INTERFERENCE JOSEPHSON LOGIC DEVICES Abstract of the Disclosure A quantum interference Josephson junction logic device is disclosed which comprises three or more junctions connected in parallel which are capable of carrying Josephson current and includes means integral with at least one of the junctions for carrying a larger maximum Josephson current than the remaining junctions. The spacing between the lobes of the thres- hold curve is increased over that of a two junction interferometer result- ing in an increased operating region in which logic circuits switch to the voltage state. Good current gain with large lobe separation may be obtained if the two outer junctions having a zero field threshold current, I0, are connected via an inductance, L, to the center junction with a maximum Josephson current, 210. Apart from the gain enhancement due to increased current in at least one of the junctions and that due to the combination of increased current in at least one of the junctions and the symmetrical dual feed, increased gain and operating range can be achieved using the symmetrical dual feed in combination with interferometer arrangements where the maximum Josephson current in all the junctions thereof is the same.
254966
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