| 摘要 |
1534785 Superconductive arrangements INTERNATIONAL BUSINESS MACHINES CORP 4 June 1976 [30 June 1975] 23291/76 Heading H3X In a superconductive interferometer circuit comprising three or more Josephson junctions connected in parallel with each other and with a load, the limits of gate current I to obtain effective switching control are rendered fess critical, and the gain improved, by setting the phase difference # across the junctions with zero applied field to substantially the same value before switching takes place. In its simplest form the outermost of 3 Josephson junctions J 1 to J3 are supplied with gate current through respective inductors L, while the junction J2 is fed directly and is such as to have a higher (e.g. double) maximum Josephson current I 0 than the other junctions, Fig. 2B (not shown). An improvement is to supply the gate current I g to the 3 junctions through a divided path connected to taps on inductor L, Fig. 3B, each path branch including an inductor L p of value L p = 3L. This arrangement may be formed as an integrated structure and optionally all junctions may have the same maximum I o value. An embodiment is also described using 4 junctions. |
