Title:
【発明の名称】高対称直流SQUIDシステム
Document Type and Number:
Japanese Patent JP2533428
Kind Code:
B2
Abstract:
PCT No. PCT/US91/04275 Sec. 371 Date Jan. 26, 1993 Sec. 102(e) Date Jan. 26, 1993 PCT Filed Jun. 14, 1991 PCT Pub. No. WO92/04638 PCT Pub. Date Mar. 19, 1992.A thin film dc SQUID and its driving electronic circuitry configured with very high symmetry, having a SQUID loop formed with four holes (24, 24, 26, 27) at the respective ends of crossed slits (22, 23). Each of these holes forms a single turn secondary coil for symmetrically arranged pairs of modulation coils and signal coils. The geometrical placement of the modulation coils with respect to the signal coils results in a device which nominally has no mutual inductance between the two groups of coils when the SQUID is biased for normal operation. The external driving circuit (75-85) is configured to preserve the highly balanced nature of the SQUID and forces an equal magnitude of current to flow in all four of the bias leads.
Inventors:
SHIMONZU MAIKERU BII
Application Number:
JP51242491A
Publication Date:
September 11, 1996
Filing Date:
June 14, 1991
Export Citation:
Assignee:
KUONTAMU DEZAIN INC
International Classes:
G01R33/035; H01L39/22; (IPC1-7): H01L39/22; G01R33/035
Attorney, Agent or Firm:
Fukami Hisaro (3 outside)
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