Method and apparatus for extending the dynamic range of DC-squid

Details Method and apparatus for extending the dynamic range of DC-squid Method and apparatus for extending the dynamic range of DC-squid

1994-03-08

1995-11-21

Snow, Walter E.

Electricity: measuring and testing

Magnetic

Magnetometers

327527, 505846, G01R 33035

Patent

active

054690579

ABSTRACT:
A SQUID system provides for tracking small input signals to a SQUID. A digital flux tracking loop provides for independently providing orthogonal error signal for signal and modulation feedback errors effective to form a flux tracking loop with the SQUID. A current source biases the SQUID with a current effective to cause the SQUID to output a periodic junction voltage V.sub.j having a period .PHI..sub.o, the V.sub.j having an amplitude as a function of magnetic flux .PHI. within the SQUID. A first processor modulates the magnetic flux within the SQUID to output at least three junction voltages. A second processor combines the at least three junction voltages and outputs first and second signals functionally related to flux tracking errors arising from the signal and modulation lock errors, respectively, the first and second signals forming feedback signals effective to form a flux tracking loop with the SQUID. In one embodiment, the signal flux errors are integrated to output a digital signal functionally related to the input signal to the SQUID.

REFERENCES:
patent: 4672359 (1987-06-01), Silver
patent: 4977402 (1990-12-01), Ko
patent: 5045788 (1991-09-01), Hayashi et al.
patent: 5122744 (1992-06-01), Koch
patent: 5291135 (1994-03-01), Hotta et al.

Affiliated with

Also associated with

Rating

Method and apparatus for extending the dynamic range of DC-squid does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Method and apparatus for extending the dynamic range of DC-squid, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Method and apparatus for extending the dynamic range of DC-squid will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-1139920