G - Physics – 01 – R
Patent
G - Physics
01
R
324/48
G01R 33/035 (2006.01)
Patent
CA 1181812
DUAL R. F. BIASED SQUID ELECTRONIC CIRCUIT Abstract of the Disclosure The present invention relates to an electronic circuit for determining magnetic field strength using a SQUID. The circuit is comprised of a first and a second radio frequency generator producing signals having frequencies f1 and f2 respectively. An adder is provided to produce a SQUID bias signal having a frequency f1 - f2. A pumping coil is placed in close proximity to the SQUID and is connected to the adder. A tuned circuit is placed in close proximity to the SQUID and is tuned to the difference frequency f1 - f2. A detector is provided, connected to the tuned circuit. The detector counts flux transistions in the SQUID due to changes in magnetic field strength. In addition, the detector produces an analog signal which is proportional to changes in the field strength which are less than a predetermined level which would cause a flux transition.
312435
Burbank Max B.
Fife Alistair A.
Lomnes Randy K.
Macura Vaclav
Retallack L. James
As Represented By The Ministe R. Of National Defence Her Majesty The Queen In Right Of Canada
Kirby Eades Gale Baker
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