Circuit device for driving a squid magnetometric sensor and eval

Details Circuit device for driving a squid magnetometric sensor and eval Circuit device for driving a squid magnetometric sensor and eval

1997-10-17

1999-09-28

Strecker, Gerard

Superconductor technology: apparatus, material, process

High temperature devices, systems, apparatus, com- ponents,...

Measuring or testing system or device

324235, 324248, 505846, G01R 33035, G01R 3500

Patent

active

059588411

ABSTRACT:
A circuit device for driving a SQUID magnetometric sensor. This device includes an FLL magnetometer circuit for driving the SQUID with an AC signal as a magnetometric sensor, an evaluator circuit for evaluating the SQUID characteristics, and a selector circuit for selecting a sensor function or an evaluator function. When the selection circuit selects one of the sensor and evaluator functions, only one of magnetometer and evaluator circuits is activated. Therefore, the circuit device can act alternatively as either a sensor or an evaluator.

REFERENCES:
patent: 4004217 (1977-01-01), Giffard
patent: 4389612 (1983-06-01), Simmonds et al.
patent: 5231353 (1993-07-01), Nakayama et al.
patent: 5280242 (1994-01-01), Odawara et al.
Forgacs et al., "Lock-On Magnetometer Utilizing a Superconducting Sensor" IEEE Transaction on Instrumentation and Measurement, vol. IM-15, No. 3, Sep. 1966, pp. 113-120.
Wellstood et al., "Integrated dc SQUID magnetometer with a high slew rate" Rev. ScI. Instrum., vol. 55, No. 6, Jun. 1984, pp. 952-957.

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