Electricity: measuring and testing – Magnetic – With means to create magnetic field to test material
Patent
1994-09-26
1997-12-09
O'Shea, Sandra L.
Electricity: measuring and testing
Magnetic
With means to create magnetic field to test material
324210, 324252, 324235, G01R 3512, G01N 2772
Patent
active
056964455
ABSTRACT:
A tester for measuring the resistance of magnetoresistive heads as a function of the magnetic field applied to the heads. The tester applies a time varying magnetic field to the magnetoresistive head to be tested and filters the resulting time varying (AC) voltage signal indicative of the resistance of the head with a capacitor to remove the DC component of the signal. The AC component of the signal is then amplified, digitized, and analyzed to obtain the resistance properties of the magnetoresistive head.
REFERENCES:
patent: 3826976 (1974-07-01), Winston et al.
patent: 3956693 (1976-05-01), Zatranen et al.
patent: 3993946 (1976-11-01), Makino
patent: 4038597 (1977-07-01), Gorter et al.
patent: 4048557 (1977-09-01), Chen
patent: 4119911 (1978-10-01), Johnson, Jr.
patent: 4142218 (1979-02-01), Gorter
patent: 4190799 (1980-02-01), Miller et al.
patent: 4280158 (1981-07-01), De Niet
patent: 4488112 (1984-12-01), Thompson et al.
patent: 4491794 (1985-01-01), Daley et al.
patent: 4514687 (1985-04-01), Van Husen
patent: 4703378 (1987-10-01), Imakoshi et al.
patent: 4716306 (1987-12-01), Sato et al.
patent: 4868909 (1989-09-01), Lowel
patent: 4875010 (1989-10-01), Yokosawa et al.
patent: 5065094 (1991-11-01), Mowry
patent: 5206588 (1993-04-01), Thorn
patent: 5287056 (1994-02-01), Jackson et al.
patent: 5343145 (1994-08-01), Wellman et al.
patent: 5483162 (1996-01-01), Ushikoshi et al.
Kryder, M. H., Ahn, K. Y., Mazzeo, N. J., Schwarzl, S., and Kane, S. M., "Magnetic Properties and Domain Structures in Narrow NiFe Stripes", IEEE Transactions on Magnetics, vol. MAG-16, No. 1, Jan., 1980.
Barnard, R.D., "Magnetoresistance Measurement in Magnetic Alloys in Ultralow Magnetic Fields", J. Appl. Phys., vol. 73, No. 10, Pt. IIB, May 1993, pp. 6846-6848.
Kitada, M. and Nakatani, R., "Magnetoresistive Response of Giant-Magnetoresistive NiFe/Cu Multilayer Elements", Journal of Magnetism and Magnetic Materials, vol. 127, Nos. 1/2, Oct. 1993, pp. 224-228.
Epperson Dennis H.
O'Shea Sandra L.
Patidar Jay M.
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