Electricity: measuring and testing – Measuring – testing – or sensing electricity – per se – Plural ranges – scales or registration rates
Patent
1986-04-24
1988-04-19
Eisenzopf, Reinhard J.
Electricity: measuring and testing
Measuring, testing, or sensing electricity, per se
Plural ranges, scales or registration rates
324158D, 307549, G01R 19165, G01R 3102
Patent
active
047392525
ABSTRACT:
An attenuator useful in measuring low level leakage currents is disclosed. The attenuator includes a plurality of current dividers coupled in cascade. Each current divider includes an input and two outputs between which the current entering the input is divided. The current exiting the last divider is significantly attenuated from that entering the attenuator. The attenuator output is coupled to the device under test and to one input of a differential amplifier. A known current is input to the differential amplifier and part is directed to the attenuator input and the other part to a current measuring device. The difference between the known current input to the differential amplifier and that measured is the current input to the attenuator. In the steady state, the current input to the differential amplifier from the current attenuator is about zero. Accordingly, the leakage current is equal to the known current entering the differential amplifier less the measured current divided by m, the attenuation provided by the attenuator.
REFERENCES:
patent: Re29918 (1979-02-01), Verkuil
patent: 3702967 (1972-11-01), McPhail
patent: 3795859 (1974-03-01), Benante et al.
patent: 3810049 (1974-05-01), Krause
patent: 3865648 (1975-02-01), Custrucci et al.
patent: 3904962 (1975-09-01), Olson, Jr.
patent: 3952257 (1976-04-01), Schade, Jr.
patent: 4055773 (1977-10-01), Shoeff
patent: 4068254 (1978-01-01), Erdi
patent: 4081822 (1978-03-01), Sao et al.
patent: 4246500 (1981-01-01), Okada et al.
patent: 4323795 (1982-04-01), Holloway et al.
"Picoampere Current Sounce and Measuring Circuit", by Hohl et al., IBM Tech. Disc. Bull., pp. 1017-1018, 9/75, vol. 18, #4.
Malaviya Shashi D.
Morris Daniel P.
Burns W.
Crane John D.
Eisenzopf Reinhard J.
International Business Machines - Corporation
LandOfFree
Current attenuator useful in a very low leakage current measurin does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Current attenuator useful in a very low leakage current measurin, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Current attenuator useful in a very low leakage current measurin will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-2178074