The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Mar. 13, 1979
Filed:
Mar. 20, 1978
Tamotsu Kobayashi, Yokohama, JP;
Hokushin Electric Works, Ltd., Tokyo, JP;
Abstract
A resistance-to-current converter in which a sensing resistor, such as a resistance thermometer bulb for sensing changes in temperature, forms an arm in a resistance bridge which is periodically excited by a switching circuit interposed between a power supply and the input junctions of the bridge. The voltage produced at the output junctions of the bridge during the 'on' and 'off' excitation states are separately detected. The detected signal obtained in the 'off' state is subtracted from that obtained in the 'on' state to produce an output signal from which there is eliminated the error component resulting from a leakage resistance path coupled to said sensing resistor.