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:
Jun. 09, 1981
Filed:
Aug. 08, 1979
Takeshi Yasuhara, Kawasaki, JP;
Keiichiro Tago, Kawasaki, JP;
Fuji Electric Co., Ltd., Kawasaki, JP;
Abstract
Apparatus for converting a mechanical displacement to an electrical signal having a capacitor type displacement detector for detecting a mechanical displacement in terms of capacitances C1 and C2 of two capacitors and means for producing a signal corresponding to (C1-C2)/(C1+C2). The capacitance sum (C1+C2) is converted into a pulse with the duty ratio D proportional to the capacitance sum and a voltage Vd' corresponding to the capacitance difference (C1-C2) is multiplied by the reciprocal 1/D of the duty ratio D so as to produce a current proportional to a desired amount (C1-C2)/(C1+C2). Even if the difference voltage changes widely, the duty ratio D is not affected by this change and therefore the linearity error is not increased.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile