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:
Feb. 21, 2012
Filed:
Sep. 03, 2009
Toru Tanaka, Setagaya, JP;
Akio Ogura, Yokohama, JP;
Kazuya Omagari, Inagi, JP;
Nariaki Ogasawara, Yokohama, JP;
Toru Tanaka, Setagaya, JP;
Akio Ogura, Yokohama, JP;
Kazuya Omagari, Inagi, JP;
Nariaki Ogasawara, Yokohama, JP;
Texas Instruments Incorporated, Dallas, TX (US);
Abstract
A voltage sensing device with which high-precision voltage sensing is possible without the need to obtain a unique correction constant for each device. A pair of voltage input nodes NCk and NCk-is selected from voltage input nodes NC-NCn in switch part, and they are connected to sensing input nodes NA and NB in two types of patterns with different polarity (forward connection, reverse connection). Sensing input nodes NA and NB are held at reference potential Vm by voltage sensing part, and current Ina and Inb corresponding to the voltage at voltage input nodes NCk and NCk-flows to input resistors RIk and RIk-. Currents Ina and Inb are synthesized at different ratios in voltage sensing part, and sensed voltage signal Sis generated according to the synthesized current Ic. Sensed voltage data Swith low error is generated according to the difference between the two sensed voltage signals Sgenerated in the two connection patterns.