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:
Oct. 14, 2014
Filed:
Mar. 18, 2010
Motonobu Ikeda, Sakai, JP;
Satoshi Yagi, Sakai, JP;
Ryousuke Yamamoto, Sakai, JP;
Daikin Industries, Ltd., Osaka, JP;
Abstract
The current-sensing circuit () includes a shunt resistor (R) connected in series with a path of current from an inverter (), an operational amplifier () amplifying voltage across both ends of this shunt resistor (R) with a predetermined gain, a low-pass filter () averaging output voltage of this operational amplifier (), and an arithmetic unit () calculating the current flowing through the path based on output voltage of the low-pass filter (). The supply voltage of the operational amplifier () is set higher than the supply voltage of the arithmetic unit (). The output voltage of the operational amplifier () is averaged at the low-pass filter () to a lower value than the supply voltage of the arithmetic unit ().