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. 27, 2017
Filed:
Dec. 14, 2015
Keysight Technologies, Inc., Minneapolis, MN (US);
Kiyoshi Chikamatsu, Tokyo, JP;
Keysight Technologies, Inc., Santa Rosa, CA (US);
Abstract
A current sensing circuit for sensing current in a DUT includes first and second input terminals; a shunt resistor connected to the first input terminal; a shunt resistor sensing circuit that amplifies voltage between terminals of the shunt resistor; a low pass filter coupled to an output of the shunt resistor sensing circuit; a current transformer having a primary winding connected between a terminal of the shunt resistor and the second input terminal; a current transformer sensing circuit connected to a secondary winding of the current transformer and configured to amplify current from the secondary winding; and an adder configured to add outputs of the low pass filter and the first current transformer sensing circuit. The current transformer sensing circuit includes a first transimpedance amplifier and a first input resistor. The current transformer has a low frequency-side cutoff frequency equal to a cutoff frequency of the low pass filter.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile