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:
Jan. 26, 2021
Filed:
Nov. 05, 2019
Efficient Power Conversion Corporation, El Segundo, CA (US);
John S. Glaser, Niskayuna, NY (US);
Michael A. de Rooij, Playa Vista, CA (US);
Efficient Power Conversion Corporation, El Segundo, CA (US);
Abstract
A current measurement circuit for determining a start time t, an end time t, and/or a peak time tfor a current pulse passing through a current conductor. The current measurement circuit includes a pickup coil and a threshold crossing detector. The pickup coil generates a voltage V' proportional to a magnetic field around the conductor, which is proportional to a change in current over time. The threshold crossing detector compares V′ and a threshold voltage and generates an output signal indicative of a transition time and whether a slope of V′ is positive or negative. The current measurement circuit can also include an integrator and a sample and hold circuit. The integrator integrates V′ over time and generates an integrated signal V. The sample and hold circuit compares Vto tand generates a second output signal which can be used to measure the pulse current.