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:
Mar. 09, 2021
Filed:
Oct. 08, 2018
Applicant:
Cheng Bao, Waterloo, CA;
Inventor:
Cheng Bao, Waterloo, CA;
Assignee:
Other;
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
G01R 27/02 (2006.01); H02H 11/00 (2006.01); H02H 9/04 (2006.01); H02H 1/00 (2006.01);
U.S. Cl.
CPC ...
H02H 11/006 (2013.01); G01R 27/02 (2013.01); H02H 1/0007 (2013.01); H02H 9/045 (2013.01);
Abstract
A system and method of protecting measurement circuits from a potentially energized device under test (DUT). In one embodiment, the DUT is a capacitor that has acquired a charge though some means prior to needing to test it. In this embodiment, a circuit is provided that protects the measurement circuit by both limiting the current to the measurement circuit while simultaneously dissipating the energy stored in the DUT. In a further embodiment, a detection circuit is provided to measure the voltage at the terminal of the DUT. Only when the magnitude of the voltage is lower than a specific threshold will the measurement circuit be switched to and connected with the DUT.