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:
Sep. 27, 2016
Filed:
Feb. 11, 2015
Lenovo Enterprise Solutions (Singapore) Pte. Ltd., Singapore, SG;
Jamaica L. Barnette, Durham, NC (US);
Raymond M. Clemo, Raleigh, NC (US);
Lenovo Enterprise Solutions (Singapore) Pte. Ltd., Singapore, SG;
Abstract
A protection circuit or electronic circuit breaker protects and supplies power to a device load. The protection circuit includes a current mirror, a reference load that models the device load, and a comparator circuit that outputs a signal indicating that a fault has been detected in the device load during turn on. The current mirror provides an amount of current in proportion to the current supplied to the device load. The same proportion is used to calculate the capacitance and resistance of the reference load. Accordingly, if the device load has no fault, the reference voltage remains proportional to the output voltage to the device load. However, if the device load has a fault, the reference voltage will increase faster than the output voltage such that the comparator will generate a fault signal that turns off a transistor pass element that was supplying current to the device load.