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:
Jul. 17, 2018
Filed:
Aug. 24, 2015
Shoretel, Inc., Sunnyvale, CA (US);
George Michael Hey, San Jose, CA (US);
Mitel Networks, Inc., , DE (US);
Abstract
An auxiliary circuit for providing current to an external device includes a first switch disposed between a first node and a second node. The first switch is configured to electrically couple the first node to the second node when a first voltage exceeds a first threshold. A comparison circuit has an input coupled to the second node and is configured to compare a second voltage at the input to a second threshold. A second switch has a control terminal coupled to an output of the comparison circuit, a first terminal coupled to a source, and a second terminal for coupling to the external device. The comparison circuit is configured to provide a third voltage at control terminal when the second voltage exceeds the second threshold. The second switch is configured to provide the current from the source to the external device when the third voltage exceeds a threshold of the second switch.