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. 24, 2001
Filed:
Jun. 30, 1999
William J. Curry, Angier, NC (US);
Tyco Electronics Corporation, Middletown, PA (US);
Abstract
A line protector is provided which includes positive temperature coefficient resistors in the circuit which are thermally coupled to voltage clamping devices which require protection from failures caused by overheating from conducting excessive amounts of current for a time sufficient to cause device breakdown. This may compensate for the performance variability of the positive temperature coefficient resistors so as to improve the likelihood that they will experience a sufficient temperature increase to switch before the voltage clamping device reaches a breakdown temperature. Furthermore, a line protector which may provide protection against current flow to the communications circuit from overvoltage conditions on the circuit side of the line protector or by a ground potential difference between the line protector and the communications circuit is also provided including positive temperature coefficient resistors positioned between the overvoltage line protector circuits and the communications circuit.