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:
Feb. 12, 1991
Filed:
Mar. 22, 1989
Applicant:
Inventor:
Gyula Jakab, Ontario, CA;
Assignee:
Northern Telecom Limited, Montreal, CA;
Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H01F / ; H04M / ;
U.S. Cl.
CPC ...
379413 ; 336222 ; 379399 ;
Abstract
In a SLIC in which loop current is supplied via active circuits, feed resistances via which the active circuits are conventionally coupled to the line are constituted by bifilar resistance wire windings of a ferrite core transformer, which may include a third winding coupled to an input of the active circuits.