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. 21, 1982
Filed:
Jun. 30, 1980
Charles W Chambers, Jr, Downers Grove, IL (US);
Tellabs, Inc., Lisle, IL (US);
Abstract
An improved impedance generator circuit, for use with two-wire transmission systems of the type encountered in telephony, is adapted to be interfaced with the wires and operates in a manner to effectively generate a desired positive or negative impedance across the wires. The impedance generator includes a current source, and generates a positive impedance by drawing from the wires all of the current that would otherwise be required by the positive impedance, or a negative impedance by providing on the wires all of the current that would otherwise be provided by the negative impedance, in response to a metallic voltage applied across the wires by a signal source. At the same time, the impedance generator provides common mode rejection to longitudinal voltages on the wires.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile