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:
Apr. 09, 2013
Filed:
Mar. 26, 2004
Robert L. Doss, Jr., Ringgold, GA (US);
David Lashley, Catersville, GA (US);
Billy J. Worley, Hixson, TN (US);
Robert L. Doss, Jr., Ringgold, GA (US);
David Lashley, Catersville, GA (US);
Billy J. Worley, Hixson, TN (US);
Plantronics, Inc., Santa Cruz, CA (US);
Abstract
Systems and methods for reducing squealing or feedback on amplified telephones are disclosed. The telephone system generally includes a receiver in communication with a receive signal path, a transmitter in communication with a transmit signal path, a receiver gain detector configured to detect a receiver gain on the receive signal path, and a controller configured to operate the telephone system in full duplex when the receiver gain is approximately less than a receiver stability level and to operate the telephone system in adaptive duplex when the receiver gain is approximately above the receiver stability level. The adaptive duplex mode is such that an adaptive attenuation level alternately applied on the receive and transmit signal paths is dependent upon the level by which the receiver gain exceeds the receiver stability level.