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. 02, 2002
Filed:
Oct. 30, 1998
Philip H. Sutterlin, Saratoga, CA (US);
Walter J. Downey, Los Gatos, CA (US);
Mark Adrian Stubbs, Felton, CA (US);
Luna Chen, Mountain View, CA (US);
Echelon Corporation, San Jose, CA (US);
Abstract
A dual channel transceiver which operates at two different frequencies and which may be used in a network using older transceivers operating at a single frequency is disclosed. A pilot tone is transmitted by the transceiver when it is using the second channel to cause the older transfers to remain synchronized and thereby prevent them from transmitting data which would otherwise interfere with the data on the second channel. The relative magnitude of the signals on both channels is compared to prevent the detection of cross-talk on the second channel as data.