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. 17, 1990
Filed:
Jul. 15, 1988
Simon J Tol, Hilversum, NL;
Kornelis J Wouda, Nuenen, NL;
AT&T Bell Laboratories, Murray Hill, NJ (US);
Abstract
A transceiver arrangement for full-duplex data transmission over a two-wire circuit (6) comprises a transmitter part (1-4), a receiver part (7, 8, 11-15), a hybrid junction (5) to interconnect the transmitter and receiver parts and the two-wire circuit (6), and an echo canceller 9 whose input is connected to the transmitter part and whose output is connected to the receiver part, the arrangement further comprising switching means (S.sub.1) enabled in a test mode for disconnecting the receiver part (7, 8, 11-15) from the two-wire circuit (6). With a single test the proper functioning of the transmitter and receiver parts of the arrangement as well as that of the echo canceller (9) can be checked, because the arrangement also comprises switching means (S.sub.2) enabled in a test mode for disconnecting the input of the echo canceller (9) from the transmitter part (1-4) and for connecting it to a data signal source (16) arranged for generating a data signal that is substantially uncorrelated with the transmitter signal.
Data source: USPTO (United States Patent and Trademark Office) public patent records. Weekly synchronization. How IDiyas builds this profile