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. 10, 1996
Filed:
Dec. 01, 1993
Charles E Lawrence, Lytle, TX (US);
Floyd H McDougall, San Antonio, TX (US);
Jay W Lundschen, San Antonio, TX (US);
Datapoint Corporation, San Antonio, TX (US);
Abstract
Improved gain control is obtained in each receiver of a LAN interface or hub in a LAN of the type using amplitude critical signals for conveying information. An evaluation circuit compares a signal representing a calibration value to a predetermined limits and adjusts the gain by one of a plurality of amplification levels to maintain a high level signals which are more accurately decoded into digital information. Improved noise cancellation is also obtained by creating a primary copy and an inverted copy of the received amplitude critical signal, amplifying the primary and inverted copy signals by the same predetermined amount and adding the amplified signals. The addition reinforces the value of the received amplitude critical signal while effectively subtracting the noise effects.