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. 26, 2000
Filed:
Jun. 10, 1998
Edward Liu, Sunnyvale, CA (US);
LSI Logic Corporation, Milpitas, CA (US);
Abstract
A user control system for allowing an end user to control the level of a signal transmitted from a host to a transmission medium is disclosed. The user control system includes a digital current controller electrically connected to a bias voltage generator, and formed of a binary weighted transistor array that is switched according to user inputs received from a host. Also disclosed is a transmission system incorporating the user control system and further including a current-mode digital-analog converter, an on-chip low-pass filter, a line driver, and output impedance control. Further, a method for optimizing the output signal through user control is disclosed. The control system and method can be used in transmission of Ethernet signals onto an unshielded twisted pair cable. In addition, with appropriate modification, the transmission system and method can be used for transmitting ATM or other signals onto a transmission medium.