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:
Feb. 05, 2008
Filed:
Jan. 19, 2007
Oleksiy Zabroda, Kanata, CA;
Oleksiy Zabroda, Kanata, CA;
STMicroelectronics, Inc., Carrollton, TX (US);
Abstract
A gigabit ethernet line driver includes a transmitter having both transmitter and active hybrid outputs. The transmitter consists of a plurality of transmitter clusters each connected to both the transmitter and active hybrid outputs. Each transmitter cluster includes a plurality of transmitter cells consisting of a driver cell and digital to analog converter connected to driver cell. A hybrid circuit connects between the transmitter outputs and receiver inputs for separating a receiver signal from the transmitter signal responsive to a tuning signal. The hybrid circuit includes first and second resistor strings connected between the receiver inputs and the transmitter outputs, the first and second resistor strings each having many resistors with taps on each of the resistors; corresponding transistor switches connecting the taps of each of the first and second resistor strings to the hybrid inputs; and a circuit that selects a pair of the plurality of transistor switches connecting to a particular tap in response to the tuning signal such that a current to compensate for a transmitted signal is provided at the receiver inputs.