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:
Mar. 25, 2014
Filed:
Oct. 28, 2011
Yaqi HU, Plano, TX (US);
Yanli Fan, Allen, TX (US);
Huawen Jin, Plano, TX (US);
Ulrich Schacht, Lower Saxony, DE;
Karl Muth, Richardson, TX (US);
Mark W. Morgan, Allen, TX (US);
Yaqi Hu, Plano, TX (US);
Yanli Fan, Allen, TX (US);
Huawen Jin, Plano, TX (US);
Ulrich Schacht, Lower Saxony, DE;
Karl Muth, Richardson, TX (US);
Mark W. Morgan, Allen, TX (US);
Texas Instruments Incorporated, Dallas, TX (US);
Texas Instruments Deutschland GmbH, Freising, DE;
Abstract
An apparatus for equalizing channels is provided, which is generally transparent to link training. The apparatus generally includes equalization paths formed by an input circuit, a crossbar, and an output circuit and a controller. Each equalization path is coupled to at least one of the channels, and a controller has a VGA loop, a crossbar loop, and a driver loop. The AGC loop receives a first reference voltage and provides a gain control signal to the input circuit, and the gain control network comprises a replica of at least one of the equalization paths. The crossbar loop receives a second reference voltage and provides a crossbar control signal to the crossbar. The driver loop receives a third reference voltage and provides a driver control signal for the output circuit.