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:
Dec. 27, 2011
Filed:
May. 04, 2009
Applicant:
Kannan Krishna, Dallas, TX (US);
Inventor:
Kannan Krishna, Dallas, TX (US);
Assignee:
Texas Instruments Incorporated, Dallas, TX (US);
Primary Examiner:
Int. Cl.
CPC ...
G05F 1/652 (2006.01); G05F 1/656 (2006.01);
U.S. Cl.
CPC ...
Abstract
A Universal Serial Bus (USB) switch matrix is provided. The switch matrix generally comprises a switch network, and amplifier, a adjustable current source, and variable resistors. The switch network is able to output a differential output signal and a common mode signal. The amplifier compares the common mode signal to a reference voltage, and the amplifier adjusts the magnitude of the current from the adjustable current source and the resistances of the variable resistors based at least in part on the comparison to adjust the peak-to-peak voltage swing of the output signal.