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.

Date of Patent:
Dec. 13, 2016

Filed:

Sep. 01, 2015
Applicant:

Realtek Semiconductor Corp., Hsinchu, TW;

Inventors:

Chao-Cheng Lee, Hsin-Chu, TW;

Jian-Ru Lin, Nantou County, TW;

Chien-Ming Wu, Hsinchu County, TW;

Shih-Wei Wang, Hualien County, TW;

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03H 7/38 (2006.01); H03F 1/56 (2006.01); H03H 7/40 (2006.01); H03F 3/45 (2006.01);
U.S. Cl.
CPC ...
H03F 1/56 (2013.01); H03F 3/45475 (2013.01); H03H 7/40 (2013.01); H03F 2200/114 (2013.01); H03F 2200/387 (2013.01); H03F 2203/45008 (2013.01); H03F 2203/45022 (2013.01); H03F 2203/45686 (2013.01);
Abstract

A transmission line driver circuit includes: a transmission line driving amplifier having a first transmission terminal and a second transmission terminal; a first signal node; a second signal node; a first adjustable resistor positioned between the first transmission terminal and the first signal node; a second adjustable resistor positioned between the second transmission terminal and the second signal node; an internal node; a first divider resistor positioned between the first signal node and the internal node; a second divider resistor positioned between the second signal node and the internal node; a comparing circuit for comparing a divided voltage at the internal node with a reference voltage to generate a comparison signal; and an adjusting circuit for adjusting resistance of at least one of the first and second adjustable resistors according to the comparison signal.


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