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.:

US 9813034 B1

PDF
Full Text
Expired
Date of Patent:
Nov. 07, 2017

Filed:

Jul. 07, 2016
Applicant:

Marvell World Trade Ltd, St. Michael, BB;

Inventors:

Yongxu Wang, Shanghai, CN;

Wenrong Qian, Shanghai, CN;

Kapil Jain, Santa Clara, CA (US);

Song Chen, Shanghai, CN;

Xiaoxiao Zhao, Shanghai, CN;

Assignee:

Marvell World Trade Ltd., St. Michael, BB;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H04R 29/00 (2006.01); H03G 1/00 (2006.01); H03F 3/45 (2006.01); H04R 3/10 (2006.01);
U.S. Cl.
CPC ...
H03G 1/0035 (2013.01); H03F 3/45475 (2013.01); H03F 3/45973 (2013.01); H04R 3/10 (2013.01); H03F 2200/78 (2013.01); H03F 2203/45212 (2013.01);
Abstract

Aspects of the disclosure provide an amplification circuit. The amplification circuit includes an amplifier and a first variable resistive device. The amplifier includes first and second input nodes configured to receive the first and second input electrical signals and first and second output nodes configured to output first and second output electrical signals having amplified voltages relative to the first and second input electrical signals. The first variable resistive device is electrically coupled to the second input node of the amplifier. The first variable resistive device being configured to have a selected resistance value to compensate for a direct current (DC) voltage difference between the first and second input electrical signals based on a DC voltage difference between first and second output electrical signals that are output from the first and second output nodes of the amplifier.


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