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. 03, 2019

Filed:

Sep. 14, 2017
Applicant:

Texas Instruments Incorporated, Dallas, TX (US);

Inventors:

Krishnanshu Dandu, Allen, TX (US);

Brian P. Ginsburg, Allen, TX (US);

Assignee:
Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/56 (2006.01); H03F 1/02 (2006.01); H03F 1/14 (2006.01);
U.S. Cl.
CPC ...
H03F 1/56 (2013.01); H03F 1/0205 (2013.01); H03F 1/14 (2013.01); H03F 3/4521 (2013.01); H03F 3/45183 (2013.01); H03F 3/45475 (2013.01); H03F 3/45775 (2013.01); H03F 2200/15 (2013.01); H03F 2200/408 (2013.01); H03F 2203/45291 (2013.01);
Abstract

Disclosed examples include differential amplifier circuits and variable neutralization circuits for providing an adjustable neutralization impedance between an amplifier input node and an amplifier output node, including neutralization impedance T circuits with first and second impedance elements in series between the amplifier input and output, and a third impedance element, including a first terminal connected to a node between the first and second impedance elements, and a second terminal connected to a transistor. The transistor operates according to a control signal to control the neutralization impedance between the amplifier input node and the amplifier output node.


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