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:
Jun. 30, 2020

Filed:

Sep. 30, 2019
Applicant:

Mediatek Inc., Hsin-Chu, TW;

Inventor:

Che-Hsun Kuo, Tainan, TW;

Assignee:

MEDIATEK INC., Hsin-Chu, TW;

Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/16 (2006.01); H03F 1/32 (2006.01); H03F 3/345 (2006.01); H03F 1/02 (2006.01); H03F 3/193 (2006.01);
U.S. Cl.
CPC ...
H03F 1/3205 (2013.01); H03F 1/0233 (2013.01); H03F 1/0255 (2013.01); H03F 3/193 (2013.01); H03F 3/345 (2013.01); H03F 2200/102 (2013.01); H03F 2200/66 (2013.01); H03F 2200/69 (2013.01);
Abstract

A source follower with an input node and an output node includes a first transistor, a second transistor, and a DC (Direct Current) tracking circuit. The first transistor has a control terminal, a first terminal coupled to a first node, and a second terminal coupled to a second node. The second transistor has a control terminal, a first terminal coupled to a ground voltage, and a second terminal coupled to the first node. The DC tracking circuit sets the second DC voltage at the second node to a specific level. The specific level is determined according to the first DC voltage at the first node. The output node of the source follower is coupled to the first node.


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