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. 01, 2021

Filed:

Jun. 10, 2019
Applicant:

Mediatek Inc., Hsin-Chu, TW;

Inventors:

Yi-Chieh Huang, Hsin-Chu, TW;

Sung-Lin Tsai, Hsin-Chu, TW;

Assignee:

MediaTek Inc., Hsin-Chu, TW;

Attorney:
Primary Examiner:
Assistant Examiner:
Int. Cl.
CPC ...
H03L 7/093 (2006.01); H03K 3/03 (2006.01); H03L 7/089 (2006.01); H03L 7/091 (2006.01); H03L 7/099 (2006.01);
U.S. Cl.
CPC ...
H03L 7/093 (2013.01); H03K 3/0315 (2013.01); H03L 7/089 (2013.01); H03L 7/091 (2013.01); H03L 7/0995 (2013.01); H03L 2207/06 (2013.01);
Abstract

A filter includes a filter circuit, a first processing circuit, and a second processing circuit. The filter circuit receives an input signal from an input node of the filter, and converts the input signal into a voltage output. The first processing circuit provides a first control voltage to an output node of the filter according to the voltage output, wherein the first control voltage is derived from an alternating current (AC) component of the voltage output. The second processing circuit provides a second control voltage to the output node of the filter according to the voltage output, wherein the second control voltage is derived from applying DC level shift to a direct current (DC) component of the voltage output.


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