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:
Feb. 10, 2015

Filed:

Sep. 27, 2013
Applicant:

Mediatek Inc., Hsin-Chu, TW;

Inventors:

Hung-Chieh Tsai, Tainan, TW;

Chen-Yen Ho, New Taipei, TW;

Yu-Hsin Lin, Taipei, TW;

Assignee:

Mediatek Inc., Science-Based Industrial Park, Hsin-Chu, TW;

Attorneys:
Primary Examiner:
Int. Cl.
CPC ...
H04B 1/10 (2006.01); H03H 11/04 (2006.01);
U.S. Cl.
CPC ...
H03H 11/0405 (2013.01);
Abstract

A filter comprises an integrator, a signal feeding path, a first operational amplifier and a second capacitor. The integrator comprises a first input terminal and a first output terminal. The signal feeding path comprises: a first resistor, having a first terminal coupled to the first output terminal; a first capacitor, having a first terminal coupled to the second terminal of the first resistor; and a second resistor, having a first terminal coupled to the integrator and having a second terminal coupled to the second terminal of the first capacitor. The first operational amplifier comprises a second input terminal coupled to the second terminal of the first resistor and the first terminal of the first capacitor, and comprises a second output terminal. The second capacitor comprises a first terminal coupled to the second terminal of the first capacitor, and comprises a second terminal coupled to the second output terminal.


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