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, 2015

Filed:

Apr. 04, 2012
Applicants:

Gianluigi DE Geronimo, Syosset, NY (US);

Shaorui LI, Yaphank, NY (US);

Inventors:

Gianluigi De Geronimo, Syosset, NY (US);

Shaorui Li, Yaphank, NY (US);

Assignee:
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 5/00 (2006.01); H03H 1/00 (2006.01); H03F 1/34 (2006.01); H03F 3/21 (2006.01); H03F 3/70 (2006.01); H03H 11/12 (2006.01);
U.S. Cl.
CPC ...
H03H 1/0007 (2013.01); H03F 1/34 (2013.01); H03F 3/211 (2013.01); H03F 3/70 (2013.01); H03F 2200/144 (2013.01); H03F 2200/408 (2013.01); H03H 11/1217 (2013.01);
Abstract

An analog filter is presented that comprises a chain of filter stages, a feedback resistor for providing a negative feedback, and a feedback capacitor for providing a positive feedback. Each filter stage has an input node and an output node. The output node of a filter stage is connected to the input node of an immediately succeeding filter stage through a resistor. The feedback resistor has a first end connected to the output node of the last filter stage along the chain of filter stages, and a second end connected to the input node of a first preceding filter stage. The feedback capacitor has a first end connected to the output node of one of the chain of filter stages, and a second end connected to the input node of a second preceding filter stage.


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