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.
Patent No.:
Date of Patent:
Mar. 31, 2020
Filed:
May. 31, 2017
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Rahul Karmaker, San Diego, CA (US);
Gary Lee Brown, Jr., Carlsbad, CA (US);
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03K 3/26 (2006.01); H03F 3/19 (2006.01); H03H 11/12 (2006.01); H03F 3/24 (2006.01); H03F 3/45 (2006.01); H03F 3/195 (2006.01);
U.S. Cl.
CPC ...
H03F 3/19 (2013.01); H03F 3/195 (2013.01); H03F 3/245 (2013.01); H03F 3/45475 (2013.01); H03H 11/1256 (2013.01); H03F 2200/408 (2013.01); H03F 2200/451 (2013.01); H03F 2203/45526 (2013.01); H03H 2210/012 (2013.01); H03H 2210/015 (2013.01); H03H 2210/025 (2013.01); H03H 2210/028 (2013.01); H03H 2210/04 (2013.01);
Abstract
Certain aspects of the present disclosure are generally directed to a tunable active filter and a method of calibrating a tunable active filter. One example apparatus is a filter circuit that generally includes a resistor-capacitor (RC) topology tunable active filter comprising a first amplifier, a second amplifier, and a feedback path coupled between an input of the first amplifier and an output of the second amplifier. The filter circuit also includes a negative transconductance circuit coupled to a first node of the tunable active filter.