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:
Oct. 18, 2016
Filed:
Feb. 12, 2015
Applicant:
Qualcomm Incorporated, San Diego, CA (US);
Inventors:
Muhammad Hassan, San Diego, CA (US);
Bhushan Shanti Asuri, San Diego, CA (US);
Apsara Ravish Suvarna, San Diego, CA (US);
Youngchang Yoon, San Diego, CA (US);
Assignee:
QUALCOMM Incorporated, San Diego, CA (US);
Attorney:
Primary Examiner:
Int. Cl.
CPC ...
H03F 3/45 (2006.01); H03F 1/22 (2006.01);
U.S. Cl.
CPC ...
H03F 3/45632 (2013.01); H03F 1/223 (2013.01); H03F 2200/09 (2013.01); H03F 2200/378 (2013.01); H03F 2203/45082 (2013.01); H03F 2203/45084 (2013.01); H03F 2203/45204 (2013.01);
Abstract
A differential amplifier having a tunable filter is disclosed. The tunable filter may attenuate some common-mode signals while not affecting amplification of differential signals. The tunable filter may include a resonant circuit to select frequencies of common-mode signals to attenuate. The resonant circuit may include a variable capacitor series-coupled to an inductor. A resonant frequency of the resonant circuit may be determined, in part, by a capacitance value of the variable capacitor.