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:
Aug. 07, 2012
Filed:
Sep. 10, 2007
Tae Wook Kim, Austin, TX (US);
Guy Klemens, San Diego, CA (US);
Kenneth Charles Barnett, Austin, TX (US);
Susanta Sangupta, Leander, TX (US);
Gurkanwal Singh Sahota, San Diego, CA (US);
Tae Wook Kim, Austin, TX (US);
Guy Klemens, San Diego, CA (US);
Kenneth Charles Barnett, Austin, TX (US);
Susanta Sangupta, Leander, TX (US);
Gurkanwal Singh Sahota, San Diego, CA (US);
QUALCOMM, Incorporated, San Diego, CA (US);
Abstract
An amplifier with integrated filter (e.g., an LNA) is described. In one design, the amplifier may include a gain stage, a filter stage, and a buffer stage. The gain stage may provide signal amplification for an input signal. The filter stage may provide filtering for the input signal. The buffer stage may buffer a filtered signal from the filter stage. The amplifier may further include a second filter stage and a second buffer stage. The second filter stage may provide additional filtering for the input signal. The second buffer stage may buffer a second filtered signal from the second filter stage. All of the stages may be stacked and coupled between a supply voltage and circuit ground. The filter stage(s) may implement an elliptical lowpass filter. Each filter stage may include an inductor and a capacitor coupled in parallel and forming a resonator tank to attenuate interfering signals.