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, 2018
Filed:
Aug. 13, 2012
Mark Vernon Lane, San Diego, CA (US);
Chang-ho Lee, San Diego, CA (US);
Christian Holenstein, La Mesa, CA (US);
Mahim Ranjan, San Diego, CA (US);
Praveen-kumar Sampath, San Diego, CA (US);
Frederic Bossu, San Diego, CA (US);
Sumit Verma, San Diego, CA (US);
Wesley Alan Sampson, La Jolla, CA (US);
Mark Vernon Lane, San Diego, CA (US);
Chang-Ho Lee, San Diego, CA (US);
Christian Holenstein, La Mesa, CA (US);
Mahim Ranjan, San Diego, CA (US);
Praveen-Kumar Sampath, San Diego, CA (US);
Frederic Bossu, San Diego, CA (US);
Sumit Verma, San Diego, CA (US);
Wesley Alan Sampson, La Jolla, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Techniques for using a narrow filter located before a power amplifier to reduce interference in an adjacent frequency band are disclosed. In an exemplary design, an apparatus (e.g., a wireless device) includes the narrow filter and the power amplifier. The narrow filter is for a first frequency band (e.g., Band) and has a first bandwidth that is more narrow than the first frequency band. The narrow filter receives and filters an input radio frequency (RF) signal and provides a filtered RF signal. The power amplifier receives and amplifies the filtered RF signal and provides an amplified RF signal. The apparatus may further include a full filter for the first frequency band and located after the power amplifier. The full filter receives and filters the amplified RF signal and provides an output RF signal when it is selected for use.