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:
May. 24, 2016
Filed:
May. 24, 2013
Qualcomm Incorporated, San Diego, CA (US);
Ahmed A Youssef, San Diego, CA (US);
Li-Chung Chang, Irvine, CA (US);
Qualcomm Incorporated, San Diego, CA (US);
Abstract
Techniques for providing a receiver front end supporting carrier aggregation with gain alignment and improved matching across modes. In an aspect, auxiliary circuitry is configurable to selectively enable or disable mutual coupling between a source degeneration inductor of an LNA input transistor and an auxiliary inductor. A negative turns ratio coupling is provided between the inductors, such that the effective inductance of the source degeneration inductor is lowered when mutually coupled to the auxiliary inductor. In a non-carrier aggregation (non-CA) mode, the auxiliary inductor is disabled, while in a carrier aggregation (CA) mode, the auxiliary inductor is enabled. In this manner, using a single transistor, gain alignment across non-CA and CA modes is achieved. Furthermore, matching is preserved across non-CA and CA modes using a single external matching component.