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:
Jul. 08, 2014
Filed:
Feb. 14, 2012
Jose Cabanillas, San Diego, CA (US);
Calogero D Presti, San Diego, CA (US);
Norman L Frederick, Jr., San Diego, CA (US);
Jose Cabanillas, San Diego, CA (US);
Calogero D Presti, San Diego, CA (US);
Norman L Frederick, Jr., San Diego, CA (US);
QUALCOMM Incorporated, San Diego, CA (US);
Abstract
Techniques for reducing undesired source degeneration inductance are disclosed. In an exemplary design, an apparatus includes first and second connections. The first connection includes a first parasitic inductance acting as a source degeneration inductance of an amplifier. The second connection includes a second parasitic inductance magnetically coupled to the first parasitic inductance to reduce the source degeneration inductance of the amplifier. The amplifier (e.g., a single-ended power amplifier) may be coupled to circuit ground via the first connection. An impedance matching circuit may be coupled to the amplifier and may include a circuit component coupled to circuit ground via the second connection. The first connection may be located sufficiently close to (e.g., within a predetermined distance of) the second connection in order to obtain the desired magnetic coupling between the first and second parasitic inductances.