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:
Jan. 21, 2014
Filed:
Nov. 09, 2012
Skyworks Solutions, Inc., Woburn, MA (US);
Shiaw Wen Chang, Thousand Oaks, CA (US);
Xuejun Chen, Moorpark, CA (US);
Guohao Zhang, Irvine, CA (US);
Jing Sun, Portland, OR (US);
Piyou Zhang, Aloha, OR (US);
Jinim Won, Santa Clarita, CA (US);
Skyworks Solutions, Inc., Woburn, MA (US);
Abstract
A multi-mode power amplifier includes a high-power mode amplifier circuit, a mid-power mode amplifier circuit, and a low power amplifier circuit, where the low-power mode amplifier circuit comprises a plurality of independently selectable power cell/amplifier branches. The multi-mode power amplifiers selectively enable or disable amplifier branches to provide multiple levels of amplification. Selectively enabling certain of a plurality of split collector amplifier branches provides multiple low power and ultra-low power amplifier modes without the impedance mismatch or board layout problems associated with an RF switch.