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:
Feb. 14, 2017
Filed:
Dec. 09, 2015
Skyworks Solutions, Inc., Woburn, MA (US);
Snaptrack, Inc., San Diego, CA (US);
David Steven Ripley, Marion, IA (US);
Sabah Khesbak, Irvine, CA (US);
Benjamin Bartram, Baldock, GB;
Kevin Lee Cobley, Lower Cambourne, GB;
Robert Astle Henshaw, Sudbury, GB;
Julian Hildersley, Hertsfordshire, GB;
Robert John Thompson, Cedar Rapids, IA (US);
SKYWORKS SOLUTIONS, INC., Woburn, MA (US);
SNAPTRACK, INC., San Diego, CA (US);
Abstract
Apparatus and methods for calibration of envelope trackers are provided. In one embodiment, a power amplifier system includes a VGA that amplifies an RF input signal to generate an amplified RF input signal, a power amplifier that amplifies the amplified RF input signal to generate an RF output signal, and an envelope tracker that generates a supply voltage for the power amplifier. The envelope tracker includes a scaling module that generates a scaled envelope signal based on a power control level (PCL) signal and an envelope signal that changes in relation to an envelope of the RF input signal. The envelope tracker further includes a calibration module that controls an amount of scaling of the scaled envelope signal based on calibration data to compensate for an envelope amplitude misalignment of the envelope tracker. The envelope tracker controls the voltage level of the supply voltage based on the scaled envelope signal.