US 9,813,027 B2
Devices and methods related to embedded sensors for dynamic error vector magnitude corrections
Anthony Francis Quaglietta, Methuen, MA (US); Mark M. Doherty, Westford, MA (US); and Lui Lam, Lexington, MA (US)
Assigned to Skyworks Solutions, Inc., Woburn, MA (US)
Filed on Dec. 28, 2014, as Appl. No. 14/583,729.
Claims priority of provisional application 61/922,745, filed on Dec. 31, 2013.
Prior Publication US 2015/0303882 A1, Oct. 22, 2015
Int. Cl. H03F 1/30 (2006.01); H03F 3/19 (2006.01); H03F 3/21 (2006.01); H03F 1/02 (2006.01); H03F 3/72 (2006.01)
CPC H03F 1/30 (2013.01) [H03F 1/0261 (2013.01); H03F 3/19 (2013.01); H03F 3/211 (2013.01); H03F 3/72 (2013.01); H03F 2200/447 (2013.01); H03F 2200/451 (2013.01); H03F 2203/21131 (2013.01); H03F 2203/21145 (2013.01)] 18 Claims
OG exemplary drawing
1. A power amplifier (PA) comprising:
a PA die;
an amplification stage implemented on the PA die, the amplification stage including an array of amplification transistors configured to receive and amplify a radio-frequency (RF) signal;
a sensor implemented on the PA die, the sensor positioned relative to the array of amplification transistors to allow sensing of an operating condition representative of at least some of the amplification transistors, the sensor substantially isolated from the RF signal and the sensor being operated identical to the array of amplification transistors; and
a bias circuit in communication with the amplification stage and the sensor, the bias circuit configured to provide base bias signals having a common value to the amplification transistors and the sensor and configured to compensate for a dynamic error vector magnitude (DEVM) effect associated with operation of the amplification transistors.