US 11,996,810 B2
Digital compensation system for a radio frequency power amplifier module
Frederick L. Martin, Plantation, FL (US); Gangadhar Burra, Fremont, CA (US); Nikolaus Klemmer, Dallas, TX (US); Paul Edward Gorday, West Palm Beach, FL (US); and Bror Peterson, Fairview, TX (US)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Apr. 30, 2021, as Appl. No. 17/245,027.
Claims priority of provisional application 63/018,661, filed on May 1, 2020.
Prior Publication US 2021/0344313 A1, Nov. 4, 2021
Int. Cl. H03F 3/24 (2006.01); H03F 1/02 (2006.01); H03F 3/195 (2006.01)
CPC H03F 3/245 (2013.01) [H03F 1/0227 (2013.01); H03F 1/0288 (2013.01); H03F 3/195 (2013.01); H03F 2200/102 (2013.01); H03F 2200/168 (2013.01); H03F 2200/451 (2013.01)] 23 Claims
OG exemplary drawing
 
1. A digital compensation system for a radio frequency (RF) power amplifier module comprising:
an RF power amplifier having a first input, a first output, and a first bias input, wherein the RF power amplifier is configured to receive an RF signal at the first input and generate an amplified version of the RF signal at the first output; and
compensation circuitry coupled between the first input and the first output and a bias output coupled to the RF power amplifier, wherein the compensation circuitry is configured, in response to the RF signal, to generate a bias signal at the first bias input to correct dynamic bias errors caused by amplification variations that have at least one time constant encompassing amplification gain fluctuations due to charge trapping within the RF amplifier.