US 12,273,076 B2
Power amplifier with protection loop
Baker Scott, San Jose, CA (US); Stephen James Franck, Felton, CA (US); George Maxim, Saratoga, CA (US); and Chong Woo, Fremont, CA (US)
Assigned to Qorvo US, Inc., Greensboro, NC (US)
Filed by Qorvo US, Inc., Greensboro, NC (US)
Filed on Sep. 29, 2021, as Appl. No. 17/488,823.
Prior Publication US 2023/0094883 A1, Mar. 30, 2023
Int. Cl. H03F 1/52 (2006.01); H03F 3/195 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/52 (2013.01) [H03F 3/195 (2013.01); H03F 3/245 (2013.01); H03F 2200/426 (2013.01); H03F 2200/451 (2013.01); H03F 2200/462 (2013.01); H03F 2200/471 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A power amplifier circuit, comprising:
a power amplifier comprising an output stage configured to provide an amplified output signal;
a current detector circuit coupled to the power amplifier and configured to provide an overcurrent protection signal indicating an overcurrent condition to:
a first bias regulator circuit that uses the overcurrent protection signal to control a bias circuit for the output stage; and
a second supply regulator circuit that uses the overcurrent protection signal to regulate an input signal that drives the output stage.