US 12,218,634 B2
Dynamic envelope-tracking supply rail voltage setting
Nicholas Shute, Impington (GB)
Assigned to QUALCOMM Incorporated, San Diego, CA (US)
Filed by QUALCOMM Incorporated, San Diego, CA (US)
Filed on Sep. 14, 2021, as Appl. No. 17/447,599.
Prior Publication US 2023/0085587 A1, Mar. 16, 2023
Int. Cl. H03F 1/02 (2006.01); H03F 3/195 (2006.01); H03F 3/24 (2006.01)
CPC H03F 1/0227 (2013.01) [H03F 3/195 (2013.01); H03F 3/245 (2013.01); H03F 2200/102 (2013.01); H03F 2200/435 (2013.01); H03F 2200/451 (2013.01)] 28 Claims
OG exemplary drawing
 
1. An amplification system comprising:
a crest-factor-reduction (CFR) circuit coupled to an input node and configured to generate an input signal having a constant peak-to-average-power ratio (PAPR) for a power control period;
a first amplifier configured to generate an amplifier output voltage based on the input signal;
a second amplifier having an output coupled to a supply node for the first amplifier;
a voltage regulator having an output coupled to a supply node for the second amplifier; and
control circuitry configured to control the voltage regulator to generate a supply voltage at the supply node for the second amplifier based on an indication associated with the amplifier output voltage, the control circuitry being configured to control the voltage regulator through at least providing an updated control setting for the voltage regulator with a periodicity associated with the power control period.