US 11,705,868 B2
System for adapting the voltage of a drain of a power stage
Wilfried Demenitroux, Cholet (FR); Nicolas Berthou, Genevilliers (FR); and Olivier Jardel, Toulouse (FR)
Assigned to THALES, Courbevoie (FR)
Filed by THALES, Courbevoie (FR)
Filed on Dec. 21, 2021, as Appl. No. 17/558,220.
Claims priority of application No. 2013971 (FR), filed on Dec. 22, 2020.
Prior Publication US 2022/0200536 A1, Jun. 23, 2022
Int. Cl. H03F 1/02 (2006.01); H03F 3/24 (2006.01); H04B 1/04 (2006.01)
CPC H03F 1/0233 (2013.01) [H03F 3/245 (2013.01); H04B 1/04 (2013.01); H03F 2200/451 (2013.01); H04B 2001/0416 (2013.01)] 5 Claims
OG exemplary drawing
 
1. A system for adapting a voltage of a drain of a power stage, the system comprising:
at least two transmission paths Txn, a transmission path comprising a resistive element (1n), a phase control module (2n), and a power stage (3n) at an output of which at least one radiating element (En) is arranged;
the system further comprising:
a device (5n) configured to determine a value of a reflected power Pr, and a value of an incident power Pi in the power stage,
an analogue device (6n) configured to generate a voltage that is an image of a power ratio of the incident power Pi and the reflected power Pr, and to pulse width-modulate said voltage that is an image of the power ratio, thereby providing a low-power signal PWM,
a switching cell (7n) configured to receive said low-power signal PWM and to generate a power signal PWMa by amplifying the low-power signal,
a low-pass filter (81) configured to transform said power signal PWMa into a bias signal for biasing the power stage in accordance with a predefined bias control law.