公开(公告)号：US20230296651A1

公开(公告)日：2023-09-21

申请号：US18121695

申请日：2023-03-15

Applicant: STMicroelectronics (Grand Ouest) SAS

Inventor： Christophe BELET

IPC: G01R19/00 ,  H03F3/21 ,  G01R19/25

CPC classification number: G01R19/0023 ,  H03F3/211 ,  G01R19/2509

Abstract: Load current consumption measured using a first resistor having a high resistive value and a second resistor having a low resistive value. Differential amplifiers, the outputs of which are coupled to analog-to-digital converters and to a processing circuit unit, are connected to each of the nodes of the resistors. Depending on the current level, the processing circuit unit advantageously selects one of the analog-to-digital converters to estimate the present consumption of current in the load. Each input terminal of a resistor is advantageously power supplied from a power amplifier and each power amplifier is advantageously driven by a control loop. For low load currents, the first amplifier associated with the first resistor power supplies the load through the resistors while, for high load currents, when this first amplifier saturates, the second amplifier associated with the second resistor, takes over from the first amplifier to continue to power supply the load.