公开(公告)号：US20240230815A1

公开(公告)日：2024-07-11

申请号：US18478384

申请日：2023-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rushil KISHORE KUMAR ,  Jasjot Singh CHADHA ,  Atul AGRAWAL ,  Anand KANNAN ,  Nikhil GOYAL

IPC: G01R35/00 ,  G01R19/25

CPC classification number: G01R35/005 ,  G01R19/25 ,  H04R29/001

Abstract: A circuit includes: a driver circuit; a sense resistor; a test circuit; a current sense circuit; a calibration controller; and a switch controller. The current sense circuit is configured to: obtain first sense signals responsive to a test voltage applied to the sense resistor by the test circuit, the test voltage being a direct-circuit voltage; and obtain second sense signals responsive a supply voltage applied to the sense resistor by the driver circuit, the supply voltage including a common-mode voltage. The calibration controller is configured to calibrate the current sense circuit responsive to the first sense signals and the second sense signals. The switch controller is configured to update switch control signals provided to the driver circuit responsive to current sense signals obtained by the calibrated current sense circuit.