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.

公开(公告)号：US20240230737A1

公开(公告)日：2024-07-11

申请号：US18478431

申请日：2023-09-29

Applicant: TEXAS INSTRUMENTS INCORPORATED

Inventor： Rushil KISHORE KUMAR ,  Jasjot Singh CHADHA

IPC: G01R27/14 ,  H03K17/687

CPC classification number: G01R27/14 ,  H03K17/6871

Abstract: A system includes: a drift sense circuit; and a driver calibration controller. The drift sense circuit has an input terminal, an output terminal, and a ground terminal. The drift sense circuit includes: a resistor having a first terminal and a second terminal, the first terminal of the resistor coupled to the input terminal; and a reference component having a first terminal and a second terminal, the second terminal of the reference component coupled to the ground terminal. The drift calibration controller is coupled to the output terminal of the drift sense circuit. The drift calibration controller is configured to: obtain a sense signal responsive to an input voltage applied to the input terminal; determine a drift result of the resistor responsive to the sense signal; and update a control operation responsive to the drift result.