公开(公告)号：US11047946B2

公开(公告)日：2021-06-29

申请号：US15974271

申请日：2018-05-08

Applicant: QUALCOMM Incorporated

Inventor： Nam Dang ,  Rajeev Jain ,  Swarna Navubothu ,  Alan Lewis ,  Martin Saint-Laurent ,  Tung Nang Pham ,  Joseph Terregrossa ,  Paras Gupta ,  Somasekhar Maradani

IPC: G01R35/00 ,  G01R19/25 ,  H03K5/003

Abstract: Aspects of the disclosure are directed to voltage-based current sensing. In accordance with one aspect, voltage-based current sensing may include performing a coarse calibration of a voltage based current sensor to determine a coarse offset; performing a fine calibration of the voltage based current sensor to determine a fine offset; performing a frequency calibration of the voltage based current sensor to determine a frequency offset; and performing a transfer function calibration of the voltage based current sensor to determine a sensor transfer function using one or more of the coarse offset, the fine offset and the frequency offset; and measuring a load current using the sensor transfer function.