公开(公告)号：US20200033398A1

公开(公告)日：2020-01-30

申请号：US16584212

申请日：2019-09-26

Applicant: Analog Devices Global

Inventor： GuangYang Qu ,  Yincai Tony Liu ,  Baotain Hao ,  Hanqing Wang ,  Hengfang Mei ,  Rengui Luo ,  Yimiao Zhao ,  Junbiao Ding

IPC: G01R31/28 ,  G01R27/02 ,  G01R27/16 ,  G01R35/00 ,  G01N27/416 ,  G01N33/00

Abstract: An apparatus comprises a load resistance connectable in series with the electronic sensor to form a series resistance of the load resistance and the internal impedance of the electronic sensor; an excitation circuit configured to apply a predetermined voltage to a circuit element; and a measurement circuit configured to: initiate applying the predetermined voltage to the series resistance and determining the series resistance; initiate applying the predetermined voltage to the load resistance and determining the load resistance; and calculate the internal impedance of the sensor using the determined series resistance and the load resistance, and provide the calculated internal impedance to a user or process.