公开(公告)号：US20180321302A1

公开(公告)日：2018-11-08

申请号：US15586869

申请日：2017-05-04

Applicant: Analog Devices Global

Inventor： GuangYang Qu ,  Junbiao Ding ,  Tony Yincai Liu ,  Shurong Gu ,  Yimiao Zhao ,  Hanqing Wang ,  Leicheng Chen

IPC: G01R31/28 ,  G01R15/16

CPC classification number: G01R31/2829 ,  G01N27/416 ,  G01N27/4163 ,  G01N27/4175 ,  G01R15/16 ,  G01R27/02

Abstract: A electrochemical or other sensor interface circuit architecture can deliver substantial DC offset bias to an electrochemical or other sensor separately or independently from delivering a time-varying AC excitation signal, which can then be provided with higher resolution, which, in turn, can allow better resolution of the measured response signal providing the impedance characteristic of sensor condition. For example, a differential time-varying AC excitation signal for the sensor condition characteristic can be delivered separately and independently from a differential stable (e.g., DC or other) bias signal, such as by using separate digital-to-analog converters (DACs), so that providing the more stable signal does not limit the resolution and accuracy of the time-varying signal, such as by using up the dynamic range of a single DAC.

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.

公开(公告)号：US10466296B2

公开(公告)日：2019-11-05

申请号：US15433862

申请日：2017-02-15

Applicant: Analog Devices Global

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

IPC: G01R31/28 ,  G01N27/416 ,  G01N33/00 ,  G01R35/00 ,  G01R27/02 ,  G01R27/16 ,  G01N27/12

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.

公开(公告)号：US20180196101A1

公开(公告)日：2018-07-12

申请号：US15433862

申请日：2017-02-15

Applicant: Analog Devices Global

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

IPC: G01R31/28 ,  G01N27/416 ,  G01N27/12 ,  G01N33/00

CPC classification number: G01R31/2829 ,  G01N27/122 ,  G01N27/4163 ,  G01N33/0057 ,  G01R27/02 ,  G01R27/16 ,  G01R35/005

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.

公开(公告)号：US10288674B2

公开(公告)日：2019-05-14

申请号：US15586869

申请日：2017-05-04

Applicant: Analog Devices Global

Inventor： GuangYang Qu ,  Junbiao Ding ,  Tony Yincai Liu ,  Shurong Gu ,  Yimiao Zhao ,  Hanqing Wang ,  Leicheng Chen

IPC: G01R31/28 ,  G01R15/16 ,  G01R27/02 ,  G01N27/417 ,  G01N27/416

Abstract: A electrochemical or other sensor interface circuit architecture can deliver substantial DC offset bias to an electrochemical or other sensor separately or independently from delivering a time-varying AC excitation signal, which can then be provided with higher resolution, which, in turn, can allow better resolution of the measured response signal providing the impedance characteristic of sensor condition. For example, a differential time-varying AC excitation signal for the sensor condition characteristic can be delivered separately and independently from a differential stable (e.g., DC or other) bias signal, such as by using separate digital-to-analog converters (DACs), so that providing the more stable signal does not limit the resolution and accuracy of the time-varying signal, such as by using up the dynamic range of a single DAC.