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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
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.
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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.
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公开(公告)号：US20180321349A1
公开(公告)日：2018-11-08
申请号：US15586877
申请日：2017-05-04
Applicant: Analog Devices Global
Inventor： GuangYang Qu , Leicheng Chen , Michael Looney
CPC classification number: G01R35/005 , G01R27/14
Abstract: The sensor interface IC measures or calibrates a target resistance to be used as a gain resistor for a TIA amplifier in the sensor interface IC. One or more excitation currents are generated in response to different specified excitation voltages that are applied to an external calibration resistor having a specified calibration resistance value. Response voltages are measured across the target resistor, respectively in response to the corresponding different one or more excitation currents. The resistance value of the target resistor is determined using a difference between the measured response voltages, a difference between the specified excitation voltages, and the specified calibration resistance value.
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Patent Agency Ranking
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
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.
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公开(公告)号：US10429483B2
公开(公告)日：2019-10-01
申请号：US15586877
申请日：2017-05-04
Applicant: Analog Devices Global
Inventor： GuangYang Qu , Leicheng Chen , Michael Looney
Abstract: The sensor interface IC measures or calibrates a target resistance to be used as a gain resistor for a TIA amplifier in the sensor interface IC. One or more excitation currents are generated in response to different specified excitation voltages that are applied to an external calibration resistor having a specified calibration resistance value. Response voltages are measured across the target resistor, respectively in response to the corresponding different one or more excitation currents. The resistance value of the target resistor is determined using a difference between the measured response voltages, a difference between the specified excitation voltages, and the specified calibration resistance value.
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公开(公告)号：US10782263B2
公开(公告)日：2020-09-22
申请号：US15586849
申请日：2017-05-04
Applicant: Analog Devices Global
Inventor： Michael Looney , GuangYang Qu
IPC: G01N27/416 , G01N27/12 , G01N27/404
Abstract: An impedance in an electrochemical gas sensor can be measured by connecting at least one pin in an integrated circuit to at least one electrode in an electrochemical gas sensor, using a damping capacitor to connect the at least one pin in the integrated circuit to an electrical ground, applying a voltage to the electrochemical gas sensor to provide a bias voltage to at least one electrode in the electrochemical gas sensor, receiving a current from at least one electrode in the electrochemical gas sensor, determining a measured gas amount from the received current, activating a switch located within the integrated circuit to isolate the damping capacitor from the at least one pin in the integrated circuit, and measuring an impedance of the electrochemical gas sensor using an excitation signal while the at least one damping capacitor is isolated from the at least one electrode in the electrochemical gas sensor.
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公开(公告)号：US20180321187A1
公开(公告)日：2018-11-08
申请号：US15586942
申请日：2017-05-04
Applicant: Analog Devices Global
Inventor： Shurong Gu , Hanqing Wang , GuangYang Qu , Dennis A. Dempsey
IPC: G01N27/416 , G01N27/48
CPC classification number: G01N27/4163 , G01N27/416
Abstract: Techniques for generating a diagnostic waveform for a sensor are provided. In an example, a control circuit for an electrochemical sensor can include power supply inputs configured to receive a supply voltage, a first signal generator configured to receive control information and to generate a first signal on a first output using the supply voltage and the control information, a second signal generator configured to receive the control information and to provide a second signal on a second output, using the supply voltage and the control information. An output voltage between the first output and the second output, in a diagnostic mode of operation of the control circuit, can include a periodic signal having a peak-to-peak voltage greater than the supply voltage.
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公开(公告)号：US09941894B1
公开(公告)日：2018-04-10
申请号：US15586848
申请日：2017-05-04
Applicant: Analog Devices Global
Inventor： Shurong Gu , Dennis A. Dempsey , GuangYang Qu , Hanqing Wang , Tony Yincai Liu
IPC: H03M1/66 , H03M1/08 , H03M1/00 , G01N27/416 , G01N33/00
CPC classification number: G01N33/004 , G01N27/4163 , H03M1/002 , H03M1/662 , H03M1/68 , H03M1/765
Abstract: A multiple output, multiple impedance string digital-to-analog converter (DAC) circuit can provide a first output having a first resolution in response to a first digital input signal and a second output having a second resolution in response to a second digital input signal. A main impedance string and a secondary impedance string can be coupled using switching networks to provide a first DAC output. By coupling additional switches to the main impedance string and by sharing the main impedance string, a second DAC output can be realized.
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