The Experts below are selected from a list of 324 Experts worldwide ranked by ideXlab platform
Michael R Winchester - One of the best experts on this subject based on the ideXlab platform.
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Impact of and correction for instrument Sensitivity Drift on nanoparticle size measurements by single-particle ICP-MS
Analytical and Bioanalytical Chemistry, 2016Co-Authors: Hind El Hadri, Elijah J Petersen, Michael R WinchesterAbstract:The effect of ICP-MS instrument Sensitivity Drift on the accuracy of nanoparticle (NP) size measurements using single particle (sp)ICP-MS is investigated. Theoretical modeling and experimental measurements of the impact of instrument Sensitivity Drift are in agreement and indicate that Drift can impact the measured size of spherical NPs by up to 25 %. Given this substantial bias in the measured size, a method was developed using an internal standard to correct for the impact of Drift and was shown to accurately correct for a decrease in instrument Sensitivity of up to 50 % for 30 and 60 nm gold nanoparticles. Graphical Abstract Correction of nanoparticle size measurement by spICP-MS using an internal standard
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impact of and correction for instrument Sensitivity Drift on nanoparticle size measurements by single particle icp ms
Analytical and Bioanalytical Chemistry, 2016Co-Authors: Hind El Hadri, Elijah J Petersen, Michael R WinchesterAbstract:The effect of ICP-MS instrument Sensitivity Drift on the accuracy of nanoparticle (NP) size measurements using single particle (sp)ICP-MS is investigated. Theoretical modeling and experimental measurements of the impact of instrument Sensitivity Drift are in agreement and indicate that Drift can impact the measured size of spherical NPs by up to 25 %. Given this substantial bias in the measured size, a method was developed using an internal standard to correct for the impact of Drift and was shown to accurately correct for a decrease in instrument Sensitivity of up to 50 % for 30 and 60 nm gold nanoparticles.
Kofi Makinwa - One of the best experts on this subject based on the ideXlab platform.
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a hybrid multi path cmos magnetic sensor with 76 ppm c Sensitivity Drift and discrete time ripple reduction loops
IEEE Journal of Solid-state Circuits, 2017Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The Hall sensors and pick-up coils are used in a differential sensing arrangement that naturally rejects common-mode magnetic field interference, e.g., due to the earth’s magnetic field. A common-mode ac reference field can then be used to continuously stabilize the Sensitivity of the Hall sensors, which, unlike that of the pick-up coils, is quite temperature dependent. In this design, the ripple reduction loops in the Hall sensor readout are implemented in a discrete-time manner, and so occupy 20% less area than a previous continuous-time implementation. Over a −45 °C to 105 °C temperature range, the proposed system reduces the Hall sensor Drift from 22% to 1%, which corresponds to a temperature coefficient of 76 ppm/°C.
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A Hybrid Multi-Path CMOS Magnetic Sensor With 76 ppm/°C Sensitivity Drift and Discrete-Time Ripple Reduction Loops
IEEE Journal of Solid-State Circuits, 2017Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The Hall sensors and pick-up coils are used in a differential sensing arrangement that naturally rejects common-mode magnetic field interference, e.g., due to the earth's magnetic field. A common-mode ac reference field can then be used to continuously stabilize the Sensitivity of the Hall sensors, which, unlike that of the pick-up coils, is quite temperature dependent. In this design, the ripple reduction loops in the Hall sensor readout are implemented in a discrete-time manner, and so occupy 20% less area than a previous continuous-time implementation. Over a -45 °C to 105 °C temperature range, the proposed system reduces the Hall sensor Drift from 22% to 1%, which corresponds to a temperature coefficient of 76 ppm/°C.
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ESSCIRC - A hybrid multi-path CMOS magnetic sensor with 76 ppm/°C Sensitivity Drift
ESSCIRC Conference 2016: 42nd European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multi-path combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC common-mode field. In a test chip fabricated in a 0.18 µm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from −45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
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a hybrid multi path cmos magnetic sensor with 76 ppm c Sensitivity Drift
European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multi-path combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC common-mode field. In a test chip fabricated in a 0.18 µm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from −45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
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A hybrid multi-path CMOS magnetic sensor with 76 ppm/°C Sensitivity Drift
ESSCIRC Conference 2016: 42nd European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multipath combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC commonmode field. In a test chip fabricated in a 0.18 μm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from -45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
Hind El Hadri - One of the best experts on this subject based on the ideXlab platform.
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Impact of and correction for instrument Sensitivity Drift on nanoparticle size measurements by single-particle ICP-MS
Analytical and Bioanalytical Chemistry, 2016Co-Authors: Hind El Hadri, Elijah J Petersen, Michael R WinchesterAbstract:The effect of ICP-MS instrument Sensitivity Drift on the accuracy of nanoparticle (NP) size measurements using single particle (sp)ICP-MS is investigated. Theoretical modeling and experimental measurements of the impact of instrument Sensitivity Drift are in agreement and indicate that Drift can impact the measured size of spherical NPs by up to 25 %. Given this substantial bias in the measured size, a method was developed using an internal standard to correct for the impact of Drift and was shown to accurately correct for a decrease in instrument Sensitivity of up to 50 % for 30 and 60 nm gold nanoparticles. Graphical Abstract Correction of nanoparticle size measurement by spICP-MS using an internal standard
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impact of and correction for instrument Sensitivity Drift on nanoparticle size measurements by single particle icp ms
Analytical and Bioanalytical Chemistry, 2016Co-Authors: Hind El Hadri, Elijah J Petersen, Michael R WinchesterAbstract:The effect of ICP-MS instrument Sensitivity Drift on the accuracy of nanoparticle (NP) size measurements using single particle (sp)ICP-MS is investigated. Theoretical modeling and experimental measurements of the impact of instrument Sensitivity Drift are in agreement and indicate that Drift can impact the measured size of spherical NPs by up to 25 %. Given this substantial bias in the measured size, a method was developed using an internal standard to correct for the impact of Drift and was shown to accurately correct for a decrease in instrument Sensitivity of up to 50 % for 30 and 60 nm gold nanoparticles.
Junfeng Jiang - One of the best experts on this subject based on the ideXlab platform.
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a hybrid multi path cmos magnetic sensor with 76 ppm c Sensitivity Drift and discrete time ripple reduction loops
IEEE Journal of Solid-state Circuits, 2017Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The Hall sensors and pick-up coils are used in a differential sensing arrangement that naturally rejects common-mode magnetic field interference, e.g., due to the earth’s magnetic field. A common-mode ac reference field can then be used to continuously stabilize the Sensitivity of the Hall sensors, which, unlike that of the pick-up coils, is quite temperature dependent. In this design, the ripple reduction loops in the Hall sensor readout are implemented in a discrete-time manner, and so occupy 20% less area than a previous continuous-time implementation. Over a −45 °C to 105 °C temperature range, the proposed system reduces the Hall sensor Drift from 22% to 1%, which corresponds to a temperature coefficient of 76 ppm/°C.
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A Hybrid Multi-Path CMOS Magnetic Sensor With 76 ppm/°C Sensitivity Drift and Discrete-Time Ripple Reduction Loops
IEEE Journal of Solid-State Circuits, 2017Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-insensitive magnetic sensor system for contactless current measurements. To simultaneously achieve wide bandwidth and low noise, the proposed system employs a multi-path structure with a set of spinning current Hall sensors in its low-frequency path and a set of pick-up coils in its high-frequency path. The Hall sensors and pick-up coils are used in a differential sensing arrangement that naturally rejects common-mode magnetic field interference, e.g., due to the earth's magnetic field. A common-mode ac reference field can then be used to continuously stabilize the Sensitivity of the Hall sensors, which, unlike that of the pick-up coils, is quite temperature dependent. In this design, the ripple reduction loops in the Hall sensor readout are implemented in a discrete-time manner, and so occupy 20% less area than a previous continuous-time implementation. Over a -45 °C to 105 °C temperature range, the proposed system reduces the Hall sensor Drift from 22% to 1%, which corresponds to a temperature coefficient of 76 ppm/°C.
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ESSCIRC - A hybrid multi-path CMOS magnetic sensor with 76 ppm/°C Sensitivity Drift
ESSCIRC Conference 2016: 42nd European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multi-path combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC common-mode field. In a test chip fabricated in a 0.18 µm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from −45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
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a hybrid multi path cmos magnetic sensor with 76 ppm c Sensitivity Drift
European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multi-path combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC common-mode field. In a test chip fabricated in a 0.18 µm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from −45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
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A hybrid multi-path CMOS magnetic sensor with 76 ppm/°C Sensitivity Drift
ESSCIRC Conference 2016: 42nd European Solid-State Circuits Conference, 2016Co-Authors: Junfeng Jiang, Kofi MakinwaAbstract:This paper presents a temperature-stable system for wide-bandwidth contactless current sensing. It employs a multipath combination of Hall sensors (low frequencies) and coils (high frequencies) to sense the magnetic field produced by a current-carrying conductor under a chip. To cancel the effect of earth's common-mode field, a differential sensing arrangement is used. This is further exploited to stabilize the Hall sensor's temperature Drift with the help of a self-generated AC commonmode field. In a test chip fabricated in a 0.18 μm CMOS process, the stabilization scheme reduces the Hall sensor's Sensitivity Drift from 22% to 1% from -45°C to 105°C, corresponding to a temperature coefficient of 76 ppm/°C. The complete system has a bandwidth of 3 MHz, which represents a 10x improvement on previous low-Drift CMOS magnetic sensors.
Dacheng Xu - One of the best experts on this subject based on the ideXlab platform.
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A temperature compensation algorithm of piezoresistive pressure sensor and software implementation
2013 IEEE International Conference on Mechatronics and Automation, 2013Co-Authors: Dacheng XuAbstract:The thermal zero Drift and thermal Sensitivity Drift of piezoresistive pressure sensor plays a great role in the total error, so how to make this kind of error get effective compensation is significant for its performance. It is an effective method that establishing high-order temperature compensation model for silicon piezoresistive sensors and compensating temperature error, and put forward a fitting coefficient adjustment method on this model basis. The paper has been realized the calculation of temperature compensation by Matlab GUI. Experimental results show that nonlinearity error is less than 0.4% F.S.
