Delta-sigma modulator based compact sensor signal acquisition front-end system
The proposed delta-sigma modulator (△ΣM) based signal acquisition architecture uses a differential difference amplifier (DDA) customized for dual purpose roles, namely as instrumentation amplifier and as integrator of △ΣM. The DDA also provides balanced high input impedance for signal from sensors....
| Main Authors: | , |
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| Other Authors: | |
| Format: | Journal Article |
| Language: | English |
| Published: |
2021
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| Subjects: | |
| Online Access: | https://hdl.handle.net/10356/153965 |
| _version_ | 1811677931573870592 |
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| author | Basu, Joydeep Mandal, Pradip |
| author2 | School of Electrical and Electronic Engineering |
| author_facet | School of Electrical and Electronic Engineering Basu, Joydeep Mandal, Pradip |
| author_sort | Basu, Joydeep |
| collection | NTU |
| description | The proposed delta-sigma modulator (△ΣM) based signal acquisition architecture uses a differential difference amplifier (DDA) customized for dual purpose roles, namely as instrumentation amplifier and as integrator of △ΣM. The DDA also provides balanced high input impedance for signal from sensors. Further, programmable input amplification is obtained by
adjustment of △ΣM feedback voltage. Implementation of other functionalities, such as filtering and digitization have also been incorporated. At circuit level, a difference of transconductance of DDA input pairs has been proposed to reduce the effect of input resistor thermal noise of
front-end R-C integrator of the △ΣM. Besides, chopping has been used for minimizing effect of Flicker noise. The resulting architecture is an aggregation of functions of entire signal acquisition system within the single block of △ΣM, and is useful for a multitude of dc-to-medium frequency sensing and similar applications that require high precision at reduced size and power. An implementation of this in 0.18-μm CMOS process has been presented, yielding a simulated peak signal-to-noise ratio of 80 dB and dynamic range of 109 dBFS in an input signal band of 1 kHz while consuming 100 μW of power; with the measured signal-to-noise ratio being lower by
about 9 dB. |
| first_indexed | 2024-10-01T02:45:12Z |
| format | Journal Article |
| id | ntu-10356/153965 |
| institution | Nanyang Technological University |
| language | English |
| last_indexed | 2024-10-01T02:45:12Z |
| publishDate | 2021 |
| record_format | dspace |
| spelling | ntu-10356/1539652021-12-13T07:39:19Z Delta-sigma modulator based compact sensor signal acquisition front-end system Basu, Joydeep Mandal, Pradip School of Electrical and Electronic Engineering Engineering::Electrical and electronic engineering Physics - Instrumentation and Detectors Analog Front-End Analog to Digital Conversion ADC The proposed delta-sigma modulator (△ΣM) based signal acquisition architecture uses a differential difference amplifier (DDA) customized for dual purpose roles, namely as instrumentation amplifier and as integrator of △ΣM. The DDA also provides balanced high input impedance for signal from sensors. Further, programmable input amplification is obtained by adjustment of △ΣM feedback voltage. Implementation of other functionalities, such as filtering and digitization have also been incorporated. At circuit level, a difference of transconductance of DDA input pairs has been proposed to reduce the effect of input resistor thermal noise of front-end R-C integrator of the △ΣM. Besides, chopping has been used for minimizing effect of Flicker noise. The resulting architecture is an aggregation of functions of entire signal acquisition system within the single block of △ΣM, and is useful for a multitude of dc-to-medium frequency sensing and similar applications that require high precision at reduced size and power. An implementation of this in 0.18-μm CMOS process has been presented, yielding a simulated peak signal-to-noise ratio of 80 dB and dynamic range of 109 dBFS in an input signal band of 1 kHz while consuming 100 μW of power; with the measured signal-to-noise ratio being lower by about 9 dB. 2021-12-13T07:39:18Z 2021-12-13T07:39:18Z 2020 Journal Article Basu, J. & Mandal, P. (2020). Delta-sigma modulator based compact sensor signal acquisition front-end system. Microelectronics Journal, 98, 104732-. https://dx.doi.org/10.1016/j.mejo.2020.104732 0026-2692 https://hdl.handle.net/10356/153965 10.1016/j.mejo.2020.104732 2-s2.0-85080999407 98 104732 en Microelectronics Journal © 2020 Elsevier Ltd. All rights reserved. |
| spellingShingle | Engineering::Electrical and electronic engineering Physics - Instrumentation and Detectors Analog Front-End Analog to Digital Conversion ADC Basu, Joydeep Mandal, Pradip Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title | Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title_full | Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title_fullStr | Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title_full_unstemmed | Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title_short | Delta-sigma modulator based compact sensor signal acquisition front-end system |
| title_sort | delta sigma modulator based compact sensor signal acquisition front end system |
| topic | Engineering::Electrical and electronic engineering Physics - Instrumentation and Detectors Analog Front-End Analog to Digital Conversion ADC |
| url | https://hdl.handle.net/10356/153965 |
| work_keys_str_mv | AT basujoydeep deltasigmamodulatorbasedcompactsensorsignalacquisitionfrontendsystem AT mandalpradip deltasigmamodulatorbasedcompactsensorsignalacquisitionfrontendsystem |