Proposed wide dynamic-range controllable current sources
Generating ultra-low currents using resistors is impractical especially in integrated circuits due to the wasting of much area associated with the required very large resistors. In this paper, three ultra-low current sources that are suitable for biomedical and implantable applications are proposed....
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
| Published: |
Elsevier
2023-09-01
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| Series: | Ain Shams Engineering Journal |
| Subjects: | |
| Online Access: | http://www.sciencedirect.com/science/article/pii/S2090447923000163 |
| _version_ | 1797676327142162432 |
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| author | Sherif M. Sharroush Yasser S. Abdalla |
| author_facet | Sherif M. Sharroush Yasser S. Abdalla |
| author_sort | Sherif M. Sharroush |
| collection | DOAJ |
| description | Generating ultra-low currents using resistors is impractical especially in integrated circuits due to the wasting of much area associated with the required very large resistors. In this paper, three ultra-low current sources that are suitable for biomedical and implantable applications are proposed. The generated currents are in the nanoampere range. One of the proposed current sources depends on a modification of the conventional Widlar MOS current source in which a tunable subthreshold-region operated transistor is utilized as a controlled resistance. The proposed current source is suitable for low-voltage and low-power applications. Also, two digitally controlled current sources (DCCSs) are proposed. The DCCSs find a wide variety of applications in digital-to-analog converters, implantable microstimulators, and charge pumps. The three proposed current sources are analyzed quantitatively. They are also verified by simulation adopting the 45 nm CMOS Predictive Technology Model (PTM) with a power-supply voltage, VDD, equal to 1 V. |
| first_indexed | 2024-03-11T22:27:23Z |
| format | Article |
| id | doaj.art-f90358c465f147c28df2a874301a5a8b |
| institution | Directory Open Access Journal |
| issn | 2090-4479 |
| language | English |
| last_indexed | 2024-03-11T22:27:23Z |
| publishDate | 2023-09-01 |
| publisher | Elsevier |
| record_format | Article |
| series | Ain Shams Engineering Journal |
| spelling | doaj.art-f90358c465f147c28df2a874301a5a8b2023-09-24T05:14:52ZengElsevierAin Shams Engineering Journal2090-44792023-09-01149102127Proposed wide dynamic-range controllable current sourcesSherif M. Sharroush0Yasser S. Abdalla1Department of Electrical Engineering, Faculty of Engineering, Port Said University, Port Said, Egypt; Corresponding author.Department of Computer Engineering and Networks, College of Computer and Information Sciences, Jouf University and Faculty of Technology and Education, Suez University, EgyptGenerating ultra-low currents using resistors is impractical especially in integrated circuits due to the wasting of much area associated with the required very large resistors. In this paper, three ultra-low current sources that are suitable for biomedical and implantable applications are proposed. The generated currents are in the nanoampere range. One of the proposed current sources depends on a modification of the conventional Widlar MOS current source in which a tunable subthreshold-region operated transistor is utilized as a controlled resistance. The proposed current source is suitable for low-voltage and low-power applications. Also, two digitally controlled current sources (DCCSs) are proposed. The DCCSs find a wide variety of applications in digital-to-analog converters, implantable microstimulators, and charge pumps. The three proposed current sources are analyzed quantitatively. They are also verified by simulation adopting the 45 nm CMOS Predictive Technology Model (PTM) with a power-supply voltage, VDD, equal to 1 V.http://www.sciencedirect.com/science/article/pii/S2090447923000163Analog CMOSCascode deviceTunable current sourceDynamic rangeIntegrated circuitsDigitally controlled current source |
| spellingShingle | Sherif M. Sharroush Yasser S. Abdalla Proposed wide dynamic-range controllable current sources Ain Shams Engineering Journal Analog CMOS Cascode device Tunable current source Dynamic range Integrated circuits Digitally controlled current source |
| title | Proposed wide dynamic-range controllable current sources |
| title_full | Proposed wide dynamic-range controllable current sources |
| title_fullStr | Proposed wide dynamic-range controllable current sources |
| title_full_unstemmed | Proposed wide dynamic-range controllable current sources |
| title_short | Proposed wide dynamic-range controllable current sources |
| title_sort | proposed wide dynamic range controllable current sources |
| topic | Analog CMOS Cascode device Tunable current source Dynamic range Integrated circuits Digitally controlled current source |
| url | http://www.sciencedirect.com/science/article/pii/S2090447923000163 |
| work_keys_str_mv | AT sherifmsharroush proposedwidedynamicrangecontrollablecurrentsources AT yassersabdalla proposedwidedynamicrangecontrollablecurrentsources |