The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications
This paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) of the output signal, and on linearity of the gain control. The presented circ...
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| Format: | Article |
| Language: | English |
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MDPI AG
2020-08-01
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| Series: | Sensors |
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| Online Access: | https://www.mdpi.com/1424-8220/20/16/4653 |
| _version_ | 1827708999949090816 |
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| author | Roman Prokop Roman Sotner Vilem Kledrowetz |
| author_facet | Roman Prokop Roman Sotner Vilem Kledrowetz |
| author_sort | Roman Prokop |
| collection | DOAJ |
| description | This paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) of the output signal, and on linearity of the gain control. The presented circuit is characterized by low input and high output impedances. Current consumption is significantly smaller than with conventional quadratic current multipliers and is comparable in order to the maximum processed input current, which is ±200 µA. This circuit is supposed to be used in many sensor applications, as well as a precise current multiplier for general analog current signal processing. The presented amplifier (current multiplier) was designed by an uncommon topology based on linear sub-blocks using MOS transistors working in their linear region. The described circuit was designed and fabricated in a C035 I3T25 0.35-µm ON Semiconductor process because of the demand of the intended application for higher supply voltage. Nevertheless, the topology is suitable also for modern smaller CMOS technologies and lower supply voltages. The performance of the circuit was verified by laboratory measurement with parameters comparable to the Cadence simulation results and presented here. |
| first_indexed | 2024-03-10T17:14:49Z |
| format | Article |
| id | doaj.art-01322fc0d0b74772a5a68856313506e6 |
| institution | Directory Open Access Journal |
| issn | 1424-8220 |
| language | English |
| last_indexed | 2024-03-10T17:14:49Z |
| publishDate | 2020-08-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Sensors |
| spelling | doaj.art-01322fc0d0b74772a5a68856313506e62023-11-20T10:31:55ZengMDPI AGSensors1424-82202020-08-012016465310.3390/s20164653The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement ApplicationsRoman Prokop0Roman Sotner1Vilem Kledrowetz2Department of Microelectronics, Brno University of Technology (BUT), Technicka 3058/10, 61600 Brno, Czech RepublicDepartment of Radio Electronics, Brno University of Technology (BUT), Technicka 3082/12, 61600 Brno, Czech RepublicDepartment of Microelectronics, Brno University of Technology (BUT), Technicka 3058/10, 61600 Brno, Czech RepublicThis paper introduces a new current-controlled current-amplifier suitable for precise measurement applications. This amplifier was developed with strong emphasis on linearity leading to low total harmonic distortion (THD) of the output signal, and on linearity of the gain control. The presented circuit is characterized by low input and high output impedances. Current consumption is significantly smaller than with conventional quadratic current multipliers and is comparable in order to the maximum processed input current, which is ±200 µA. This circuit is supposed to be used in many sensor applications, as well as a precise current multiplier for general analog current signal processing. The presented amplifier (current multiplier) was designed by an uncommon topology based on linear sub-blocks using MOS transistors working in their linear region. The described circuit was designed and fabricated in a C035 I3T25 0.35-µm ON Semiconductor process because of the demand of the intended application for higher supply voltage. Nevertheless, the topology is suitable also for modern smaller CMOS technologies and lower supply voltages. The performance of the circuit was verified by laboratory measurement with parameters comparable to the Cadence simulation results and presented here.https://www.mdpi.com/1424-8220/20/16/4653current amplifiercurrent controlled gainaccuracylinearityCMOSelectronic control |
| spellingShingle | Roman Prokop Roman Sotner Vilem Kledrowetz The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications Sensors current amplifier current controlled gain accuracy linearity CMOS electronic control |
| title | The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications |
| title_full | The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications |
| title_fullStr | The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications |
| title_full_unstemmed | The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications |
| title_short | The CMOS Highly Linear Current Amplifier with Current Controlled Gain for Sensor Measurement Applications |
| title_sort | cmos highly linear current amplifier with current controlled gain for sensor measurement applications |
| topic | current amplifier current controlled gain accuracy linearity CMOS electronic control |
| url | https://www.mdpi.com/1424-8220/20/16/4653 |
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