Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit
This paper reports on noise modeling of a piezoelectric charge accelerometer with a signal conditioning circuit. The charge output is converted into voltage and amplified using a JFET operational amplifier that has high input resistance and low noise. The noise sources in the whole system include el...
| Main Authors: | , |
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| Format: | Article |
| Language: | English |
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MDPI AG
2024-02-01
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| Series: | Micromachines |
| Subjects: | |
| Online Access: | https://www.mdpi.com/2072-666X/15/2/283 |
| _version_ | 1827343148409421824 |
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| author | Ghulam Ali Faisal Mohd-Yasin |
| author_facet | Ghulam Ali Faisal Mohd-Yasin |
| author_sort | Ghulam Ali |
| collection | DOAJ |
| description | This paper reports on noise modeling of a piezoelectric charge accelerometer with a signal conditioning circuit. The charge output is converted into voltage and amplified using a JFET operational amplifier that has high input resistance and low noise. The noise sources in the whole system include electrical and mechanical thermal noises of the accelerometer, thermal noises of resistors, and voltage and current noises of the operational amplifier. Noise gain of each source is derived from small signal circuit analysis. It is found that the feedback resistor of the operational amplifier is a major source of noise in low frequencies, whereas electrical thermal noise of the accelerometer dominates the rest of spectrum. This method can be used to pair a highly sensitive sensor with a single JFET operational amplifier instead of a multi-stage signal conditioning circuit. |
| first_indexed | 2024-03-07T22:21:01Z |
| format | Article |
| id | doaj.art-8e31668e7d6745eb95d5d4048ca90da1 |
| institution | Directory Open Access Journal |
| issn | 2072-666X |
| language | English |
| last_indexed | 2024-03-07T22:21:01Z |
| publishDate | 2024-02-01 |
| publisher | MDPI AG |
| record_format | Article |
| series | Micromachines |
| spelling | doaj.art-8e31668e7d6745eb95d5d4048ca90da12024-02-23T15:27:54ZengMDPI AGMicromachines2072-666X2024-02-0115228310.3390/mi15020283Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning CircuitGhulam Ali0Faisal Mohd-Yasin1School of Engineering and Built Environment, Griffith University, Nathan, QLD 4111, AustraliaSchool of Engineering and Built Environment, Griffith University, Nathan, QLD 4111, AustraliaThis paper reports on noise modeling of a piezoelectric charge accelerometer with a signal conditioning circuit. The charge output is converted into voltage and amplified using a JFET operational amplifier that has high input resistance and low noise. The noise sources in the whole system include electrical and mechanical thermal noises of the accelerometer, thermal noises of resistors, and voltage and current noises of the operational amplifier. Noise gain of each source is derived from small signal circuit analysis. It is found that the feedback resistor of the operational amplifier is a major source of noise in low frequencies, whereas electrical thermal noise of the accelerometer dominates the rest of spectrum. This method can be used to pair a highly sensitive sensor with a single JFET operational amplifier instead of a multi-stage signal conditioning circuit.https://www.mdpi.com/2072-666X/15/2/283noisemodelingpiezoelectricaccelerometercharge amplifier |
| spellingShingle | Ghulam Ali Faisal Mohd-Yasin Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit Micromachines noise modeling piezoelectric accelerometer charge amplifier |
| title | Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit |
| title_full | Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit |
| title_fullStr | Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit |
| title_full_unstemmed | Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit |
| title_short | Comprehensive Noise Modeling of Piezoelectric Charge Accelerometer with Signal Conditioning Circuit |
| title_sort | comprehensive noise modeling of piezoelectric charge accelerometer with signal conditioning circuit |
| topic | noise modeling piezoelectric accelerometer charge amplifier |
| url | https://www.mdpi.com/2072-666X/15/2/283 |
| work_keys_str_mv | AT ghulamali comprehensivenoisemodelingofpiezoelectricchargeaccelerometerwithsignalconditioningcircuit AT faisalmohdyasin comprehensivenoisemodelingofpiezoelectricchargeaccelerometerwithsignalconditioningcircuit |