A Highly Linear, Small-Area Analog Front End With Gain and Offset Compensation for Automotive Capacitive Pressure Sensors in 0.35- $\mu $ m CMOS
| Autor: | J.Y. Lee, Kang-Yoon Lee, YoungGun Pu, Honey Durga Tiwari, Munkyo Seo, Dong-Soo Lee, Hyung-Gu Park, Sang-Yun Kim |
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| Rok vydání: | 2015 |
| Předmět: |
Engineering
business.industry Capacitive sensing Electrical engineering Linearity Hardware_PERFORMANCEANDRELIABILITY Integrated circuit design Capacitance Pressure sensor Analog front-end CMOS Hardware_INTEGRATEDCIRCUITS Electronic engineering Electrical and Electronic Engineering business Instrumentation Voltage |
| Zdroj: | IEEE Sensors Journal. 15:1967-1976 |
| ISSN: | 1558-1748 1530-437X |
| DOI: | 10.1109/jsen.2014.2369471 |
| Popis: | This paper presents a highly linear, small-area analog front end with gain and offset compensation for automotive capacitive pressure sensor. We propose a capacitance-tovoltage converter circuit that measures the capacitance value of the capacitive sensor with the high accuracy and linearity. In this paper, the linearity of the analog front end is guaranteed using full-analog gain and an offset calibration circuit. The proposed design is implemented using CMOS 0.35 μm technology with an active area of 1.94 mm x 1.94 mm. The full output range is from 0.5 to 4.5 V. The ratiometricity is within ±0.7% when the supply voltage is changed by ±10%. The power consumption is 25 mW from a 5 V supply. The output accuracy is within ±1% with respect to Process, Voltage, Temperature variations. |
| Databáze: | OpenAIRE |
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