کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
6879034 | 1443107 | 2018 | 31 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
High-precision, resistor less gas pressure sensor and instrumentation amplifier in CNT technology
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی کامپیوتر
شبکه های کامپیوتری و ارتباطات
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چکیده انگلیسی
In this paper, a new high-precision, pressure sensor for sensing gas molecules using a controllable voltage-mode instrumentation amplifier (VMIA) in carbon nanotube field-effect transistor (CNTFET) technology is designed. The sensing mechanism is based on the applied force by Oxygen atoms on the surface of the carbon nanotube (CNT), which is considered as a movable electrode of sensing capacitor. The sensing mechanism is simulated in ANSYS which justifies the variations of sensing capacitance, while the sensor's output voltage is applied to an accurate instrumentation amplifier (IA) via a switched-capacitor sensor driver. Therefore, due to the controllability of the transconductance and gain parameters of a CNTFET, the IA circuit provides a constant and controllable differential gain of up to 52â¯dB in a flat â3dB bandwidth of up to 3.6â¯MHz, which provides a tunable common-mode rejection ratio (CMRR) of up to 121â¯dB in a 1.8â¯GHz flat, â3dB frequency bandwidth. Moreover, due to the use of the differential pair stage, the total harmonic distortion (THD) value is obtained less than 0.67%. Finally, the proposed IA circuit consumes only 45.1â¯ÂµW with a 22.52â¯nV/âHz equivalent input referred noise value at ±0.5â¯V supply.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: AEU - International Journal of Electronics and Communications - Volume 93, September 2018, Pages 325-336
Journal: AEU - International Journal of Electronics and Communications - Volume 93, September 2018, Pages 325-336
نویسندگان
S. Mohammad Ali Zanjani, Massoud Dousti, Mehdi Dolatshahi,