Academic Journal
أعرض في EDS

CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface

التفاصيل البيبلوغرافية
العنوان: CMOS Current Feedback Operational Amplifier-Based Relaxation Generator for Capacity to Voltage Sensor Interface
المؤلفون: Ladislav Polak, Roman Sotner, Jiri Petrzela, Jan Jerabek
المصدر: Sensors, Vol 18, Iss 12, p 4488 (2018)
بيانات النشر: MDPI AG, 2018.
سنة النشر: 2018
المجموعة: LCC:Chemical technology
مصطلحات موضوعية: capacity sensor interface, capacity measurement, current feedback operational amplifier, relaxation generator, square wave generator, Chemical technology, TP1-1185
الوصف: This paper presents a simple relaxation generator, suitable for a sensor interface, operating as a transducer of capacitance to frequency/period. The proposed circuit employs a current feedback operational amplifier, fabricated in I3T25 0.35 μ m ON Semiconductor CMOS process, and four passive elements including a grounded capacitor (the sensed parameter). It offers a low-impedance voltage output of the generated square wave. Additional frequency to DC voltage converter offers output information in the form of voltage. The experimental capacitance variation from 6.8 nF to 100 nF yields voltage change in the range from 21 mV to 106 mV with error below 5% and sensitivity 0.912 mV/nF evaluated over the full range of change. These values are in good agreement with simulation results obtained from the Mathcad model of frequency to DC voltage transducer passive circuit.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1424-8220
18124488
Relation: https://www.mdpi.com/1424-8220/18/12/4488; https://doaj.org/toc/1424-8220
DOI: 10.3390/s18124488
URL الوصول: https://doaj.org/article/7468f379e2e04d5dbe69bf64a01cb9a0
رقم الانضمام: edsdoj.7468f379e2e04d5dbe69bf64a01cb9a0
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:14248220
18124488
DOI:10.3390/s18124488