| Issue |
MATEC Web Conf.
Volume 201, 2018
2017 The 3rd International Conference on Inventions (ICI 2017)
|
|
|---|---|---|
| Article Number | 02002 | |
| Number of page(s) | 6 | |
| Section | Invention of electrical engineering system | |
| DOI | https://doi.org/10.1051/matecconf/201820102002 | |
| Published online | 14 September 2018 | |
None Operational Amplifier (OPA) Based: Design of Analogous Bandgap Reference Voltage
Department of Electronic Engineering, National Chin-Yi University of Technology, Taiwan (ROC)
* Corresponding author: ychung@ncut.edu.tw
By using 0.35-um CMOS process, this work achieves a design of analogous band-gap reference voltage circuit with low temperature coefficient. The proposed circuit operates at 3V and generates a reference current of 44 uA. The HSPICE simulation results show the temperature coefficient of this circuit is 23 ppm/°C at range of -10 °C to 100 °C, and the line regulation (the ratio of output current variation to supply voltage variation) is estimated as 1.95 uA/V from supply voltage variation of 3 V to 5 V. The experimental chip is fabricated and measured. The circuit provides adjustable capability for output voltage among temperature variation of -10 - 100 °C. The chip area is 534 × 695 um2. In this new design, the operational amplifier is not necessary. The chip design effort can be great reduced.
© The Authors, published by EDP Sciences, 2018
This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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