Low Temperature-Coefficient Reference Voltage
| Autor: | Yi-Ping Wu, 吳一平 |
|---|---|
| Rok vydání: | 2015 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 103 This thesis is related to the design of cascade low temperature-coefficient reference voltage. The design principle is using both the positive and the negative temperature-coefficient parameters in BJT to compensate each other, and then a zero temperature-coefficient output reference voltage can be achieved. Two different circuit architectures have been simulated and discussed. As compared with the existed reference voltage circuits, the proposed circuits benefit from simpler circuit architecture, less chip area, and also there are no operational amplifiers included in the proposed circuits. Detailed design principle has been disclosed in this thesis, and the HSPICE and LAKER simulation programs with 0.35-μm process parameters have been used to perform the layout and implement the circuits. According to the post-layout simulation results, where the supply voltage is 5V and the temperature ranges from -20°C-120°C, after first order temperature-compensation, as the output reference voltage is 3.014V, the maximum output voltage variation is 2.568mV, and when the output reference voltage is 2.495V, the maximum output voltage variation is 1.772mV, and finally if the output reference voltage is 1.249V, the maximum output voltage variation is 1.192mV. The corresponding power dissipation is 0.891mW. After second order temperature-compensation, the output reference voltage can be 2.489V with the maximum output voltage variation of only 1.127mV, and 1.127V with the maximum output voltage variation of 0.589mV. The corresponding power dissipation is 0.954mW. All the simulation results are consistent with the theoretic analysis. The proposed low temperature-coefficient reference voltage circuits can be applied to vehicle electronic devices design and other digital and analog circuits. Keywords: temperature coefficient, cascode, current mirror, reference voltage. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
| Externí odkaz: |
|