中圖分類(lèi)號(hào)：TN433
文獻(xiàn)標(biāo)志碼：A
DOI:10.16157/j.issn.0258-7998.222872
中文引用格式： 徐晴昊，奚冬杰. 基于CMOS閾值電壓設(shè)計(jì)的電壓基準(zhǔn)源[J]. 電子技術(shù)應(yīng)用，2023，49(1)：32-35.
英文引用格式： Xu Qinghao，Xi Dongjie. Voltage reference based on CMOS threshold voltage[J]. Application of Electronic Technique，2023，49(1)：32-35.

Voltage reference based on CMOS threshold voltage

Abstract： A novel low temperature coefficient voltage referece without resistors is presented in this brief, which is compatible with standard TSMC 0.18 µm CMOS technology. Threshold voltage (Vth) and proportional to absolute temperature voltage (VPTAT) form the basic linear temperature components. By weighting the sum of the two through asymmetric differential operational amplifier, the nonlinearity in the voltage reference is cancled and the precision of the output voltage is improved. The Vth is achieved by resistorless circuit and the VPTAT is achieved by asymmetric differential operational amplifier. The experimental results show that in the temperature range of -55 ℃ to 125 ℃, the voltage reference is 1.23 V with a temperature coefficient of 4.5 ppm/℃, and the power supply rejection ratio is lower than -93 dB while without filtering capacitor.

Key words : voltage reference；threshold voltage；temperature coefficient；PSRR