论文部分内容阅读
提出了一种新的曲率补偿带隙基准电路,首先通过一个双差分输入放大器(DDIA)来产生一个绝对温度互补电压。然后通过这个电压与另一个DDIA对曲率补偿进行微调,得到一个高阶曲率补偿的带隙基准电压。采用0.5μm CMOS工艺技术对文中所设计的电路进行流片验证,得到在-40~125℃内,带隙基准电压源的温度系数为4.1×10-6/℃,当电源电压在2.7~5 V时,带隙基准电路的输出电压稳定在1.3 V左右。此外,该电路具有较高的电源抑制比(PSRR),当频率小于1 k Hz时,其电源抑制比为-82 d B,而当频率在10 k Hz时,其电源抑制比为-75 d B。
A new curvature-compensated bandgap reference circuit is proposed by first generating an absolute temperature complementary voltage through a dual differential input amplifier (DDIA). This voltage is then used to fine tune the curvature compensation with another DDIA, resulting in a higher-order curvature-compensated bandgap reference. 0.5μm CMOS technology was used to verify the design of the circuit. The temperature coefficient of the bandgap reference voltage was 4.1 × 10-6 / ℃ within the range of -40 ~ 125 ℃. When the power supply voltage was between 2.7 ~ 5 V, the output voltage of the bandgap reference circuit is stable at around 1.3V. In addition, the circuit has a high power supply rejection ratio (PSRR), which provides a power supply rejection ratio of -82 d B at frequencies less than 1 k Hz and -75 d at 10 k Hz B.