连续输出全集成开关电容带隙基准电路  

Fully Integrated Switched-Capacitor Fractional Bandgap Reference Circuit With Continuous Output

作　　者：许天辉[1] 明鑫[1] 周泽坤[1] 张波[1] 

机构地区：[1]电子科技大学电子薄膜与集成器件国家重点实验室,四川成都610054

出　　处：《中国集成电路》2014年第4期42-47,共6页China lntegrated Circuit

基　　金：国家自然科学基金(项目编号:61306035);电子科技大学中央高校基本科研业务费项目(项目编号:ZYGX2013J031)

摘　　要：本文提出了一种新型的开关电容带隙基准电路。电路采用双通道开关电容求和电路,能够连续输出基准电压,同时采用输出缓冲电路降低电压过冲,无需片外滤波电容。本设计采用NEC 0.35μm CMOS工艺,使用Hspice仿真软件对电路进行仿真。仿真结果表明:在典型参数情况下,该电路能够连续输出过冲为50μV的基准电压,在-20℃～80℃范围内,其输出电压的温度系数为15.4ppm/℃。A kind of novel Switched-Capacitor Fractional Bandgap Reference Circuit was proposed in this paper. This circuit use double-channel Switched-Capacitor summation circuit to provide a continuous voltage reference, and use output buffer circuit to reduce the amount spikes during switching which makes it no need for Off-chip filter ca- pacitance. The circuit is simulated with NEC 0.35 IX m BCD process using Hspiee. The results indicate that the circuit can realize continuous output voltage with 50 u V spike voltage, and the temperature coefficient within temperature range -20℃ to 80℃ is 15.4ppm/℃.

关 键 词：开关电容 电压基准 连续输出 全集成 

分 类 号：TN432[电子电信—微电子学与固体电子学]