| 一种高阶补偿的开关电容带隙基准电路设计 |
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| 引用本文： | 陆婷,冯喆. 一种高阶补偿的开关电容带隙基准电路设计[J]. 微处理机, 2021, 0(1): 13-16 |
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| 作者姓名： | 陆婷 冯喆 |
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| 作者单位： | 中国电子科技集团公司第四十七研究所 |
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| 摘 要： | 介绍并设计一款具有高阶曲率补偿功能的开关电容式带隙基准电压源,采用自动调零技术,克服传统线性基准的失调缺陷,消除了失调电压的影响,提高了运放的输出精度.设计采用虚拟管,降低开关管关断时带来的寄生效应;通过架构引入高阶补偿项,使输出电压温度曲线为正弦型,显著降低了温度系数.电路在0.35μm标准CMOS工艺下实现,通过仿...
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| 关 键 词： | 带隙基准 自动调零 开关电容 消除失调 高阶补偿 |
Design of a Switched Capacitor Bandgap Reference Circuit with High Order Compensation |
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| LU Ting,FENG. Design of a Switched Capacitor Bandgap Reference Circuit with High Order Compensation[J]. Microprocessors, 2021, 0(1): 13-16 |
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| Authors: | LU Ting FENG |
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| Affiliation: | (The 47th Institute of China Electronics Technology Group Corporation,Shenyang 110000,China) |
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| Abstract: | A switched capacitor bandgap reference voltage source with high- order curvature compen-sation is introduced and designed, which adopts automatic zero adjustment technology to overcome the .offset defect of traditional linear reference, eliminate the influence of offset voltage and improve theoutput accuracy of operational amplifier. The design adopts virtual tube to reduce the parasitic effectwhen the switch tube is turned off. By introducing high -order compensation term, the output voltage -temperature curve is sinusoidal, which significantly reduces the temperature coefficient. The circuit isimplemented in 0.35 μm standard CMOS process, and the temperature coefficient, temperature drift andlinear adjustment rate in a certain temperature range are obtained by simulation. The designed electricalappliance can be used as a typical discrete-time band gap reference, and has certain application value incircuits characterized by high precision. |
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| Keywords: | Bandgap reference Auto-zero Switched capacitor Offset cancellation High order compensation |
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