| 一种新型无运放CMOS带隙基准电路 |
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| 引用本文： | 冯树,王永禄,张跃龙.一种新型无运放CMOS带隙基准电路[J].微电子学,2012,42(3):336-339. |
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| 作者姓名： | 冯树 王永禄 张跃龙 |
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| 作者单位： | 1. 重庆邮电大学,重庆400065;模拟集成电路重点实验室,重庆400060
2. 模拟集成电路重点实验室,重庆,400060 |
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| 摘 要： | 介绍了带隙基准原理和常规的带隙基准电路,设计了一种新型无运放带隙基准电路。该电路利用MOS电流镜和负反馈箝位技术,避免了运放的使用,从而消除了运放带隙基准电路中运放的失调电压和电源抑制比等对基准源精度的影响。该新型电路比传统无运放带隙基准电路具有更高的精度和电源抑制比。基于0.18μm标准CMOS工艺,在Cadence Spectre环境下仿真。采用2.5V电源电压,在-40℃～125℃温度范围的温度系数为6.73×10-6/℃,电源抑制比为54.8dB,功耗仅有0.25mW。
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| 关 键 词： | 带隙基准电压源 无运放基准源 启动电路 |
A New Opamp-less CMOS Bandgap Voltage Reference Circuit |
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| FENG Shu
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WAN Yonglu
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ZHANG Yuelong.A New Opamp-less CMOS Bandgap Voltage Reference Circuit[J].Microelectronics,2012,42(3):336-339. |
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| Authors: | FENG Shu WAN Yonglu ZHANG Yuelong |
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| Affiliation: | 1,2(1.Chongqing University of Posts and Telecommunications,Chongqing 400065,P.R.China; 2.Science and Technology on Analog Integrated Circuit Laboratory,Chongqing 400060,P.R.China) |
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| Abstract: | Theory of bandgap reference voltage and conventional bandgap reference circuits were presented,and a novel bandgap reference circuit without op-amp was designed.In the circuit,MOS current mirrors and negative feedback clamping technique were used to avoid the use of operational amplifier,thus eliminating effects of offset and power supply rejection ratio(PSRR) of the operational amplifier on accuracy of bandgap voltage reference.Based on 0.18 μm standard CMOS process,the circuit was simulated using Spectre of Cadence.Simulation results showed that the bandgap voltage reference circuit had a temperature coefficient of 6.73×10-6/℃ in the temperature range from-40 ℃ to 125 ℃,and a PSRR of 54.8 dB,and it consumed 0.25 mW of power from 2.5 V supply. |
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| Keywords: | Bandgap voltage reference Op amp-less reference source Startup circuit |
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