| 基于电流控制模式的低压、高PSRR基准源 |
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| 引用本文： | 张慧敏,周云,王璐霞,袁凯. 基于电流控制模式的低压、高PSRR基准源[J]. 微处理机, 2011, 32(5): 22-25. DOI: 10.3969/j.issn.1002-2279.2011.05.007 |
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| 作者姓名： | 张慧敏 周云 王璐霞 袁凯 |
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| 作者单位： | 电子科技大学光电信息学院电子薄膜与集成器件国家重点实验室,成都,610054 |
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| 摘 要： | 基于可调电流控制模式设计出一种低压、高电源抑制比的带隙基准电压源电路。采用电流控制模式和多反馈环路,提高电路的整体电源抑制比;通过电阻分压的方式,使电路达到低压,同时提供偏压,简化偏置电路。采用0.5μmCMOS N阱工艺,电路可在电源电压为1.5V时正常工作。使用Cadence Spectre进行仿真结果表明,低频时电源抑制比(PSRR)高达107dB。-10℃～125℃温度范围内,平均温度系数约7.17ppm/℃,功耗仅为0.525mW。此电路能有效地抑制制程变异。
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| 关 键 词： | CMOS基准电压源 独立电流模式 低电压 高电源抑制比 |
A Low Voltage High PSRR Reference Source Based on Regulated Current Mode Structure |
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| ZHANG Hui-min,ZHOU Yun,WANG Lu-xia,YUAN Kai. A Low Voltage High PSRR Reference Source Based on Regulated Current Mode Structure[J]. Microprocessors, 2011, 32(5): 22-25. DOI: 10.3969/j.issn.1002-2279.2011.05.007 |
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| Authors: | ZHANG Hui-min ZHOU Yun WANG Lu-xia YUAN Kai |
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| Affiliation: | ZHANG Hui-min,ZHOU Yun,WANG Lu-xia,YUAN Kai(VLSI Design Center,University of Electronic Science and Technology of China,Chengdu 610054,China) |
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| Abstract: | A new bandgap voltage reference circuit with low voltage,high power supply rejection ratio(PSRR) based on a regulated current mode structure is presented.The proposed circuit utilizes a regulated current mode structure and some feedback loops to improve the overall PSRR.Using resistive subdivision reaches a low voltage and provides the bias voltage of transistors,simplified bias circuit.The circuit was designed with 0.5μm complementary metal oxide semiconductor transistor(CMOS) N-well technology,which worked at 1.5V power voltage.Cadence Spectre simulation results show PSRR is 107dB at low frequencies,the temperature coefficient from-10℃ to 125℃ temperature range is 7.17 ppm/℃ and the power consumption is only 0.525mW.This circuit shows robustness against process variation. |
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| Keywords: | CMOS voltage reference A regulated current mode structure Low voltage High PSRR |
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