| 电流模逻辑电路中高线性度电流参考源的分析与设计(英文) |
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| 引用本文： | 周明珠,朱恩,王守军,王志功,韩鹏,李伟.电流模逻辑电路中高线性度电流参考源的分析与设计(英文)[J].东南大学学报,2009,25(1). |
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| 作者姓名： | 周明珠 朱恩 王守军 王志功 韩鹏 李伟 |
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| 作者单位： | 周明珠,朱恩,王志功,韩鹏,李伟,Zhou Mingzhu,Zhu En,Wang Zhigong,Han Peng,Li Wei(东南大学射频与光电集成电路研究所,南京,210096);王守军,Wang Shoujun(IDT-Shanghai,上海,200233)
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| 摘 要： | 描述了应用于电流模逻辑电路中的高线性度电压-电流转换电路的设计与实现.该电路采用高增益两级运算放大器构成负反馈,偏置电路利用工作在弱反型区的MOS管电压电流呈指数律关系构成PTAT(proportional to absolute temperature)基准电流源.详细分析了电阻的类型以及运算放大器的参数对线性度的影响.通过优化运算放大器的参数并采用电压系数较小的多晶硅电阻作为线性器件获得了较高的线性度.本电路已采用CSMC0.6μm CMOS工艺实现,测试结果表明:输出的总谐波失真为0.000 2%.输入动态范围为0～2.6V,输出电流为50～426 μA.PTAT基准电流源对电源变化的灵敏度为0.021 7.芯片采用5 V供电,功耗约为1.3 mW,芯片面积为0.112 mm2.
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| 关 键 词： | 线性电压电流转换电路 谐波失真 运算放大器 PTAT基准电流源 |
Analysis and design of high linearity current reference for current mode circuits |
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| Zhou Mingzhu Zhu En Wang Shoujun Wang Zhigong Han Peng Li Wei.Analysis and design of high linearity current reference for current mode circuits[J].Journal of Southeast University(English Edition),2009,25(1). |
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| Authors: | Zhou Mingzhu Zhu En Wang Shoujun Wang Zhigong Han Peng Li Wei |
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| Institution: | 1Institute of RF-& OE-ICs;Southeast University;Nanjing 210096;China;2 IDT-Shanghai;Shanghai 200233;China |
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| Abstract: | A complementary metal-oxide-semiconductor transistor(CMOS) voltage-to-current(VTC)converter with high linearity for current-mode analog and digital integrated circuits is described.A high gain operational amplifier(OPA)is utilized to form negative feedback.A proportional to absolute temperature(PTAT)current reference with transistors operated in a weak inversion is used as the bias circuit.The resistor and the OPA nonlinearity behavior are analyzed in detail.By optimizing parameters in OPA and adopting a sm... |
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| Keywords: | linear voltage-to-current converter harmomc distortion operational amplifier PTAT current reference |
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