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一种高线性度电压电流转换电路的设计与实现 被引量:2
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作者 周明珠 朱恩 +3 位作者 王守军 王志功 韩鹏 李伟 《固体电子学研究与进展》 CAS CSCD 北大核心 2009年第2期281-286,共6页
介绍了利用CSMC 0.6μm CMOS工艺实现的、应用于电流模逻辑电路中的高线性度电压电流转换(VTC)电路。该电路采用了高增益两级运算放大器,以及工作在弱反型区的MOS管电压电流呈指数律关系实现的PTAT基准电流源。详细分析了电阻与运算放... 介绍了利用CSMC 0.6μm CMOS工艺实现的、应用于电流模逻辑电路中的高线性度电压电流转换(VTC)电路。该电路采用了高增益两级运算放大器,以及工作在弱反型区的MOS管电压电流呈指数律关系实现的PTAT基准电流源。详细分析了电阻与运算放大器的非线性影响因素。测试结果表明,输出的总谐波失真为0.0002%,输入动态范围为0~2.6V,输出电流为50~426μA,PTAT基准电流源对电源变化的灵敏度为0.0217。芯片采用5V供电,功耗约为1.3mW,芯片面积为0.112mm2。 展开更多
关键词 线性电压电流转换电路 谐波失真 PTAT基准电流源 运算放大器
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Analysis and design of high linearity current reference for current mode circuits
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作者 周明珠 朱恩 +3 位作者 王守军 王志功 韩鹏 李伟 《Journal of Southeast University(English Edition)》 EI CAS 2009年第1期18-22,共5页
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 amplif... 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 small voltage coefficient polysilicon resistor as a linear device, a high linearity is achieved. The circuit is implemented in a standard 0. 6 μm CMOS technology. The low frequency gain of the OPA exceeds 90 dB. The test results indicate that the total harmonic distortion (THD)is 0. 000 2%. The common-mode input linearity range is 0 to 2. 6 V. Correspondingly, the output current range is 50 to 426μA. The sensitivity of the PTAT current reference to Vdd is approximately 0. 021 7. The chip consumes a power of less than 1.3 mW for a 5 V supply, and occupies an area of 0. 112 mm^2. 展开更多
关键词 linear voltage-to-current converter harmonic distortion operational amplifier PTAT current reference
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