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A stable CMOS current reference based on the ZTC operating point

机译：基于ZTC工作点的稳定CMOS电流基准

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This paper presents the design of a temperature stable, supply independent current reference in a 0.25 μm CMOS technology. A current with small temperature coefficient is derived by exploiting the zero temperature coefficient (ZTC) operating point of a MOS transistor. The transistor is used in a feedback loop to cancel the temperature dependence of a polysilicon resistor. It is shown that simple equations together with fast simulations of the ZTC point and a special temperature coefficient can quickly yield an accurate design. Measurements from 10 samples show an average current of 6 μA with a standard deviation of 2.3 %, a voltage dependence of 0.3 %/V whereas the temperature coefficient is approximately 130 ppm/°C measured over a temperature range from -40 °C to 125 °C. The circuit compares favorably with other published untrimmed current references.
机译：本文介绍了采用0.25μmCMOS技术的温度稳定，独立于电源的电流基准的设计。通过利用MOS晶体管的零温度系数（ZTC）工作点来导出具有小温度系数的电流。该晶体管用于反馈环路，以消除多晶硅电阻的温度依赖性。结果表明，简单的方程式以及对ZTC点的快速仿真和特殊的温度系数可以快速得出准确的设计。对10个样品的测量结果表明，平均电流为6μA，标准偏差为2.3 \％，电压依赖性为0.3 \％/ V，而在-40°C的温度范围内测得的温度系数约为130 ppm /°C到125°C。该电路与其他已发布的未修整电流基准相比具有优势。

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