| 一种启动电流为0的CMOS低功耗低成本电流源 |
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| 引用本文： | 陈斯,恽廷华. 一种启动电流为0的CMOS低功耗低成本电流源[J]. 电子工程师, 2009, 35(3): 10-12 |
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| 作者姓名： | 陈斯 恽廷华 |
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| 作者单位： | 1. 徐州师范大学物理与电子工程学院,江苏省徐州市,221116
2. 智迈微电子科技(上海)有限公司,上海市,200433 |
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| 基金项目： | 江苏省高校自然科学研究计划，徐州师范大学校科研基金 |
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| 摘 要： | 根据传统电流源结构，设计了一种启动电流为0的CMOS低功耗电流源。电流源的启动电路仅采用一个耗尽型MOS管，电路正常工作后启动电路会自动关断。仿真结果显示电路正常工作后启动部分消耗的电流基本降为0，整个电路功耗24．9μW。这种结构降低了整个电路的功耗，大大节省了芯片面积。电路基于TSMC0．18μm CMOS工艺，电源电压1．8V，仿真软件为Hspice。
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| 关 键 词： | CMOS电流源 启动电路 耗尽型MOSFET 低功耗 |
A Low Power Consumption Low Cost CMOS Current Source with Zero Startup Current |
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| CHEN Si,YUN Tinghua. A Low Power Consumption Low Cost CMOS Current Source with Zero Startup Current[J]. Electronic Engineer, 2009, 35(3): 10-12 |
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| Authors: | CHEN Si YUN Tinghua |
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| Affiliation: | 1.Xuzhou Normal University;Xuzhou 221116;China;2.Wiscomm Microsystems Inc;Shanghai 200433;China |
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| Abstract: | A low power consumption low cost CMOS current source with Zero Startup Current is designed from the traditional current source structure. The startup circuit uses only a depletion-mode MOSFET and it will be cutoff automatically when the current source works. Simulation results show that the startup current decreases to zero while the circuit works in normal mode, and the power consumption of the whole circuit is 24.9 μW. The designed current circuit can not only reduce the whole circuit power consumption but also greatly reduces the size of the chip. The manufactured circuit is based on TSMC 0.18 μm CMOS process. The power supply voltage is 1.8 V, simulation tool is Hspice. |
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| Keywords: | CMOS current source startup circuit depletion-mode MOSFET low power consumption |
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