| 一种低功耗的自适应偏置电路的设计 |
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| 引用本文： | 邓小川,刘桥.一种低功耗的自适应偏置电路的设计[J].贵州大学学报(自然科学版),2003,20(4):380-382. |
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| 作者姓名： | 邓小川 刘桥 |
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| 作者单位： | 贵州大学,电子科学系,贵州,贵阳,550025 |
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| 摘 要： | 主要研究一种低电压、低功耗的自适应偏置电路结构。它没有采用目前常用的通过减少电路静态电流来降低运算放大器功耗的方法，而是通过改变电路结构，用非常小的偏置电流来补偿晶体管阈值电压的方法，从而避免了对电路暂态性能的影响。文中介绍了电路的原理，并进行了大信号分析。通过对电路的PSPICE仿真，理论值与仿真结果相差不到2％。
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| 关 键 词： | 低功耗 自适应偏置 PSPICE仿真 |
| 文章编号： | 1000-5269(2003)04-0380-03 |
| 修稿时间： | 2003年7月23日 |
Design of A Low- power Adaptive Biasing Circuit |
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| DENG Xiao-chuan,ZHAO Jun-xia,LIU Qiao.Design of A Low- power Adaptive Biasing Circuit[J].Journal of Guizhou University(Natural Science),2003,20(4):380-382. |
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| Authors: | DENG Xiao-chuan ZHAO Jun-xia LIU Qiao |
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| Abstract: | A Low - Power adaptive biasing circuit is introduced to reduce the stand - by power dissipation without affection the transient performance by providing a very small biasing current, whose task is the compensation of the threshold voltages of the transistors. And astudy of the large signal circuit behavior is given. The agreement between theoretical calculations and Spice simulations makes these results very useful for the circuit design. The circuit can be utilized in low - voltage low - power operational amplifier in particular for the biasing of the input stage. |
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| Keywords: | low-power adaptive bias pspice simulation |
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