| HBT自热效应对功率放大器偏置电路的影响及补偿 |
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| 引用本文： | 陈延湖,申华军,王显泰,葛霁,刘新宇,吴德馨.HBT自热效应对功率放大器偏置电路的影响及补偿[J].电子器件,2007,30(3):829-832. |
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| 作者姓名： | 陈延湖 申华军 王显泰 葛霁 刘新宇 吴德馨 |
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| 作者单位： | 中国科学院微电子研究所,北京,100029 |
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| 摘 要： | 研究了GaAs HBT的自热效应对功率放大器镜像电流源偏置电路性能的影响.HBT自热效应使得这种偏置电路的镜像精度和温度特性变差.利用HBT器件特有的集电极电流热电负反馈理论,通过优化基极偏置电阻的方法,对自热效应进行了有效补偿,偏置电路的电流镜像精度得到有效提高,偏置电流温度漂移由9.5%减小到0.5%.
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| 关 键 词： | 自热效应 HBT 镜像电流源偏置电路 功率放大器 |
| 文章编号： | 1005-9490（2007）03-0829-04 |
| 修稿时间： | 2006-05-29 |
Effect of HBT Self-Heating Effect on Bias Circuit for Power Amplifier and Its Compensation |
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| CHEN Yan-hu,SHEN Ha-jun,WANG Xian-tai,GE Ji,LIU Xin-yu,WU De-xin.Effect of HBT Self-Heating Effect on Bias Circuit for Power Amplifier and Its Compensation[J].Journal of Electron Devices,2007,30(3):829-832. |
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| Authors: | CHEN Yan-hu SHEN Ha-jun WANG Xian-tai GE Ji LIU Xin-yu WU De-xin |
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| Affiliation: | Institute of Microelectronics, The Chinese Academy of Sciences, Beijing 100029, China |
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| Abstract: | The effect of GaAs hbt Self-Heating effect on current mirror bias circuit for power amplifier was studied. The effect of self-heating degraded the mirror accuracy and the temperature characteristic of the bias circuit. According to the novel electrical-thermal negative feedback of hbt, a simple method of optimizing a base bias resistor was used to compensate the self-heating in this bias circuit. The results showed that the mirror accuracy was improved and the variation of the bias current as temperature was reduced from 9.5 % to 0. 5 %. |
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| Keywords: | self-heating effect heterojunction bipolar transistor(HBT) current mirror bias circuit power amplifier |
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