| 一种采用改进自调零技术的误差放大器设计 |
| |
| 引用本文： | 王松林,张树春,叶强,王晓光,罗鹏,丁睿.一种采用改进自调零技术的误差放大器设计[J].复旦学报(自然科学版),2010(6). |
| |
| 作者姓名： | 王松林 张树春 叶强 王晓光 罗鹏 丁睿 |
| |
| 作者单位： | 西安电子科技大学机电工程学院;西安电子科技大学电路CAD研究所; |
| |
| 基金项目： | 国家自然科学基金(60876023)资助项目 |
| |
| 摘 要： | 设计了一种乒乓结构的误差放大器,采用改进的自动调零技术,实现连续时间内的信号放大和失调消除.利用可变增益电流镜构造了带辅助输入端的运放,克服了传统的失调存储技术对环路稳定性的影响.由于失调周期性的校准,很大程度上减小了开关频率范围内的1/f噪声,还可以消除由温度变化引起的运放失调漂移.采用0.6μm CMOS工艺进行了仿真验证,结果表明,误差放大器低频增益可达91.96 dB,-3 dB带宽为11.58 kHz,静态耗电流仅为14μA,失调消除电路可将1~20 mV的输入失调电压消除至20μV以内.
|
| 关 键 词： | 误差放大器 乒乓结构 失调消除 自动调零 |
An Error Amplifier with Improved Auto-Zeroing Technique |
| |
| WANG Song-lin,ZHANG Shu-chun,YE Qiang,WANG Xiao-guang,LUO Peng,DING Rui.An Error Amplifier with Improved Auto-Zeroing Technique[J].Journal of Fudan University(Natural Science),2010(6). |
| |
| Authors: | WANG Song-lin ZHANG Shu-chun YE Qiang WANG Xiao-guang LUO Peng DING Rui |
| |
| Institution: | WANG Song-lin1,ZHANG Shu-chun1,YE Qiang2,WANG Xiao-guang2,LUO Peng1,DING Rui2(1.School of Mechano-electronic Engineering,Xidian University,Xi'an 710071,China,2.Institute of Electronic CAD,China) |
| |
| Abstract: | An error amplifier with Ping-Pong structure is presented.An improved auto-zeroing technique is used to amplify signals continuously and cancel offset.The amplifier with an auxiliary input is constructed through a programmable current mirror,which avoids the influence of the traditional offset storing technique on the loop stability.Because of the periodical adjusting of the offset,the 1/f noise in the range of switching frequency is obviously reduced,and the offset drift caused by temperature change is also... |
| |
| Keywords: | error amplifier Ping-Pong structure offset cancellation auto-zeroing |
| 本文献已被 CNKI 等数据库收录！ |
|
