一种高性能电流差分缓冲放大器

发布时间：2018-02-22 00:21

本文关键词： 模拟集成电路低功耗高频电流模式滤波器　出处：《微电子学》2017年01期 　论文类型：期刊论文

【摘要】：提出了一种新型低功耗、宽线性范围的电流差分缓冲放大器,电路中的电流镜全部采用NMOS电流镜结构,电路结构简单。对传统的电流源结构的电流输入端进行改进,降低了电路的工作电压和功耗;在电流输出端采用改进型威尔逊电流镜结构,提高了电路的线性度和带宽;在电压输出端采用电压缓冲放大器,降低了端口阻抗,提高了电压带宽。基于0.18μm CMOS工艺,采用Pspice软件对电路进行仿真:在±0.8V的供电电压下,电路的电流电压传输率α_p,α_n和β_v分别为1.020,1.020,0.998;I_z/I_p,I_z/I_n和V_w/V_z的3阶互调截点频率分别为376,376和726MHz;整个电路功耗仅为0.48mW。最后,将提出的低电压低功耗高频电流差分缓冲放大器成功应用于双2阶电流模式滤波器中。
[Abstract]:A new type of low power and wide linear differential current buffer amplifier is proposed. The current mirror in the circuit is all NMOS current mirror structure, and the circuit structure is simple. The current input terminal of the traditional current source structure is improved. The operating voltage and power consumption of the circuit are reduced, the improved Wilson current mirror structure is adopted at the current output, the linearity and bandwidth of the circuit are improved, the voltage buffer amplifier is adopted at the voltage output, and the port impedance is reduced. Based on 0.18 渭 m CMOS process, the circuit is simulated by Pspice software: under 卤0.8 V supply voltage, The current and voltage transmission rates of the circuit are 伪 _ p, 伪 _ S _ n and 尾 _ S _ v are 1.020 / 1.020 / 0.998 / 0.998s / s respectively, respectively. The third-order intermodulation cut-off frequencies of the two circuits are 376,376 and 726 MHz, respectively, and the power consumption of the whole circuit is only 0.48 MW. Finally, The proposed low-voltage low-power high-frequency current differential buffer amplifier is successfully applied to the two-order current-mode filter.
【作者单位】：湖南工业职业技术学院电气工程系;邵阳学院信息工程系;
【基金】：湖南省自然科学基金资助项目(13JJ6078) 湖南省教育科学“十二五”规划课题资助项目(XJK014BGD073) 湖南省教育厅资助项目(14C1013)
【分类号】：TN722.76

【相似文献】