新型宽可调范围CMOS电调谐第二代电流传输器(ECCII)  

A New CMOS Electronically Tunable Current Conveyor with Wide Tuning Range

作　　者：胡许光 王卫东[1] 

机构地区：[1]桂林电子科技大学信息与通信学院,广西桂林541004

出　　处：《电子器件》2015年第3期521-525,共5页Chinese Journal of Electron Devices

摘　　要：提出了一种具有宽电流可调谐范围的新型CMOS电调谐第二代电流传输器(ECCII),通过引入基于差分差动电流传输器(DDCC)的对数反对数电流放大器,使电流增益通过偏置电流连续可调,在一定偏置电流下,调节系数0<k≤10。输入端采用的轨对轨结构通过在其第二级加入共源共栅电流镜,提高了电压跟随精度。采用SMIC 0.18μm CMOS工艺参数,在±1V的供电电源条件下,用Spectre对电路进行仿真。结果表明:vx/vy和iz/ix的-3 d B带宽分别为300 MHz和155 MHz,电压跟随精度为0.997,功耗为1.642 4 m W。经验证,该电路可用于设计可调谐连续时间电流模式滤波器,具有广泛的应用前景。A new CMOS electronically tunable second-generation current conveyor（ ECCII） with wide tuning range was presented. By introducing the log-antilog current amplifier based on DDCC,the current gain was controlled electronically by adjusting the ratio of DC bias currents of the ECCII,In a certain range of the bias current,0 k≤10. The input stage adopts rail to rail structure by adding a cascode current mirror in the second level,increase the voltage tracking accuracy. Using SMIC 0. 18 μm CMOS technology,the Spectre simulation results showed that vx/ vy and iz/ ixhad- 3 d B bandwidth of 300 MHz and 155 MHz,Voltage tracking accuracy is 0. 997,DC power consumption was 1. 642 4 m W. The ECCII has comprehensive applications in the tunable current mode continuous time filters.

关 键 词：电调谐第二代电流传输器 宽可调范围 对数反对数电流放大器 差分差动电流传输器 电流模式滤波器 

分 类 号：TN432[电子电信—微电子学与固体电子学]