基于电流补偿电流镜的改进型电流控制电流传输器  

An improved CCCII based on current compensated current mirror

作　　者：胡许光 王卫东[1] 陈培腾 刘晨光[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：《微型机与应用》2015年第3期41-43,46,共4页Microcomputer & Its Applications

摘　　要：提出了一种基于新型电流补偿电流镜的改进型CMOS电流控制电流传输器,电路由电流补偿电流镜和跨导线性环构成。相对于以往提出的电流控制电流传输器,该电路具有更高的电流跟随精度以及Z端输出阻抗。采用SMIC 0.18μm CMOS工艺参数,在±1.2 V的供电电源条件下,用Spectre对电路进行仿真。结果表明:在50μA的偏置电流下,电流的跟随精度为1.004,-3 d B带宽为200 MHz,Z端阻抗为2 MΩ。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。This paper proposes an improved CMOS CCCII based on current compensated current mirror, the circuit consists of current compensation current mirror and a translinear loop. Compared to the previous proposed CCCII, the circuit has higher current tracking accuracy and the Z output impedance.Using SMIC 0.18 μm CMOS technology, when the power supply voltage is ±1.2 V and bias current is 50 μA, the Spectre simulation results showed that current tracking accuracy is 1.004, the-3 d B bandwidth is 200 MHz, Z terminal impedance for 2 MΩ. The circuit can be used in the design of tunable continuous time current mode filter.

关 键 词：电流补偿电流镜 跨导线性环 电流控制电流传输器 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]