一个0.9V低电压双端输出第二代电流传输器的设计

摘要

介绍一个0.9V低电压双端输出第二代电流传输器(DOCCⅡ)的设计.输入级采用衬底驱动MOSFET有效地避免了阈值电压的限制;同时采用了局部正反馈技术提高了带宽增益,因此DOCCII获得了更好的电压跟随特性.该设计电路在标准0.18 μm CMOS工艺下,采用Cadence Spectre和BSIM3v3模型对其进行了调试和仿真.仿真结果显示；该DOCCⅡ具有4.8MHz的带宽,同时具有比较高的线性度和很好的输入输出电阻.%A 0.9 V low voltage dual output CCII ( DOCCII) is presented. Bulk driven MOSFET at input avoids thernlimitation of threshold voltage efficiently, and a partial positive feedback is used to increase gain-bandwidth, so thernVoltage follower gets high performance. Designed circuit is simulated in a standard 0. 18 Jim CMOS process, usingrnCadence Spectre and BSIM3v3 models. The result of simulation indicates this DOCCII has bandwidth of 4. 8 MHzrnand high linearity and good input and output resistance.