采用最大电流选择的恒定跨导Rail-to-RailCMOS运放输入级  

Constant-g_m Rail-to-Rail CMOS op-amp input-stage by maximum current selection

作　　者：陈斯[1] 恽廷华[1] 

机构地区：[1]徐州师范大学物理系电子科学教研室,江苏徐州221116

出　　处：《电路与系统学报》2006年第6期120-123,共4页Journal of Circuits and Systems

摘　　要：基于TSMC0.18-μmCMOS工艺设计了一种具有恒定跨导的1.8Vrail-to-railCMOS运算放大器的输入级。采用两路结构相同的最大电流选择电路实现输入级总跨导的恒定。电路采用Hspice仿真,工作电压1.8V。输入级在强反型层工作时,电路的总跨导偏差在5%之内;弱反型层工作时,总跨导偏差在8%之内。Based on the TSMC 0.18-μm CMOS process, a 1.8V constant gm rail-to-rail CMOS operational amplifier input stage is designed. The constant gm, of input stage is achieved by two identical maximum current selection circuits. The circuit is simulated by Hspice, and the power supply is 1.8V. The total gm variation of input stage is within 5% while the input stage works in strong inversion and less than 8% while in weak inversion.

关 键 词：RAIL-TO-RAIL 恒定跨导 最大电流选择 

分 类 号：TN402[电子电信—微电子学与固体电子学]