差模电压放大倍数的四种分析方法  

Four Analysis Methods for Differential Mode Voltage Gain

作　　者：何红宇[1] 吴艳杰[1] 唐惠玲[1] 周展怀[1] 

机构地区：[1]广东工业大学物理与光电工程学院,广东广州510006

出　　处：《电气电子教学学报》2008年第3期18-19,22,共3页Journal of Electrical and Electronic Education

摘　　要：差分放大电路的主要作用是抑制共模电平和放大差模信号,因而具有良好的温度和噪声特性,是集成运放的重要基础。为了更好地对差模放大倍数进行分析,文章总结出三种新的解法,即直接求解法、GmRout方法和戴维宁求解,可合计得到四种分析方法。便于学生有机地把电路理论的知识运用到模拟电路分析中,加深对差分放大电路的理解。Differential amplifier circuit has lower common gain and higher differential gain, so its temperature and noise characteristic is good and it is the fundamental part of operatim amplifier. Three new analysis methods are proposed to differential gain, such as global analysis, GmRout and Thevenin＇s equivalent, so total four methods can be obtianed. It can help students to apply circuit theory in analog electronics analysis and emphasize understand to differential amplifier circuit.

关 键 词：模拟电路 差分放大 戴维宁定理 

分 类 号：TN72[电子电信—电路与系统]