中文摘要：

讨论了集成运放的分析方法以及在不同工作状态时的应用电路。当集成运放通过外电路引入负反馈时,集成运放形成闭环并工作在线性区,可构成模拟信号运算放大电路,正弦波振荡电路和有源滤波电路;若集成运放开环或引入正反馈时,工作在非线性区,集成运放则可构成各种电压比较器和非正弦波发生器等。

英文摘要：

The analysis method of integrated operational amplifier（op-amp） was discussed as well as the application in different working condition. The op-amp will work in the linear state when a negative feedback is introduced, i.e. operational amplifier circuit, sinusoidal oscillation circuit and the active filtering circuit. If the op-amp has a positive feedback or no feedback, it will work in nonlinear area, such as, the voltage comparator and non-sinusoidal wave generator, etc.