The 2nd chapter compared CFA and VFA (Voltage Feedback Amplifier) from circuit topology structure to ideal circuit model to point out the difference of those 2 types amplifiers.

• 第二章，从电路拓扑结构、理想模型等对电压反馈型运算放大器和电流型运算放大器进行了详细的对比，并给出了各自的特点。