摘要
输入电阻是放大电路的一个重要的性能指标,一般由电路结构本身决定。但对于双端输入的差分放大电路而言,输入电阻的计算却是与输入形式密切相关的。本文论述了运算放大器差分电路输入电阻的合理计算问题,指出了差分电路接地输入和悬浮输入的本质差别,给出了两种方式下输入电阻的准确求解方法。
The input resistance, usually determined only by the circuit structure, is a most significant performance evaluation of an amplifier. But for the differential amplifier, two independent input signals are allowed, so the input resistance is closely relevant to input connection. This paper gives a clear discussion on the calculation of the input resistance in the differential amplifiers, and highlights the essential differences between the grounded input and the suspended input, while providing the precise calculation methods respectively.
出处
《电气电子教学学报》
2011年第3期45-47,共3页
Journal of Electrical and Electronic Education
关键词
输入电阻
接地输入
悬浮输入
input resistance
grounded input
suspended input
