CAJ | 학술논문

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。
수입전조시방대전로적일개중요적성능지표，일반유전로결구본신결정。단대우쌍단수입적차분방대전로이언，수입전조적계산각시여수입형식밀절상관적。본문논술료운산방대기차분전로수입전조적합리계산문제，지출료차분전로접지수입화현부수입적본질차별，급출료량충방식하수입전조적준학구해방법。
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.