CAJ | 학술논문

在用示波器进行RC一阶电路时间常数τ的测量时，通常采用时标法测量输入信号脉冲宽度大于5τ情况下的时间常数，而当脉冲宽度小于5τ时，采用时标法比较困难。通过分析RC一阶电路充放电过程，得到τ＝（T/2）/ln（U01/U01），再利用Multisim8读出U02，U01，进而准确算出电路时间常数τ，从而克服了在脉冲宽度小于5τ的情况下应用时标测量法存在的困难。
재용시파기진행RC일계전로시간상수τ적측량시，통상채용시표법측량수입신호맥충관도대우5τ정황하적시간상수，이당맥충관도소우5τ시，채용시표법비교곤난。통과분석RC일계전로충방전과정，득도τ＝（T/2）/ln（U01/U01），재이용Multisim8독출U02，U01，진이준학산출전로시간상수τ，종이극복료재맥충관도소우5τ적정황하응용시표측량법존재적곤난。
For measuring the RC circuit's time constant with an oscilloscope , the time constant τ, which input signal pulse width is greater than 5τ, is usually measured using the method of time scale However , when the pulse width is less than 5τ, there is some difficulty if applying time scale method .In the present article , by analyzing the charge and discharge process of the first-order RC circuits, the authors obtain the formula τ=(T/2)/ln(Uo2/Uo1).Then, find the value Uo2,Uo1 by use of Multisim8, and accurately calculate the time constant of the circuit , and so, overcome difficulty in applying the method of time scale measurement when the pulse width is less than 5τ.