第一阶段(t=0~20ms)电压过渡过程方程: f(O)=/(x)+[/(0)-f(x)]eh T=RC=2(ms C 0 0-)=0V) R E1=2(V) R+ r l()=2-2e 8/628 t f t f f f e − + ( ) = () + (0 ) − () (0 ) = (0 ) = 0(V) + − uC uC ( ) 2(V) 1 1 2 2 = + = E R R R uC = R C = 2(ms) d ( ) 2 2 2 V t c u t e − = − 第一阶段(t = 0 ~ 20 ms)电压过渡过程方程: /62