2章连续糸统的肘域分析 根据KCL,有ic(t)=is(t)-i(t),因而 u(t=Ric(t=R(is(t)-i(t) dis(t)di, (t) di,(t)n di, (t) ()-(1)+R(drat R2 整理上式后,可得 "m+C4()=m)+1 di, (t),R+r2 di, (t) 1 l dt c (2-2) i, (t)r+r di, (t) 1 +产i1()=R dis(t)rr di(t) L dt LC dt L dt (2-3) 《信号与线性系统》《 信号与线性系统》 第2章 连续系统的时域分析 根据KCL,有iC(t)=iS (t)-iL (t),因而 u1 (t)=R1 iC(t)=R1 (iS (t)-iL (t)) 2 1 2 2 2 1 2 1 2 1 ( ) ( ) ( ) ( ) ( ( ) ( )) ( ) ( ) ( ) 1 ( ) 1 ( ) ( ) S L L L S L L L S L S di t di t d i t di t i t i t R L R C dt dt dt dt d i t R R di t R di t i t i t dt L dt LC L dt LC − + − = + + + + = + (2―2) 整理上式后,可得 2 2 1 1 2 1 1 2 2 2 1 1 ( ) ( ) 1 ( ) ( ) ( ) S S d i t R R di t d i t R R di t i t R dt L dt LC dt L dt + + + = + (2―3)