特例R=0→o=0 oUe sin(at+B P12=±joo sino dt 0=0=- C'B公 L 2 dt w0 Ue -ar sin(ot-阝) T c=Uo sin(oot+=uL 2 U I=-sin@ t OL 等幅振荡 无阻尼 L特例 R = 0 C uL u U t =  =  + ) 2 sin( 0 0 1,2  0 p =  j 2 1 0   =  = ， = LC   = 0 t L U i 0 0 0 sin  = e t L U t u i C C t   = − = − sin d d 0 sin( ) d d 0 0  −   = = − − U e t t i u L t L sin( ) 0 0      = + − u U e t t C 等幅振荡 无阻尼  0  C L + - t