VL+VC+VR=0{\displaystyle V_{L}+V_{C}+V_{R}=0}d2idt2+RLdidt+1Ti=0{\displaystyle {\frac {d^{2}i}{dt^{2}}}+{\frac {R}{L}}{\frac {di}{dt}}+{\frac {1}{T}}i=0} d2dt2i=−2αdidt−βi{\displaystyle {\frac {d^{2}}{dt^{2}}}i=-2\alpha {\frac {di}{dt}}-\beta i} i=A(α)Sinωt{\displaystyle i=A(\alpha )Sin\omega t} A(α)=Ae−αt{\displaystyle A(\alpha )=Ae^{-\alpha t}} ω=β−α{\displaystyle \omega ={\sqrt {\beta -\alpha }}} β=1T=1LC{\displaystyle \beta ={\frac {1}{T}}={\frac {1}{LC}}} γ=βγ=R2L{\displaystyle \gamma =\beta \gamma ={\frac {R}{2L}}} T=LC{\displaystyle T=LC} γ=RC{\displaystyle \gamma =RC}