/w(t)+w,(t)/ LⅣ2/R2 ∴Q=2丌 2丌 (2/R)(2n/) Z R ROC RVC R B VRERlER-=v R VL=jO LI=jo l=jov R C jov Oc r o>>I series resonance--voltage resonanceR （ r ） c L V / R )( / LV / R P T [w (t ) w (t )] Q     2 2 2 2 2 2 = +  = L R Q B r = − = =  2 1 • • • • = = =V R V V R R I R • • • • = = = jQV R V V L jr L I jr L • • • • = − = − = − jQV R V C I j C V j r r C   1 1 • I • V • C V • L V C L R R C R L r r 1 1 = = =   Q>>1 series resonance--voltage resonance