1.令s=jo,电路的增益函数 AG0)= 1+joRC 1+jo/@p A()-+(oo,) 或A,(oB=-20gV1+(o/o,) p(@)=-arctan(o/op)1.令s = j,电路的增益函数 +  = + =     j RC j A j v 1 1 1 1 ( ) ( ) arctan( ) ( ) 20lg 1 ( ) 1 ( ) 1 ( ) 2 d B 2    = − = − + + =           A v v A A 或