今第几章波形发生电路岭 RC串并联选频网络 R 1+jOR,C2 R R1+ 十 jaC 1+jaR,C2 G R C2R2 Ur (1+K+C2)+jar, Ci aR20 R C 图8.1.4 取R1=R2=R,C 2 C,令 则 RC 3+j 0图 8.1.4 一、RC 串并联选频网络 Z1 Z2 ) 1 (1 ) 1 1 1 1 2 1 1 2 1 2 2 1 1 2 2 1 2 2 2 1 2 2 R C R C C C R R C R C R R C R U U F         + + + − = + + + + = + = = j( j 1 j j f    取 R1 = R2 = R ， C1 = C2 = C ，令 RC 1  0 = 则： 3 j( ) 1 0 0     + − F = 