7-2RC电路的频率特性 7-2-1Rc低通网络 R Rc串联电路,电容电压对输 入电压的转移电压比为 ( HGo=kgo jc +11+ JORC Joc 令 RC7则:H(10)=~1 =H(j0)∠() 1+7-2 RC电路的频率特性 RC串联电路,电容电压对输 入电压的转移电压比为 RC C R C U U H KU 1 j 1 j 1 j 1 (j ) (j ) 1 2 + = + = = = 令 RC τ ω 1 1 C = = 则: | (j )| ( ) 1 j 1 (j ) C = + H = H 7-2-1 RC低通网络 R jC 1 − + U1 − + U2