《测试与检测技术基础》课程电子教案（PPT教学课件）Fundamentals of Measurement Technology（28/28）

5.4.3 Types offilters R R R RI (b) Fig. 5.43 First-order active low-pass filter

5.4.3 Types of filters Fig. 5.43 First-order active low-pass filter

5.4.3 Types offilters 二 Plus H 25R, v Fig 5.44 Active second-order low-pas filter and voltage-controlled state-variable filter

5.4.3 Types of filters Fig. 5.44 Active second-order low-pas filter and voltage-controlled state-variable filter

5.4.3 Types offilters 2. High-pass filters H(s)= (572) +1 Hla JOt (5.73) 1+JOt OT (5.74) 1+(or 0(o) arct g (5.74) The cut-off frequency: cs-I 2TRO

5.4.3 Types of filters 2. High-pass filters ( ) +1 = s s H s   ( )    j j H j + = 1 ( ) ( ) 2 1    + H j = ( )    1 = arctg (5.72) (5.73) (5.74) (5.74) The cut-off frequency: RC f c 2 1 1 =