ZXF36L01 查看數據表（PDF） - Zetex => Diodes
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ZXF36L01 Datasheet PDF : 12 Pages
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FILTER CONFIGURATIONS AND RESPONSES (continued)
Notch Filter (with attenuating skirts)
R=10kΩ
C=100nF
Rf=19.5kΩ
Ri=10kΩ
100nF
1
Input Signal
C
R
R
C
Ri
Rf
VSS
FI1
C1
RC1
R2
BI
MXO
RC2
GP1
GP2
GP3
VSS
5V
VDD
FI2
FO
MXI
LO
BI
BG
N/C
N/C
N/C
PD
VDD
24
Output Signal
100nF
5V
100nF
ZXF36L01
Filter AC Performance
Notch Pass Filter 2 Gain Response
30
20
10
0
-10
-20
-30
1
10
100
1000
Frequency (Hz)
10000
120
90
60
30
0
-30
-60
-90
-120
1
Notch Pass Filter 2 Phase Response
10
100
1000
Frequency (Hz)
10000
1
fo = 2πRC
Q ∝ (Rf / Ri)
Where R, Ri and Rf ≥10kΩ and C ≥ 50 pF
See “Designing for a Value of Q” for more
details.
The skirt ‘roll off’ away from the peak is
-20dB/decade regardless of chosen Q.
Typical responses for the circuit with
component values shown in circuit diagram.
ISSUE 3 - JANUARY 2002
7
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