MF10CCWM National Semiconductor, MF10CCWM Datasheet - Page 10

• Manufacturer Part Number: MF10CCWM
• Description: IC,FILTER,AP/BP/HP/LP/NOTCH,CMOS,SOP,20PIN,PLASTIC
• Manufacturer: National Semiconductor

Specifications of MF10CCWM

• Rohs Compliant: NO

2 0 Modes of Operation
MODE 2 Notch 2 Bandpass Lowpass f
(See Figure 9 )
f
f
Q
H
H
H
H
Filter dynamics H
problem connect a small capacitor (10 pF
O
notch
In Mode 3 the feedback loop is closed around the input summing amplifier the finite GBW product of this op amp causes a slight Q enhancement If this is a
OLP
OBP
ON 1
ON 2
e
e
e
e
e
e
e b
e
e
e b
e
Notch output gain as f
center frequency
f
f
quality factor of the complex pole pair
Lowpass output gain (as f
Bandpass output gain (at f
Notch output gain (as f
100
100
CLK
CLK
R2 R4
R2 R4
R2 R4
R2 R3
R2 R1
R2 R1
or
R2
R4
a
f
OBP
CLK
50
a
a
a
1
1
1
1 or
e
Q H
f
CLK
50
OLP
b
H
R2
R4
ON 2
100 pF) across R4 to provide some phase lead
e
f
0)
CLK
a
2
f
(Continued)
O
0)
e
1
)
notch k
e b
e b
H
ON1
R3 R1
R2 R1
f
H
O
ON2
FIGURE 10 MODE 3
FIGURE 9 MODE 2
10
MODE 3 Highpass Bandpass Lowpass Outputs
(See Figure 10 )
f
Q
H
H
H
Circuit dynamics
H
H
O
OHP
OBP
OLP
OLP(peak)
OHP(peak)
e
e
e
e
e
e
f
Highpass Gain as f
Lowpass Gain at f
Lowpass Gain as f
quality factor of the complex pole pair
100
CLK
R2
R4
j Q
j Q
c
c
R2
R4
H
c
R3
R2
c
R2
R4
OBP
H
H
e
OLP
OHP
or
e
H
H
OHP
OLP
f
(for high Q’s)
CLK
50
(for high Q’s)
H
e
OHP c
c
f
O
f
TL H 10399 – 18
TL H 10399 – 19
CLK
0
2
R2
R4
H
e b
OLP c
e b
e b
R3
R1
R4
R1
R2
R1
Q