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參數資料
| 型號： | MAX7491 |
| 廠商： | Maxim Integrated Products, Inc. |
| 英文描述： | Dual Universal Switched-Capacitor Filters |
| 中文描述： | 雙路、通用開關電容濾波器 |
| 文件頁數： | 11/18頁 |
| 文件大?。?/td> | 343K |
| 代理商： | MAX7491 |
M
Dual Universal Switched-Capacitor Filters
______________________________________________________________________________________
11
have to track Q). The notch and bandpass center fre-
quencies are identical. The notch output gain is the
same above and below the notch center frequency.
Mode 1 can also be used to make high-order Butter-
worth lowpass filters, low Q notches, and multiple-order
bandpass filters obtained by cascading identical
switched-capacitor sections.
Mode 1 Design Equations
Mode 1B
Figure 3 shows the configuration of Mode 1B. R5 and
R6 are added to lower the feedback voltage from the
lowpass output to the summing input. This allows the
clock-to-center frequency to be adjusted beyond the
nominal value. This mode essentially has the same
functions and speed as Mode 1 while providing a high-
Q with f
CLK
/f
O
ratios greater than the nominal value.
Mode 1B Design Equations
Mode 2
Figure 4 shows the configuration of Mode 2. Mode 2 is
a combination of Mode 1 and Mode 3. In this mode,
f
CLK
/f
O
is always less than the part
’
s nominal ratio.
However, it provides less sensitivity to resistor toler-
ances than does Mode 3. It has a highpass notch out-
put where the notch frequency depends solely on the
clock frequency.
f
f
R
+
6
R
R
f
f
Q
R
R
R
+
6
2
1
3
1
R
R
R
R
R
R
6
H
R
R
R
H
H
as f
(
Hz
0
R
R
H
at f
(
f
R
R
O
CLK
100
n
O
OLP
OBP
ON
ON
CLK
=
=
=
=
+
=
→
=
=
=
6
5
3
2
6
5
5
6
2
1
2
2
1
1
2
)
/ )
f
f
f
f
Q
R
R
H
R
R
R
R
H
H
as f
(
Hz
0
R
R
H
at f
(
f
R
R
O
CLK
100
notch
O
OLP
OBP
ON
ON
CLK
=
=
3
2
=
=
=
→
=
=
=
2
1
3
1
2
1
2
2
1
1
2
)
/ )
Σ
∫
∫
LP
BP
S
N
R3
R2
R1
V
IN
C
C
COM
+
-
Figure 2. Mode 1, 2nd-Order Filter Providing Notch, Bandpass,
and Lowpass Outputs
Σ
∫
∫
LP
BP
S
N
R3
R6
R5
R2
R1
V
IN
C
C
COM
COM
+
-
Figure 3. Mode 1B, 2nd-Order Filter Providing Notch, Bandpass,
and Lowpass Outputs
相關PDF資料 |
PDF描述 |
|---|---|
| MAX7490-MAX7491 | Dual Universal Switched-Capacitor Filters |
| MAX7491CEE | SILICON CONTROLLED RECTIFIER,400V V(DRM),70A I(T),TO-209AA RoHS Compliant: Yes |
| MAX7490CEE | Dual Universal Switched-Capacitor Filters |
| MAX7490EEE | Dual Universal Switched-Capacitor Filters |
| MAX7491EEE | 4-Bit D-type Registers with 3-State Outputs 16-CDIP -55 to 125 |
相關代理商/技術參數 |
參數描述 |
|---|---|
| MAX7491CEE | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491CEE+ | 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491CEE+T | 功能描述:有源濾波器 Dual Universal Switched-Cap RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491CEE-T | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
| MAX7491EEE | 功能描述:有源濾波器 RoHS:否 制造商:Maxim Integrated 通道數量:1 截止頻率:150 KHz 電源電壓-最大:11 V 電源電壓-最小:4.74 V 最大工作溫度:+ 85 C 安裝風格:Through Hole 封裝 / 箱體:PDIP N 封裝:Tube |
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