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參數(shù)資料
| 型號： | LMV716MMX |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運動控制電子 |
| 英文描述： | 5 MHz, Low Noise, RRO, Dual Operational Amplifier with CMOS Input |
| 中文描述： | DUAL OP-AMP, 5000 uV OFFSET-MAX, 5 MHz BAND WIDTH, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數(shù)： | 12/15頁 |
| 文件大小： | 953K |
| 代理商： | LMV716MMX |
Application Information
(Continued)
High Pass Filter
The transfer function of a high pass filter can be derived in
much the same way as the previous example. A typical first
order high pass filter is shown below:
Writing the KCL for this circuit :
(V
1
denotes the voltage between C and R
1
)
(12)
(13)
Solving these two equations to find the transfer function and
using:
(high frequency gain)
Which gives:
and
(14)
Looking at the transfer function, it is clear that when f/f
is
small, the capacitor is open and therefore, no signal is
getting to the amplifier. As the frequency increases the am-
plifier starts operating. At f = f
O
the capacitor behaves like a
short circuit and the amplifier will have a constant, high
frequency gain of H
O
.
Figure 10
shows the transfer function
of this high pass filter.
Band Pass Filter
Combining a low pass filter and a high pass filter will gener-
ate a band pass filter.
Figure 11
offers an example of this
type of circuit.
In this network the input impedance forms the high pass filter
while the feedback impedance forms the low pass filter. If the
designer chooses the corner frequencies so that f
1
<
f
2
, then
all the frequencies between, f
1
≤
f
≤
f
2
, will pass through the
filter while frequencies below f
1
and above f
2
will be cut off.
The transfer function can be easily calculated using the
same methodology as before and is shown in
Figure 12
.
(15)
20179559
FIGURE 8. Low Pass Filter Transfer Function
20179560
FIGURE 9. High Pass Filter
20179564
FIGURE 10. High Pass Filter Transfer Function
20179566
FIGURE 11. Band Pass Filter
L
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相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| LMV716MMX/NOPB | 功能描述:運算放大器 - 運放 RoHS:否 制造商:STMicroelectronics 通道數(shù)量:4 共模抑制比（最小值）:63 dB 輸入補償電壓:1 mV 輸入偏流（最大值）:10 pA 工作電源電壓:2.7 V to 5.5 V 安裝風格:SMD/SMT 封裝 / 箱體:QFN-16 轉換速度:0.89 V/us 關閉:No 輸出電流:55 mA 最大工作溫度:+ 125 C 封裝:Reel |
| LMV717A EA WAF | 制造商:Texas Instruments 功能描述: |
| LMV721 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
| LMV721_06 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:10MHz, Low Noise, Low Voltage, and Low Power Operational Amplifier |
| LMV7219 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:7 nsec, 2.7V to 5V Comparator with Rail-to-Rail Output |
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