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參數(shù)資料
| 型號： | MF6CWM-100 |
| 廠商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分類： | 運(yùn)動控制電子 |
| 英文描述： | 6th Order Switched Capacitor Butterworth Lowpass |
| 中文描述： | SWITCHED CAPACITOR FILTER, BUTTERWORTH, LOWPASS, PDSO14 |
| 封裝： | SO-14 |
| 文件頁數(shù)： | 16/20頁 |
| 文件大?。?/td> | 861K |
| 代理商： | MF6CWM-100 |
2.0 Designing with the MF6
(Continued)
2.3 IMPLEMENTING A “NOTCH” FILTER WITH THE MF6
A “notch” filter with 60 dB of attenuation can be obtained by
using one of the Op-Amps, available in the MF6, and three
external resistors. The circuit and amplitude response are
shown in Figures 15, 16
The frequency where the “notch” will occur is equal to the
frequency at which the output signal of the MF6 will have the
same magnitude but be 180 degrees out of phase with its in-
put signal. For a sixth order Butterworth filter 180 phase
shift occurs where f = f
= 0.742 f
. The attenuation at this
frequency is 0.12 dB which must be compensated for by
making R
1
= 1.014 x R
2
.
Since R
does not equal R
there will be a gain inequality
above and below the notch frequency. At frequencies below
the notch frequency (f
<<
f
), the signal through the filter
has a gain of one and is non-inverting. Summing this with the
input signal through the Op-Amp yields an overall gain of two
or +6 dB. For f
>>
f
, the signal at the output of the filter is
greatly attenuated thus only the input signal will appear at
the output of the Op-Amp. With R
=R
=1.014 R
the over-
all gain is 0.986 or 0.12 dB at frequencies above the notch.
DS005065-25
FIGURE 12. Cascading Two MF6s
DS005065-26
FIGURE 13. One MF6-50 vs. Two MF6-50s Cascaded
DS005065-27
FIGURE 14. Phase Response of
Two Cascaded MF6-50s
www.national.com
16
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MF6CWM-50 | 6th Order Switched Capacitor Butterworth Lowpass |
| MF6C | ORDER SWITCHED CAPACITOR BUTTERWORTH LOWPASS FILTER |
| MF6 | 6th Order Switched Capacitor Butterworth Lowpass |
| MFE1842BBU22 | Dielectric Filter with Attenuation Pole |
| MG-12232-3 | LCD MODULE |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MF6CWM-50 | 制造商:NSC 制造商全稱:National Semiconductor 功能描述:6th Order Switched Capacitor Butterworth Lowpass |
| MF6M | 制造商:GOOD-ARK 制造商全稱:GOOD-ARK Electronics 功能描述:Miniature Glass Passivated Single-Phase Bridge Rectifiers |
| MF6S | 制造商:GOOD-ARK 制造商全稱:GOOD-ARK Electronics 功能描述:Miniature Glass Passivated Single-Phase Bridge Rectifiers |
| MF-7 | 制造商:Velleman Inc 功能描述:Conn Power Adapter M/F 2/2 POS ST 1 Port Bulk |
| MF70 | 制造商:DYNEX 制造商全稱:Dynex Semiconductor 功能描述:Fast Recovery Diode |
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