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参数资料
| 型号： | MF6CWM-50 |
| 厂商： | NATIONAL SEMICONDUCTOR CORP |
| 元件分类： | 运动控制电子 |
| 英文描述： | 6th Order Switched Capacitor Butterworth Lowpass |
| 中文描述： | SWITCHED CAPACITOR FILTER, BUTTERWORTH, LOWPASS, PDSO14 |
| 封装： | SO-14 |
| 文件页数： | 17/20页 |
| 文件大小： | 861K |
| 代理商： | MF6CWM-50 |
2.0 Designing with the MF6
(Continued)
2.4 CHANGING CLOCK FREQUENCY
INSTANTANEOUSLY
The MF6 will respond favorably to a sudden change in clock
frequency. Distortion in the output signal occurs at the tran-
sition of the clock frequency and lasts approximately three
cutoff frequency (f
) cycles. As shown in Figure 17 if the
control signal is low the MF6-50 has a 100 kHz clock making
f
= 2 kHz; when this signal goes high the clock frequency
changes to 50 kHz yielding 1 kHz f
c
.
The transient response of the MF6 seen in Figure 18 is also
dependent on the f
and thus the f
applied to the filter.
The MF6 responds as a classical sixth order Butterworth
lowpass filter.
DS005065-28
FIGURE 15. “Notch” Filter
DS005065-29
FIGURE 16. MF6-50 “Notch” Filter Amplitude Response
www.national.com
17
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