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MF6 데이터시트(PDF) 17 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
부품명 MF6
상세설명  6th Order Switched Capacitor Butterworth Lowpass
PDF  20 Pages
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제조업체  NSC [National Semiconductor (TI)]
홈페이지  http://www.national.com
Logo NSC - National Semiconductor (TI)

MF6 데이터시트(HTML) 17 Page - National Semiconductor (TI)

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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
c) cycles. As shown in Figure 17,ifthe
control signal is low the MF6-50 has a 100 kHz clock making
f
c = 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
c and thus the fCLK 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
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