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MF10 датащи(PDF) 9 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
номер детали MF10
подробное описание детали  Universal Monolithic Dual Switched Capacitor Filter
PDF  20 Pages
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производитель  NSC [National Semiconductor (TI)]
домашняя страница  http://www.national.com
Logo NSC - National Semiconductor (TI)

MF10 датащи(HTML) 9 Page - National Semiconductor (TI)

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20 Modes of Operation
The MF10 is a switched capacitor (sampled data) filter To
fully describe its transfer functions a time domain approach
is appropriate Since this is cumbersome and since the
MF10 closely approximates continuous filters the following
discussion is based on the well know frequency domain
Each MF10 can produce a full 2nd order function See Ta-
ble I for a summary of the characteristics of the various
modes
MODE 1 Notch 1 Bandpass Lowpass Outputs
fnotch e fO (See Figure 7 )
fO
e
center frequency of the complex pole pair
e
fCLK
100
or
fCLK
50
fnotch e center frequency of the imaginary zero pair e fO
HOLP e Lowpass gain (as f
x 0) eb
R2
R1
HOBP e Bandpass gain (at f e fO) eb
R3
R1
HON e Notch output gain as
f
x 0
f
x fCLK 2
( e bR2
R1
Q
e
fO
BW
e
R3
R2
e
quality factor of the complex pole pair
BW
e
the b3 dB bandwidth of the bandpass output
Circuit dynamics
HOLP e
HOBP
Q
or HOBP e HOLP c Q
e
HON c Q
HOLP(peak) j Q c HOLP (for high Q’s)
MODE 1a Non-Inverting BP LP (See
Figure 8 )
fO
e
fCLK
100
or
fCLK
50
Q
e
R3
R2
HOLP eb1 HOLP(peak) j Q c HOLP (for high Q’s)
HOBP1eb
R3
R2
HOBP2e 1 (Non-Inverting)
Circuit Dynamics HOBP1 e Q
Note
VIN should be driven from a low impedance (k1kX) source
TLH10399 – 16
FIGURE 7 MODE 1
TLH10399 – 17
FIGURE 8 MODE 1a
9



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