VCA810_16 Datasheet, PDF (29/40 Pages) Texas Instruments – VCA810 High Gain Adjust Range, Wideband and Variable Gain Amplifier

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Application Information (continued)
VCA810
SBOS275G – JUNE 2003 – REVISED DECEMBER 2015
C
0.047mF
nR
5kW
V_I
R
330W
C
0.047mF
1/2
OPA2822
nR
5kW
1/2
OPA2822
V_O
50W
R
330W _VOA
VCA810
50W
V_C
Figure 45. Tunable Band-Pass Filter
V_{O =}
-^s
nRC
V_I
s²
+
s
nRC
+
G
R²C²
10^{-(VC + 1)}
f_O = _2pRC
BW =
1
2pRC
Q = n·10^{-(VC + 1)}
A_O = -1
0
-5
-10
-15
-20
-25
-30
-35
-40
-45
-50
100
1k
10k
Frequency (Hz)
100k
Figure 46. Tunable Band-Pass Filter Response
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