SSI32F8030 Datasheet, PDF (9/10 Pages) List of Unclassifed Manufacturers – Programmable Electronic Filter

SSI 32F8030
Programmable
Electronic Filter
TABLE 1: 32F8030 Frequency Boost Calculations - K = 1.31703 (10^{BOOST (dB) / 20} -1)
Assuming 9.2 dB boost for
VBP = VR
( ) _{VBP â‰} ^{10(FB/20) − 1}
VR
1.884
Boost
K
1 dB
0.16
2 dB
0.34
3 dB
0.54
4 dB
0.77
5 dB
1.03
or,
boost in dB = 20log ^{}1.884 ^{ VVBRP} +1^{}
VBP/VR
0.1
0.2
0.3
0.4
0.5
VBP/VR
0.065
0.137
0.219
0.310
0.413
Boost
1.499 dB
2.777 dB
3.891 dB
4.879 dB
5.765 dB
Boost
6 dB
7 dB
8 dB
9 dB
K
VBP/VR
1.31
0.528
1.63
0.657
1.99
0.802
2.40
0.965
VBP/VR
0.6
0.7
0.8
0.9
1.0
Boost
6.569 dB
7.305 dB
7.984 dB
8.613 dB
9.200 dB
TABLE 2: Calculations
Typical change in
ƒ-3 dB point
with boost
Boost (dB) Gain @ ƒc(dB) Gain @ peak(dB) ƒpeak/ƒc
0
-3
1
-2
2
-1
3
0
4
1
5
2
6
3
7
4
8
5
9
6
0.00
no peak
0.00
no peak
0.00
no peak
0.15
0.70
0.99
1.05
2.15
1.23
3.41
1.33
4.68
1.38
5.94
1.43
7.18
1.46
Notes: 1. ƒc is the original programmed cutoff frequency with no boost
2. ƒ-3 dB is the new -3 dB value with boost implemented
3. ƒpeak is the frequency where the magnitude peaks with boost implemented
i.e., ƒc = 2.5 MHz when boost = 0 dB
if boost is programmed to 5 dB then f-3 dB = 5.5 MHz
ƒpeak = 3.075 MHz
f-3 dB/ƒc
1.00
1.21
1.51
1.80
2.04
2.20
2.33
2.43
2.51
2.59
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