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參數(shù)資料
| 型號(hào)： | SP431 |
| 廠(chǎng)商： | Intersil Corporation |
| 英文描述： | Serial I/O Filter |
| 中文描述： | 串行I / O過(guò)濾器 |
| 文件頁(yè)數(shù)： | 9/17頁(yè) |
| 文件大?。?/td> | 144K |
| 代理商： | SP431 |
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FIGURE 10A. BLOCK DIAGRAM OF FIXED COEFFICIENT
HALFBAND FILTERS
BITS2-0
100
0
1
1
1
1
101
1
1
1
1
1
010
0
0
0
1
1
011
0
0
1
1
1
000
0
0
0
0
0
001
0
0
0
0
1
MUX1 = (BIT2 AND BIT0) AND BIT1
MUX2 = BIT2
MUX3 = (BIT1 AND BIT0) OR BIT2
MUX4 = BIT1 OR BIT2
MUX5 = BIT0 OR BIT1 OR BIT2
INVALID = BIT2 AND BIT1
MULTIPLEXERS’ DECODER TABLE AND EQUATIONS
MUX5
MUX4
MUX3
MUX2
MUX1
HB5
HB4
HB3
HB2
HB1
INPUT TO
HALFBAND
SECTION
F
NORMALIZED
= F
s
F
s
F
HB1
= F
s
or F
s
/2
F
s
/2
F
HB1
/2
F
HB2
= F
HB1
or F
HB1
/2
F
NORMALIZED
= F
HB1
F
HB3
= F
HB2
or F
HB2
/2
F
HB2
/2
F
NORMALIZED
= F
HB2
F
HB3
/2
F
NORMALIZED
= F
HB3
F
HB4
= F
HB3
or F
HB3
/2
F
HB4
/2
F
NORMALIZED
= F
HB4
OUTPUT OF
HALFBAND SECTION
0
1
MUX5
MUX4
MUX3
MUX2
MUX1
0
1
0
1
0
1
0
1
35 TAP
23 TAP
19 TAP
11 TAP
7 TAP
FIGURE 10B. SPECTRAL COMPOSITION OF FIVE CASCADED
HALFBANDS
FIGURE 10C. COMPOSITE RESPONSE OF FIXED COEFFI-
CIENT HALFBAND FILTERS WITH RESPECT TO
THE NORMALIZED FREQUENCY SHOWN IN FIG-
URE 10A
FCLK
4
FCLK
2
3FCLK
4
FCLK
FCLK
2
FCLK
2
F
S
2
F
S
2
FCLK
4
FCLK
4
FCLK
4
FCLK
4
FCLK
8
FCLK
8
FCLK
8
FCLK
16
FCLK
8
FCLK
16
FCLK
FCLK
FCLK
FCLK
FCLK
FCLK
32
FCLK
32
FCLK
64
FCLK
64
STAGE 1
STAGE 2
STAGE 3
STAGE 4
STAGE 5
POSITE
FILTER
COM-
-120
-140
-160
-180
-200
0
0.125
0.25
0.375
0.5
M
-60
-40
-20
-80
-100
6dB BANDWIDTH
HB1 TRANSITION BW
HB2
HB3
HB4
HB5
NORMALIZED FREQUENCY
(NORMALIZED TO OUTPUT FREQUENCY)
HSP43124
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