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HSP50210 Datasheet(PDF) 21 Page - Intersil Corporation

Part # HSP50210
Description  Digital Costas Loop
PDF  51 Pages
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Manufacturer  INTERSIL [Intersil Corporation]
Direct Link  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

HSP50210 Datasheet(HTML) 21 Page - Intersil Corporation

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FN3652.5
July 2, 2008
21
TABLE 9. BIT WEIGHTING IN THE CARRIER LOOP FILTER TO THE NCO - TRACKING
BIT
WEIGHT
φe
(AND
ACCOM.)
MANTISSA
GAIN
MULT
OUT
BITS
KEPT
(RND)
SHIFT = 0
SHIFT
≅ 32
SHIFT
COUNTS
NCO BIT
WEIGHT
OUTPUT
FREQUENCY
RESOLUTION
40
0fCLK
39
Obtained with a shift of 31 and a Gain of 01.1111 (~2)
→
(8)
- shift31
1
fCLK /2
38
7.
- shift31
2
fCLK /4
37
6
- shift30
3
fCLK /8
36
5
- shift29
4
fCLK /16
35
4
- shift28
5
fCLK /32
34
3
- shift27
6
fCLK /64
33
2
- shift26
7
fCLK /128
32
1
- shift25
8
fCLK /256
31
0
- shift24
9
fCLK /512
30
- shift23
10
fCLK /1024
29
- shift22
11
fCLK /2048
28
- shift21
12
fCLK /4096
27
- shift20
13
fCLK /8192
26
- shift19
14
fCLK /2
14
25
- shift18
15
fCLK /2
15
24
- shift17
16
fCLK /2
16
23
- shift16
17
fCLK /2
17
22
- shift15
18
fCLK /2
18
21
- shift14
19
fCLK /2
19
20
- shift13
20
fCLK /2
10
19
- shift12
21
fCLK /2
21
18
- shift11
22
fCLK /2
22
17
- shift10
23
fCLK /2
23
16
- shift9
24
fCLK /2
24
15
- shift8
25
fCLK /2
25
14
- shift7
26
fCLK /2
26
13
17
- shift6
27
fCLK /2
27
12
(12)
16
17
= (12)
(12)
- shift5
28
fCLK /2
28
11
(11)
15
16
= (11)
(11)
- shift4
29
fCLK /2
29
10
(10)
14
15
= (10)
(10)
- shift3
30
fCLK /2
30
9
(9)
13
14
= (9)
(9)
- shift2
31
fCLK /2
31
8
(8)
0
12
13
= (8)
(8)
- shift1
32
fCLK /2
32
7
7.
1.
11.
12.
= 7.
7.
- shift0
33
fCLK /2
34
66
x
10
11
= 6
6
34
fCLK /2
34
55
x
9
10
= 5
5
35
fCLK /2
35
44
x
8
9
= 4
4
36
fCLK /2
36
33
x
7
8
= 3
3
37
fCLK /2
37
22
6
7
= 2
2
38
fCLK /2
38
11
5
6
= 1
1
39
fCLK /2
39
00
4
5
= 0
0
40
fCLK /2
40
3
(RND)
2
1
0
HSP50210



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