hsp50210 Intersil Corporation, hsp50210 Datasheet - Page 6

• Manufacturer Part Number: hsp50210
• Description: Digital Costas Loop
• Manufacturer: Intersil Corporation

HI/LO
REG
REG
FROM CARRIER TRACKING
BLANK = CLK RATE
REGISTER ENABLE RATE
NCO MIXER
@
*
LOOP FILTER
!
REG
REG
= SYMBOL RATE
= SYNC RATE
= TWICE SYMBOL RATE
COMPLEX
MULTIPLY
SIN/COS
ROM
REG
REG
+
BYPASS
REG
REG
MIXER
CF
REGISTER
R
G
R
G
E
E
R
E
G
R
E
G
R
E
G
R
E
G
M
U
X
@
@
ROOT RAISED COSINE
15 TAP RRC
15 TAP RRC
MATCHED FILTERING
BYPASS
(RRC)
RRC
R
G
R
G
E
E
R
E
G
R
E
G
M
U
X
M
L
T
I
I
R
E
G
R
E
G
@
AGC LOOP FILTER
FIGURE 3. MAIN DATA PATH
R
G
R
G
E
E
UPPER
OR
R
E
G
LIMIT
GAIN
!
DUMP
M
L
T
+
I
I
DUMP
+
LOWER
GAIN
LIMIT
M
U
X
M
U
X
R
E
G
“0”
+
DATA DE-SKEW
@
@
R
G
E
OQPSK
“0”
R
G
R
G
E
INTEGRATE AND DUMP
E
*
LOOP GAIN
EXPONENT
M
U
X
S
H
T
F
I
TWO SAMPLE
H
T
S
F
I
SUMMER
S
H
F
T
I
FALSE LOCK
*
R
G
E
SYMBOL SAMPLES
COMPARE
R
E
G
LOOP GAIN
*
MANTISSA
R
E
G
REG
MID AND END
+
+
HOLD AGC
M
U
X
M
U
X
“0”
POWER
THRESHOLD
GAIN
ERROR
TO SYMBOL TRACKING
M
M
D
E
U
X
D
E
U
X
AGC ERROR DETECT
M
U
X
MID
I
AGC THRESHOLD
PHASE OUT AT
END
MAG OUT AT
I
TAN
COMPARE
CARTESIAN TO
MID
I
+
Q
2
-1
+Q
POLAR
( )
END
-
Q
I
Q
2
DELAY
DELAY
@
REG
REG
@
DECISION
5
5
OR
TEST
SLICER
SOFT
OR
M
U
X
!
*
R
E
G
R
E
G
8
R
E
G
R
E
G
R
E
G
R
E
G
8
TO
CARRIER
TRACKING
AND
DISCRIMINATOR
R
E
G
O
U
P
U
S
E
E
C
T
T
L
T
THRESH
R
E
G
R
E
G