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3-12. IC BLOCK DIAGRAMS
• IC BLOCK DIAGRAMS
IC1
BU1922
16
15
QUALITY BIT
GENERATOR
DEFFERENTIAL
DECODER
1
2
IC701
uPC2581V
PROTECTOR
REG
DRIVE
1
2
3
IC401, IC500
LC7822
1
IN
2
3
OUT
4
5
IN
6
7
OUT
8
9
IN
10
OUT
11
12
VEE
CE
13
DI
14
CL
15
14
13
OSCILLATOR
RECONSTRUCTION
AND
FILTER
DIVIDER
BIPHASE
SYMBOL
DECODER
3
4
BIAS CIRCUIT
PRE
PRE
DRIVE
DRIVE
4
5
6
7
8
9
10
LEVEL SHIFT
LATCH
SHIFT RESISTOR
12
11
10
TEST LOGIC AND OUTPUT
SELECTOR SWITCH
57kHz
ANTI-
BANDPASS
ALIASING
(8th ORDER)
FILTER
CONTAS LOOP
CLOCKED
VARIABLE AND
COMPARATOR
FIXED DIVIDER
CLOCK REGENERATION
AND SYNC
VP1
REFERENCE
VOLTAGE
5
6
7
DRIVE
11
14
15
12
13
30
29
IN
28
27
OUT
26
25
IN
24
23
OUT
22
IN IN
21
20
OUT
19
VDD
18
RESET
17
S
16
VSS
— 27 —
9
8
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