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NEC DB2000 Service Manual page 128

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M5-TY0428
W2013 INDIRECT QUADRATURE
MODULATOR
VCC
FILTA
FILTB
I
I
Q
Q
LO1REF
LO1
GND
I
I
LO1
LO1REF
Q
Q
W2013 BLOCK DIAGRAM
1
2
3
4
5
6
7
8
9
10
EXTERNAL
FILTER
LO2 LO2REF
20
VCC
19
RF
OUT
18
GND
17
GND
16
ENB/APC
15
GND
GND
14
13
LO2REF
12
LO2
11
GND
RF
OUT
RF
OUT
VOLTAGE
POWER
REF
CONTROL
VCC
ENB/APC
IC100
GND

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