User Guide

Block Diagrams 4-3
4-2-1 RF Transmit Part
a b c
de
U305
HD155128TF
Antenna
S/W
U304
U108
VP40575
TXEN
RAMPDAC BAND Selection - GSM : Low - DCS : High
ITXP
ITXN
QTXP
QTXN
Loop
Filter
TX VCO
U200
Dual PAM
U312
APC Circuit
Coupler
153
1 3
7
5
U318
U318
8
8
13 7
2
540 MHz
PCN : 1575 ~ 1650 MHz (Tx)
GSM : 1150 ~ 1185 MHz
41411
1
2
34
5
38 35 20 19
18
17
30 47
10
6
8 14
2 5
2
1
Ant. S/W
Control
Circuit
3VTX TXEN2
VC1 VC2 VC3
VC3VC2VC1
GSM(Tx)
DCS(Tx)
Rx
H
H
H
LL LL
LL
11
SI4133-MLP28
U302
VCTCXO
13MHz
U303
IF VCO
1080MHz
PLL1
PLL2
RF VCO
AFCDAC
10 23
15
880 ~ 915MHz(EGSM) 890 ~ 915MHz(PGSM)
1710 ~ 1785MHz(DCS)
HD155128TF
U454
Antenna
S/W
U203
VP405575
U618
TXEN1
RAMPDAC BAND Selection - GSM : Low - DCS : High
ITXP
ITXN
QTXP
QTXN
Loop
Filter
TX VCO
U200
Dual PAM
U476
TXEN1
BAND Selection
RAMPDAC
17 18 19 20 38 35
30 47
23
11
153
7
10
6
8 1
5 4
17
2
5
3
1080 MHz
3VTX TXEN2
4,958
VC1 VC2
211
8
RF
Conector
(CN1)
10
1080 MHz
VCTCXO
(13MHz)
(U100)
PLL1 PLL2
SI4133-XM2
(U478)
RF VCO
IF VCO
APCIC
(U611)
Dual
Coupler
(U318)
VC2VC1
Tx(GSM)
Tx(DCS)
Rx
H
H
L
L LL
Ant. S/W
Control
Circuit
3 2
DCS
1710 ~ 1785 MHz
(CH698 : 1747.4 MHz)
EGSM
880 ~ 915 MHz
(CH62 : 902.4 MHz)
53 8
GSM : 1150 ~ 1185 MHz DCS : 1580 ~ 1655 MHz(Rx) 1575 ~ 1650 MHz(Tx)
1
2
3
4
5