Block Diagrams
4-3
4-2-1 RF Transmit Part
VCTCXO
(U100)
EGSM TX
880 ~ 915 MHz
(CH62 :
902.4 MHz)
DCS TX
1710 ~ 1785 MHz
(CH698 :
1747.4 MHz)
Antenna
S/W
(U203)
RF
Conector
(CN1)
VP40578
(U467)
Br
yce P
a
rk
S
D
ATA
SCLK
SENB
PDNB
PD
LPF
Si4200 (U623)
I
Q
Dual P
A
M
(U476)
RF
PLL
Si4133-T (U684)
AFC
+VBA
TT
Txpo
w
e
r
from U467
3VRF
8
3VTX
TXEN2
from U467
VC1
VC2
Ant.
S/W
Control
Circuit
BAND Selection
VREG
BAND Selection
- GSM :
Lo
w
- DCS :
High
<EGSM>
1279 ~ 1314 MHz
<DCS>
1327 ~ 1402 MHz
-6dBm
@ 1301.4 MHz (G)
-9dBm
@ 1364.4 MHz (D)
21
1
53
9
11
7
1
24
25
5
6
7
8
31
4
2
7
26,27
23,24
12,13
9,10
IF
PLL
9
/2
<EGSM>
880~895 MHz :
798 MHz
895~900 MHz :
790 MHz
900~915 MHz :
798 MHz
<DCS>
766 MHz
-6dBm
@ 798 MHz
-9dBm
@ 766 MHz
1
2
3
VC2
VC1
Tx(GSM)
Tx(DCS)
Rx
L
L
H
H
LL
TXEN2
Txpo
w
e
r
2
1