4-3
Block Diagrams
4-2-1 RF Transmit Part
VCTCXO
(U504)
EGSM TX
880 ~ 915 MHz
(CH62 : 902.4 MHz)
DCS TX
1710 ~ 1785 MHz
(CH698 : 1747.4 MHz)
Antenna
S/W
(U605)
RF
Conector
(CN600)
VP40578
(U401)
Bryce Park
S
D
ATA
SCLK
SENB
PDNB
PD
LPF
Si4200 (U502)
I
Q
Dual P
A
M
(U600)
RF
PLL
Si4133-T
(U505)
AFC
+VBA
TT
Txpower
from U401
3VRF
8
TXEN
from U401
VC1
VC2
Ant. S/W
Control
Circuit
BAND Selection
VREG
<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
TXEN
Txpower
2
1
3VRI
BANDSEL
_BANDSEL
