3 Block Diagrams
3-1 Main RF
Block Diagrams
3-1
SA
W
DCS
GSM
GSMTX2
DCSTX2
RxEN_FEDCS
RxEN_FEGSM
U401
SA
W
F304
F303
F301
F302
U300
Q300
RxEGSM
(925~960MHz)
RxDCS(1805~1880MHz)
TxEGSM(880~915MHz)
TxDCS(1710~1785MHz)
U305
DUAL
COUPLER
U405
DET
.
DCSP
AM U408
TXPOWER
SA
W
SA
W
BPF
246MHz
F300
Dip.
RXLO1DCS
2051.2~2125.8MHz
BANDSEL
DEMODEN
EGSM:1
171.2~1216MHz
EGSM:493~518MHz
DCS:498~519MHz
DCS:310.8MHz
GSM:295.8MHz
DCS:2019.2~2125.8MHz
PLLEN
TXEN1
QRXP
IRXP
VMID
RXLO3
13MHz
TXEN1
DCSTX1
TXEN1
GSMTX2
DCSTX2
GSMP
AM U402
GSMTX1
Dip.
BPF
Mod.
QTX
REF
13MHz
QTXI
ITX
ITXI
VCO
LPF
U500
1/5
BPF
1/3
VCO
X501
X500
DUAL
PLL
DUAL
VCO
VCO
X2
Ref
Osc
BPF
U301
RXLO1GSM
1
171.2~1205.8MHZ
RXLO2
259MHz
F305
PLL
O˚
90˚
LNA
VGA
LNA
OP amp
PA
PA
3-2
Block Diagrams
3-2 Main Base Band
VCC
SYSTEM
CLOCK
SYSTEM
RAM 4M
FLASH
ROM 16M
EEPROM 128K
8M ROM (Voice
Recognition)
KeyPad
Graphic LCD
(115*60)
SIM Card
B.B Interface
POWER
Circuit
GSM/DCS
RF interface
Serial Data
Interface
+3V SIM Card
+5V SIM Card
Battery Voltage
Battery
Temperature
GSM PLL
3V Tx
AVCC
RF PSU
Multi
Switch
Array
I/O Interface
A/D Interface
I/O BB Filter
PLL
GSM/DCS
VOCODER
Memory
Charging Circuit
Li_lon Battery (3.6V)
GSM/DCS
KERNEL 5
DCS PLL
GSM Tx
DCS Tx
GSM PSU
DCS PSU
3-3
Block Diagrams
3-3 Travel Adapter
EMI FILTER
CIRCUIT
FIRST
RECTIFIRE
ISOLATION
POWER
TRANSFORMER
ISOLATION
OPTO COUPLER
O.C.P
POWER
SWITCHING
(MOS FET)
FEED BACK
P.W.M
CONTROL
SECOND
RECTIFIRE
FILTER
AC
INPUT
DC
INPUT
3-4
Block Diagrams
3-4 Desk Top Charger
CHOKE COIL
Switching TR
Circuit
UVLO
Overcurrent Protector
2nd Regulator
Reference
Voltage
Overheat
Protector
Feed Back
LED
MPU
Filter
FET Switch
INPUT
9V DC
FRT 4.1V
FET Switch
REAR 4.1V
Static Current Circuit
Static Voltage Circuit
Battery Type Detector
Charge Voltage Detector
Charge Voltage Selector