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

PDF

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