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Mixer 1 Mixer 2 I .I PGA Q .Q I&Q Demo. Rx SAW filter IF SAW Filter (225MHz) LC Filter (45MHz) 45MHz bias circuit Serial data interface CLK SDATA LE GSM : 1150-1185MHz PCN : (Rx) 1580-1655MHz (Tx) 1575-1650MHz 270MHz RF VCO

1805-1880MHz

LNA

925-960MHz

3-1 RF Block Diagram

3. Block Diagram

LNA

Rx filter

Dual synth.

PLL1

HD155121F
÷2

90° Shift ÷2

PLL2 90MHz ÷6

Dip.

VC1 VC2 IF VCO 540MHz

DCS : 270MHz GSM : 540MHz

90° Shift ÷2

LPF

LPF

Ant. S/W

VCTCXO 13MHz

GSM : 270MHz DCS : 135MHz

GSM : 270MHz DCS : 135MHz

880-915MHz I .I Loop fitter Phase Detector I&Q Mod. Q .Q

1710-1785MHz

Directional Coupler

PA Module Tx VCO

APC

Block Diagram

Block Diagram
Voiceband/Baseband Codec (AD642d1) Flash ROM
I/Q BB Filter

3-2 Baseband Block Diagram

Head set Buzzer

Audio Interface
SPK Mic.

Batteru Voltage

Audio Interface
Battery Temperature

I,Q

System RAM

RF Interface

Ramp cont. AGC AFC

PLL

Graphic LCD

GSM Processor (AD6426) BB Interface

13Mhz Clock

Serial Data Interface
3V SYNTH

I/O Interface EEPROM

3V BRIGHT

SIM card Interface

+3V SIM Card +5V SIM Card

XVCC

Charging Circuit

3V TX

KeyPad
VCC

Li-on Battery (3.6V, 1000mAh)

DC/DC Converter

LDO Regulators

AVCC

RTC 3V3

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3-3
Rx filter Filter FET Switch FRT 4.1V 2nd Regulator Reference Voltage LED Overheat Protector MPU Battery Type Detector Charge Voltage Detector Charge Voltage Selector Feed Back Static Current Circuit Static Voltage Circuit FET Switch REAR 4.1V

3-3 DTC Block Diagram

INPUT 9V DC

Switching TR Circuit UVLO Overcurrent Protector

Block Diagram

Block Diagram

3-4 HFK Block Diagram

5V Regulator

Power (12V-28V)

Stabilizer

Power Control

DC/DC Regulator

Current Delector

Ignition

Voltage/Current Feed Back

Cradle

MICOM Data Communication EEPROM DSP TX Amp Calibration CODEC RX Amp Microphone

Volume Control

Audio Amp

Speaker

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