FLY BIRD FT20
Circuit Diagrams

RF Block Diagram
LNA B7706 PGA

ADC CHANNEL F ILTER

PGA

DAC

RXIP RXIN

LMG002S-5047A

LNA

PGA

ADC
100kHz

PGA

DAC

RXQP RXQN

SAPSD1G84

ANT. S/W

¢³ /2

GSM Tx : 1279.2 ~ 1313.8MHz GSM Rx : 1850.2 ~ 1919.4MHz DCS Tx : 1327.2 ~ 1401.8MHz DCS Rx : 1805.1 ~ 1879.7MHz

Si4201
Si4134T

S/W

RF PLL
EGSM Tx IF : 880.2~894.8 :798MHz 900. 2~914.8 : 798MHz 895~900 : 790MHz

SYN/CLK SYN/DATA SYN/EN
X-TAL [ N X402 5 D A ] 13MHz

IF PLL DCXO

PA_ON BSW

DCS Tx IF : 766MHz

/2 ¥� DET

PDB TXIP TXIN SDI SDO

RF3133

/1,2

TXQP TXQN RF_ENA XO_ENA BSW
VBAT PA_ON

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