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4-2
Block Diagrams
4-2 Main RF
EGSM RX
925~960 MHz
(CH62 :
947.4 MHz)
DCS RX
1805~1880 MHz
(CH698 :
1842.4 MHz)
SA
W
Filter
F205
SA
W
Filter
F204
LNA
LNA
PGA
PGA
ADC
ADC
VCTCXO
(U100)
EGSM TX
880 ~ 915 MHz
(CH62 :
902.4 MHz)
DCS TX
1710 ~ 1785 MHz
(CH698 :
1747.4 MHz)
Dual P
A
M
(U476)
Antenna
S/W
(U203)
RF
Conector
(CN1)
Si4200 (U623)
RF
PLL
IF
PLL
Si4133T (U684)
PD
LPF
Mix
er
Channel
Filter
PGA
PGA
DA
C
DA
C
100
kHz
Si4201 (U685)
VP40578
(U467)
Br
yce P
a
rk
I
Q
I
Q
S
D
ATA
SCLK
SENB
PDNB