4-2
SGH-R225 Block Diagrams
4-2 Main RF
Antenna
S/W
(U203)
Bias
Circuit
APCIC
(U611)
LNA
2nd
Dual
SA
W
Filter
Mixer 1
Mixer 2
IF
SA
W
Filter
225 MHz
LC
Filter
45 MHz
PGA
I&Q
Demod.
IRXP
IRXN
QRXP
QRXN
SYNTHDATA
SYNTHCLOCK
AGCLE
RXEN1
TXEN1
ITXP
ITXN
QTXP
QTXN
EGSM
925~960 MHz
(CH62 : 947.4 MHz)
PCS
1930~1990 MHz
(CH661 : 1960 MHz)
1080 MHz
DCS : 270 MHz
EGSM : 540 MHz
I&Q
Mod.
45 MHz
270 MHz
EGSM : 270 MHz
DCS : 135 MHz
Phase
Detector
TX VCO
(U200)
EGSM
880 ~ 915 MHz
(CH62 : 902.4 MHz)
PCS
1850 ~ 1910 MHz
(CH661 : 1880 MHz)
F204
HD155128TF
(U454)
F200
C212
L200
VP40553-2
(U618)
1st
Dual SA
W
Filter
F203
LNA
Serial data
Interface
Loop
Filter
Dual P
A
M
(U476)
VCTCXO
(13MHz)
(U100)
PLL1
PLL2
SI4133-XM2
(U478)
RF VCO
IF VCO
1/2
1/2
90 deg
Shift
1/2
1/6
90 deg
Shift
1/2
DGSM : 270 MHz
DCS : 135 MHz
EGSM : 1150 ~ 1185 MHz
PCS : 1705 ~ 1765 MHz(Rx)
1715 ~ 1775 MHz(Tx)
RF
Conector
(CN1)
Coupler
Coupler
(U623)
(U622)