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4-2
Block Diagrams
4-2 Main RF
Antenna
S/W
(U203)
Bias
Circuit
APCIC
(U611)
LNA
2nd
Dual
SA
W
Filter
Mix
er 1
Mix
er 2
IF
SA
W
Filter
225 MHz
LC
Filter
45 MHz
PGA
I&Q
Demod.
IRXP
IRXN
QRXP
QRXN
SYNTHD
A
T
A
SYNTHCLOCK
A
GCLE
RXEN1
RXEN2
TXEN
ITXP
ITXN
QTXP
QTXN
EGSM
925~960 MHz
(CH62 : 947.4 MHz)
DCS
1805~1880 MHz
(CH698 : 1842.4 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)
DCS
1710 ~ 1785 MHz
(CH698 : 1747.4 MHz)
F204
HD155128TF
(U454)
F200
C212
L200
VP40575
(U618)
1st
Dual SA
W
Filter
F203
LNA
Serial data
Interface
Loop
Filter
Dual
Coupler
(U318)
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
EGSM : 270 MHz
DCS : 135 MHz
EGSM :
1150 ~ 1185 MHz
DCS :
1580 ~ 1655 MHz(Rx)
1575 ~ 1650 MHz(Tx)
RF
Conector
(CN1)