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SGH-N620E Block Diagrams
5-4
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4. RF Receive Part
DCS RX
1805 ~ 1880 MHz
(CH62:1842.4 MHz)
Si4200F (U302)
①
I
Q
SDATA
SCLK
SENB
VP40578
(U205)
PDNB
②
AFC
③
Si4201-BM (U304)
CHANNEL
FILTER
DAC
DAC
PGA
PGA
100
KHz
/
/
/
/
/
/
Mixer
PGA
PGA
ADC
ADC
LNA
LNA
/
/
/
/
/
/
GSM : /2
Si4133T-BM (U305)
RF
PLL
OSC301
VCTCXO
U301
ANTTENA
S/W
F301
SAW
FILT
ER
F302
SAW
FILT
ER
CN301
RF
CONNECTOR
-50dBm
@947.067 MHz
-50dBm
@1842.467 MHz
2
3
8
10
1
EGSM RX
925 ~ 960 MHz
(CH62:947.4 MHz)
-51dBm
-50dBm
-52dBm
-52dBm
21,22
17,18
3,4
3,4
1
1
1,2
1,2
11,12
11,12
④
-50dBm
-54dBm
@67KHz
5
4
3
2
-6dBm
@1895.6 MHz (G)
-9dBm
@1842.3 MHz (D)
23,24
<EGSM>
1849.8 ~ 1919.8 MHz
<DCS>
1804.9 ~ 1879.9 MHz
12,13
31
9
7
14
4
2
7