Block Diagrams - Samsung SGH-X640 Service Manual

5. Block Diagrams

1. RF Solution Block Diagram
HITACHI METAL ANT SWITCH
SHS-C090T (4.5X3.2)
Imax = 10 mA
Freq (MHz ) Loss
880 - 915 1.2 dB
925 - 960 0.9 dB
1710 -1785 1.2 dB
1805 -1880 1.2 dB
1930 -1990 1.2 dB
FE_SW1
FE_SW2
PCS RX ON
RFMD PAM
RF5146 7x7
= 58%
GSM: Pout = 35.0 dBm E
ff
DCS: Pout = 33.0 dBm E = 52%
ff
PCS: Pout = 32.0 dBm E = 55%
ff
SGH-X640 RF Block Diagram
FUJITSU EGSM RX SAW Filter
FAR F5EB-942M50-B28CH
IL=2.7dB max
Ripple=1.7 dB max
FUJITSU DCS RX SAW Filter
FAR-F6EB-1G8425B2BW
IL= 2.3dB max
Ripple= 2.0dB max
FUJITSU PCS RX SAW Filter
FAR-F6EB-1G9600B2BW
IL= 2.8dB max
Ripple= 1.6dB max
Discrete
3 rd Order
Loop Filter
OFFSET Mixer input power
-16dBm max, -22dBm min
pi -PAD
Vcc_Tx_BURST
VBAT
Discrete
3 rd Order
Loop Filter
GSM IN
~
pi -PAD
VRAMP
~
GSM S/W
TX ENABLE
BAND SELECT DCS, PCS S/W
MURATA TX VCO
pi -PAD MQW510C869M
(5.5 4.8
X
DCS/PCS IN
GSM = 824 ~ 915 MHz
(Vt=0.5V ~ 3.0 V )
DCS,PCS = 1710 ~ 1910 MHz
(Vt=0.5V ~ 3.0 V )
Pout= 6.5 3dBm typ.,Ic <= 33mA
Harmonics <= -15dBc
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QUAD
VREG
DIV
Vcc_RF_LO
Vcc_RF_VCO
~
GSM/DCS/PCS
CP
FE_SW1
FE_SW2
CP
PFD
Philips Transceiver
UAA3536
1.5 mm)
X
5-1
VREG
FracN
DIV
f =26MHz
compRF
PFD
I+
DIV
1:1/2
QUAD
fmod
I-
3W
f
TXIF
BUS
60/114MHz
Q+
CTL
REG
Q-
PWR
EN
Pins IA,IB,QA and QB
V : 1.25V . , 1.15V , 1.35V
IQ typ min max
V : 0.5V
mod pp
+ I OUT
- I OUT
100 kHz+fmod
+ Q OUT
- Q OUT
Vcc_SYN
Vcc_REF(2.4V typ.)
VTCXO
REFIN
TCO-5871U
26MHz
REF_13M
DATA
CLK
EN
RXON
TXON
SYNON
FESWON