Block Diagrams - Samsung SGH-X490 Service Manual

5. Block Diagrams

5-1. RF Solution Block Diagram
HITACHI METAL ANT S/W
ESHS-C090T
Imax = 8 mA
Freq (MHz) Loss(typ.)
880 - 915 1.2 dB
925 - 960 0.8 dB
1710 -1910 1.5 dB
1805 -1880 1.2dB
1930 -1990 1.2dB
Atten 2xfo : 43dB,26dB(GSM,DCS/PCS)
3xfo : 40dB,26dB(GSM,DCS/PCS)
Vc_GSM Vc_DCS Vc_PCS
GSM_TX_MODE_SW
DCS/PCS_TX_MODE_SW
PCS_RX_MODE_SW
VCC_RX_TX
Micro Devices Quadband PAM
GSM: Pout = 34.2 dBm , E = 55%
DCS: Pout= 32.0 dBm , E = 55%
PCS: Pout= 32.0 dBm , E = 52%
EPCOS GSM RX SAW Filter
B7845 (2.0X1.4)
IL=1.4dB typ 1.5dB max
Ripple=0.5dB typ 0.6dB max
EPCOS DCS RX SAW Filter
B7852 (2.0X1.4)
IL=1.5dB typ 2.1dB max
Ripple=0.5dB typ 1.0dB max
EPCOS PCS RX SAW Filter
B7851 (2.0X1.4)
IL=1.4dB typ 2.1dB max
Ripple=0.5dB typ 1.0dB max
(2.7V)
Inverter
circuits
Discrete
rd
3 Order
Loop Filter
fc = ?
kHz
OFFSET Mixer input power
-16dBm max, -22dBm min
Vcc_Tx_BURST
(2.7V)
~
~
DCS/PCS S/W
삼성전기 TX VCO SEM
GSM
VOT1810F27KRA (6.0X5.0X1.7)
GSM = 880 ~ 915MHz
(Vt=0.5V ~ 3.0V )
Tuning Sensitivity = 55±11MHz/V
DCS = 1710 ~ 1785MHz
VAPC
(Vt=0.5V ~ 3.0V )
DCS/PCS
Tuning Sensitivity = 115±23 MHz/V
Pout= 6.5±3 dBm typ.,Ic <= 30mA
VBAT Harmonics <= -10dBc
RF3146 (7 X 7)
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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
GSM S/W
UAA3536
VCC_SYN (2.7V , 100mA )
RF1_VDD
VCC_RX_TX (2.7V ,100mA )
RF2_VDD
VCC_RF_VCO (2.7V , 100mA )
RF1_VDDS
VCC_TX_BURST (2.7V , 100mA )
RF2_VDDS
VCC_CP (4.0V , 25mA )
HV
S
5-1
Pins IA,IB,QA and QB
V I
Q
V
mod
+ I OUT
-
100 kHz+fmod
+
-
Vcc_SYN
VREG
FracN
DIV
Vcc_REF(2.4V typ.)
f =26MHz
compRF
REFIN
PFD
I+
DIV
1:1/
QUAD
2
fmod
I-
3W
f
TXIF
BUS
60MHz
CTL
Q+
REG
Q-
PWR
EN
VBat (3.6V typ 3.0V min)
PON_TX
PON_SYNT
PMU
V_MODE
AVDD(1.35V min 2.65V max , 100mA )
VDD1 (1.35V min 2.95V max , 150mA )
VDD2 (1.35V min 3.45V max , 150mA )
VDD3 (1.35V min 3.45V max , 100mA )
VDD4 (1.35V min 3.45V max , 150mA )
: 1.25V ty . , 1.15V mi , 1.35V
max
p n
: 0.5V p
p
I OUT
Q OUT
Q OUT
VC-TCXO
26MHz
DATA
CLK
EN
RXON
TXON
SYNON
FESWON