Block Diagrams - Samsung SGH-X620 Service Manual

5. Block Diagrams

5-1. RF Solution Block Diagram
LMG003W-5106A
Imax = 10 mA
Freq (MHz)
EGSM_TX(880 ? 915)
EGSM_RX(925 ? 960)
DCS/PCS_TX(1710 - 1910) 1.5 dB
DCS_RX(1805 -1880)
PCS_RX(1930 -1990)
Atten 2xfo : 30dB,25dB(GSM,DCS/PCS)
Ripple in passband = 2.0dB max
Vc_EGSM Vc_DCS
EGSM_TX_MODE_SW
Inverter
circuits
DCS/PCS_TX_MODE_SW
PCS_TX_MODE_SW
VCC_RX_TX
Micro Devices Quadband PAM
GSM: Pout = 35.0 dBm Eff=60%
DCS: Pout= 33.0 dBm Eff = 55%
NTK FEM
(5.4*4.0*1.7mm)
Insertion Loss
1.28 dB
4.0 dB
4.1 dB
4.1 dB
3xfo : 25dB,25dB(GSM,DCS/PCS)
Vc_PCS
(2.5~3.0V)
Discrete
3 rd Order
Loop Filter
fc = ? kHz
OFFSET Mixer input power
-16dBm max, -22dBm min
Vcc_Tx_BURST
~
~
GSM S/W
DCS S/W
삼성전기 TX VCO
GSM
VOG1810F27KRA (5.7X5.0X1.5)
GSM = 880 ~ 915MHz
(Vt=0.5V ~ 3.0V )
kV = 55+-11 MHz/V Typ
DCS = 1710 ~ 1785MHz
VAPC
(Vt=0.5V ~ 3.0V )
DCS/PCS
kV = 115+-23 MHz/V Typ
Pout= 6.5+-3 dBm typ.,Ic <= 30mA
VBAT Harmonics <= -10dBc
RF3146 (7 X 7)
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Vc_PCS
Vc_PCS
QUAD
Vc_PCS
VREG DIV
Vcc_RF_LO
Vcc_RF_VCO
~
FracN
DIV
GSM/DCS/PCS
PFD
CP
FESW1
FESW2
DIV
QUAD
f
TXIF
60/114MHz
CP
PFD
Philips Transceiver
UAA3536
VCC_SYN (2.7V , 100mA )
RF1_VDD
VCC_RX_TX (2.7V ,100mA )
RF2_VDD
VCC_RF_VCO (2.7V , 100mA ) PCF50601
RF1_VDDS
VCC_TX_BURST (2.7V , 100mA )
RF2_VDDS
VCC_CP (4.0V , 25mA )
HVS
VDD3 (1.35V min 3.45V max , 100mA )
VDD4 (1.35V min 3.45V max , 150mA )
5-1
Pins IA,IB,QA and QB
V I : 1.25V
Q
V : 0.5V p
mod
p
+ I OUT
-
I OUT
100 kHz+fmod
+
Q OUT
-
Q OUT
Vcc_SYN
VREG
Vcc_REF(2.4V typ.)
f =26MHz
compRF
REFIN
26MHz
I+
1:1/
2
fmod
I-
3W
DATA
BUS
CLK
CTL
Q+
REG EN
Q-
RXON
PWR
TXON
EN
SYNON
FESWON(N,A)
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 )
ty . , 1.15V mi , 1.35V
max
p n
VC-TCXO