LG KE820 - Receiver Part

3. TECHNICAL BRIEF
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3.21. Receiver part
Figure 37 RF transceiver PMB7262 SMARTi-PM schematic
Figure 38 Receiver part block diagram
DCS1800 PCS1900GSM850 GSM900
NA
R420
C457
4.7u1u
C417
C445
L403
5.6nH
1.8p
2V85_RF
R421
NA
C418
0.1u
1.8p
C439
C434
C430
22p
NA
1V5_RF
1uF
C431
18nH
L404
1.8p
C441
0
1V5_CORE
R426
R427
0
C421
0.1u
R431
0
C442
1.8p
NA
C435
R418
10
C422
0.1u
L405
18nH
26MHz
X401
GND
2
3
OUT
VCC
4
VCONT
1
0.1u
C429
R425 620
0
R428
820
NA
R415
R414
C446
1.8p
2V7_VCXO
0
R430
R419
0
2V85_RF
1V5_RF
0.1u
C424
47n
C419
0.1u
R424
0
2V85_RF
C428
0
R449
R448
0
C433
NA
5.6nH
L402
R413
0
C416
0.1u
1.8p
C443
2V7_VCXO
C440
1.8p
100p
C426
0
R429
2V85_RF
C423 1000p
C427 1000p
0.1u
C425
0.1u
C420
10
0
R412
VDDXO2V8
15
XO
11 12
XOX
R423
RX4
22 23
RX4X
36
TX1
TX2
37
34
VBIAS
VCO_RC
18
31
VDDBIAS2V8
8
VDDDIG1V5 VDDDIG2V8
5
21
VDDLNA1V5
VDDMIX2V8
39
VDDRX1V5
19
20
VDDRX2V8VDDTX1V5
35
38
VDDTX2V8 VDDVCO2V8
17
16
EN
FE1
32
FE2
33
14
FSYS1
10
FSYS2 FSYS3
9
13
GND1
GND2
26
40
GND3
GND4
41
29
RX1
RX1X
30 27
RX2
RX2X
28
RX3
24 25
RX3X
U402
PMB6272
A
1 2
AX B
3 4
BX CLK
7 6
DA
NA
C455
C432
NA
C444
1.8p
R416
NA
I
IX
Q
QX
AFC
RF_DA
RF_EN
RF_CLK
26MHZ_MCLK
BT_CLK
HBAND_PAM_IN
LBAND_PAM_IN