LG PRADA KE850 - Page 63

3. TECHNICAL BRIEF
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DCS
RF Transceiver
GSM850
PCS
EGSM
2.2p
NA
C446
11
XO XOX
12
18nH
L405
RX4X
23
TX1
36
37
TX2
VBIAS
34
VCO_RC
18
VDDBIAS2V8
31
VDDDIG1V5
8 5
VDDDIG2V8
VDDLNA1V5
21
39
VDDMIX2V8
19
VDDRX1V5
VDDRX2V8
2035
VDDTX1V5
VDDTX2V8
38 17
VDDVCO2V8
15
VDDXO2V8
32
FE1
33
FE2
FSYS1
14
FSYS2
10
9
FSYS3
13
GND1
26
GND2
GND3
40
41
GND4
RX1
29 30
RX1X
RX2
27 28
RX2X
24
RX3
RX3X
25 22
RX4
PMB6272
U404
1
A AX
2 3
B BX
4 7
CLK DA
6
EN
16
10p
C440
C425
0.1u
C467
100p
NA
VRF1V5
C423
VRF1V5
NA
C449
0R425
NA
L404
2.2u
C435
R436 100
VRF2V85
R412
0
R415 10
C431
NA
R432 0
R438 0
NA
VRF2V85
NA
C455C454
C442
4700p
0.1u
C424
R416
0
C463
NA
1
.
2p
R424 0
C427
NA
0.1u
C443
4
60
8
u
C445
NA
VRF2V85
R434 0
VRF2V85
2.2u
C434
NA
C462
0R422
NA
C459
VRF2V7
NA
0.1u
C426
100R437
0
R418
100p
C464
4.7u
C432
100R435
470pC433
1
.
5p
C456
47n
C444
100p
R414 820
1V5_Core
26MHz
X401
2
GND
3
OUT
VCC
4
VCONT
1
100p
C452
2.2p
100p
C465
R426
10
NA
C448
1
.
5p
R421 0
VRF2V7
NA
NA
C466
1.2p
5.6nH
L407
0R431
R419
0
R427
0
0R433
R417 1.8K
NA
C458
5.6nH
L406
IX
I
VC4
FSYS2
EN
CLK
QX
Q
VC2
VC3
DA
26M_BB
VC1
AFC
Figure 35 RF transceiver PMB7262 SMARTi-PM functional block diagram
Figure 36 RF transceiver PMB7262 SMARTi-PM schematic