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A. Front End Part
SKY77513 TX-RX Front End Module (FEM) offers a complete transmit VCO-to-Antenna and Antenna-
to-receive SAW filter solution in a low profile (1.2 mm), compact form factor for handsets comprising
GSM850/900, DCS1800, and PCS1900 operation. The FEM also supports Class 12 General Packet
Radio Service (GPRS) multi-slot operation, Polar EDGE modulation, and provides single UMTS band
(band 1 or band 2) antenna switch-through via a dedicated UMTS port.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
10u
C103
0.01u
C102
0
C109
C107
0
22p
C105
GND101
GND8
GND9
22
7
GSM_IN
GSM_RX1
16
17
GSM_RX2
8
MODE
VAPC
6
5
VBATT
WCDMA
26
OUT101
51
52
GND38
GND39
53
GND4
12
54
GND40
GND41
55
56
GND42
GND43
57
58
GND44
59
GND45
60
GND46
GND47
61
62
GND48
13
GND5
GND6
18
GND7
19
20
36
37
GND23
GND24
38
39
GND25
GND26
40
GND27
41
42
GND28
GND29
43
11
GND3
44
GND30
GND31
45
46
GND32
47
GND33
48
GND34
GND35
49
50
GND36
GND37
DCS_RX2
ENABLE
1
GND1
9
23
GND10
24
GND11
25
GND12
27
GND13
28
GND14
GND15
29
30
GND16
31
GND17
GND18
32
GND19
33
GND2
10
34
GND20
35
GND21
GND22
U101
SKY77513
21
ANT
3
BS_1
BS_2
4
2
DCS_PCS_IN
DCS_RX1
14
15
10u
C104
L101
22nH
C116
DNI
R130
51
VBAT
0
C110
C648
DNI
0
C115
ANT101
22p
C101
22p
C112
C113
22p
ANT
G1
G2
RF
22p
KMS-512 SW101
C114
RX900
TX_EGSM
VAPC
WRF_BAND_1
ANTSW0
ANTSW2
ANTSW1
TX_DCSPCS
RX1800
RX1900
Figure 3-7-10. Front End part schematic
Figure 3-7-9. SKY77513 Functional Block Diagram
Z3X-BOX.COM
Содержание KT520
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