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D. Power Amplifier Module
The SKY77174 Power Amplifier module is a fully matched 10-pad surface mount module developed
for Wideband Code Division Multiple Access (WCDMA) applications. This small and efficient power
amplifier packs full coverage of the 1920 - 1980 MHz bandwidth into a single compact package.
LGE Internal Use Only
Copyright © 2008 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Figure 3-7-5. SKY77174 Functional Block Diagram
DNI
C210
C212
0.5p
1000p
C204
1000p
C206
LDC181G9519B-327
C_OUT
3
GND1
2
5
GND2
IN
1
M_OUT
6
4
TERMINATE
22p
N201
C211
VCC_PA
C207
DNI
GND1 GND2
GND3 GND4
IN
OUT
IS201 CES201G95DCB000
56p
C208
SKY77174
U201
ENABLE
2
6
GND1
GND2
7
GND3
9
PGND
11
4
RF_IN
RF_OUT
8
5
VBIAS
1
VCC1
10
VCC2
3
VCONTROL
L203
10nH
VBAT
L201
1.5nH
10p
C205
C201
0.01u
R201
47
WTX_BAND_1_EN
WTXMOD_BAND_I
WTX_BAND_1
WPOW_SENSE
WPA_BIAS
Figure 3-7-6. WCDMA PAM schematic
Z3X-BOX.COM
Содержание KT520
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