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3. Technical Brief
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
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.
Figure 3-7-5. SKY77174 Functional Block Diagram
Figure 3-7-6. WCDMA PAM schematic
R112
NA
NA
R111
R110
0
NA
C114
9
11
PGND
RF_IN
4
8
RF_OUT
VBIAS
5
1
VCC1
VCC2
10
VCONTROL
3
U100
SKY77174
2
ENABLE
6
GND1
GND2
7
GND3
CES201G95DCB000
IS100
GND1 GND2
GND3 GND4
IN
OUT
3
C_OUT
GND1
2
GND2
5
1
IN
6
M_OUT
TERMINATE
4
U102 LDC181G9519B-327
C111
22p
C108
10p
47
R115
VBAT
VCC_PA
R105
0
0
GND101
GND100
R106
1.5nH
R109
10nH
1p
R108
0.01u
C107
1000p
C106
C104
1000p
WPA0_EN
WPA_BIAS
WTXMOD_BAND_I
WPOW_SENSE
WTX_BAND_I
Содержание KU580
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