LG KE520 Service Manual page 20

3.2.4.2 Logic Table for Selection
Select Mode
GSM900_Rx
GSM1800_Rx
GSM1900_Rx
GSM900_Tx
GSM1800/1900_Tx
3.2.5 Power Amplifier Module
for Quad-band GSM/GPRS/EDGE
3.2.5.1 PAM Specification
-. Quad band GSM, GPRS & Polar Loop EDGE Amplifier
-. For 3.5V nominal operation
-. Built-in LDO circuit
-. GPRS Class 12 operation compatible
-. Integrated directional coupler
3.2.5.2 Circuit Diagram and peripheral components
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
Vc1
Low
Low
Low
High
Low
<Table 1.> Band SW Logic Table
RPF09036B
- 21 -
3. Circuit Description
Vc2
Low
Low
Low
Low
High
LGE Internal Use Only