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3. TECHNICAL BRIEF
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Copyright © 2012 LG Electronics. Inc. All right reserved.
Only for training and service purposes
LGE Internal Use Only
LG530G
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3.3.4 Front-End Module (FEM)
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Low-loss SAW frontend module for mobile telephone system
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Covering GSM850, GSM900, GSM1800, GSM1900, 2 ports for WCDMA
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Integration of TX low pass filters, switches and decoder
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Integration of GSM 850, EGSM, DCS and PCS RX SAWs
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Balanced outputs of all RX ports, diplex for GSM850 / EGSM and DCN / PCS
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Integration of ESD protection circuit.
Figure 3.3.4.1 Block diagram of FEM
GSM850RX
GSM900RX
GSM1800/1900RX
GSM Low Tx
GSM High Tx
TRX1
TRX2
Vdd,Vc1...Vc3
ESD Protection
Circuit
3.3.4 Front-End Module (FEM)
Figure 3.3.4.1 Block diagram of FEM