LG lg530g Service Manual page 30

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