Rfsys Of Mt653 (U101) - LG -A290 Service Manual

3.5 RFSYS of MT6253 (U101)
3.5.1 GENERAL DESCRIPTION
RFSYS built in MT653 SOC is a highly integrated RF transceiver for multi-band GMS and GPRS cellular systems. The
features are listed as following.
 Receiver
- Direct conversion architecture
- Quad band differential input LNAs
- Quadrature RF mixers
- Fully integrated channel filter with f
- 95 dB gain with 60 dB gain control range
LGE Internal Use Only
Figure. 3.5.1 Block DIAGRAM of RFSYS
=150kHz
3dB
- 8 -
3. TECHNICAL BRIEF
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