LG U8110 Service Manual page 80

3. TECHNICAL BRIEF
B. Power Amplifier
The Power Amplifier (N1300) is intended for use in EGSM and DCS/PCS mobile equipment. It is a
module with two parallel amplifier chains, with one chain for the EGSM transmitter section and one for
the DCS/PCS transmitter section. Each chain amplifies the RF signal from the respective transmitter to
the antenna. The power amplifier supports class 10.
Band selection and the output power level of the RF amplifier are controlled by discrete signals Vband
and Vapc respectively from the digital baseband controller ASIC.
Figure 3-8. Block diagram of the Power Amplifier with Two Parallel chains.
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