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3. Technical Brief
A. Power Amplifier
The Power Amplifier (N401) 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 V
and V
respectively from the digital baseband controller ASIC(Marita).
apc
D C S/PCS Pin
EG SM Pin
Figure 3-7-6. Block diagram of the Power Amplifier with Two Parallel chains
Vband
G N D
G N D
G N D
100pF
Vcc
Vapc
G N D
10pF
33pF
100pF
Vcc
G ND
- 84 -
G N D
D C S/PC S Pout
G N D
EG SM Pout
G N D
band
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