CXA3329ER 데이터 시트보기 (PDF) - Sony Semiconductor
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CXA3329ER Datasheet PDF : 14 Pages
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CXA3329ER
Description of Operation
1. Outline of operation
This IC performs the signal processing between the analog transmit baseband processor block and the analog
transmit RF processor block of the cellular phone. The figure below shows the general circuit block diagram for
the portable cellular phones using this IC. The input for this IC is connected to the baseband signal processor
block; the output is connected to the analog RF processor block.
CXA3328TN
RF receive/
transmit processor
Baseband signal
processor
CXA3329ER
2. IC Internal Signal Flow
Two baseband-processed signals I, Q and the local signal are input to this IC as shown in the figure below.
The local signal is 1/2-frequency divided, and that signal becomes the quadrature I/Q local signal. The
baseband I/Q signals are input to the quadrature modulatar, and baseband processing to IF upconversion is
performed with the quadrature local signals. The signal is input to the gain control amplifier, and output after
the gain controlled to the necessary level.
I/IX
Q/QX
Local
–90˚
0˚
1/2 div
(1/4 div)
OUT/OUTX
– 10 –
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