Transmitter Part - LG KE590 Service Manual

3.2.2 Transmitter part

The B6PLD transmitter is capable of both GMSK and 8-PSK modulation, to support for conventional
GSM and EDGE. B6PLD integrates all loop filters to configure both PM loop and AM loop. See block
diagram below.
3.2.2.1 Polar Loop Structure
Three main functions are identified in the transmitter architecture; I/Q vector modulation at IF
frequency, amplitude and phase loop at IF/RF frequencies and power amplification.
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Fig. Simplified Block diagram for Tx part
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3. Circuit Description
LGE Internal Use Only