Service Manuals, User Guides, Schematic Diagrams or docs for : motorola Mobile Phone W220_sm W220_Circuit_description

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725 Edge
 W220 GSM/GPRS Level 3 Circuit Descriptions




                                                W220 GSM/GPRS




                                                        Level 3
                                                  Circuit Description
                                                      2006/03/27
                                                         V1.0


                          Motorola Proprietary Information/
725 Edge
 W220 GSM/GPRS Level 3 Circuit Descriptions

Index
1     Receive ................................................................................................................................. 4

    1.1      Band selection............................................................................................................... 4
    1.2      Frontend........................................................................................................................ 6
    1.3      Demodulation................................................................................................................ 6
    1.4      Audio............................................................................................................................. 7
    1.5      26MHz System Clock .................................................................................................. 10

2     TRANSMIT....................................................................................................................... 10

    2.1      Audio........................................................................................................................... 10
    2.2      Modulation.................................................................................................................. 12
    2.3      TX VCO....................................................................................................................... 13
    2.4      TX PA.......................................................................................................................... 14
    2.5      TX PA Power Control ................................................................................................. 14

3     Baseband Processsor ........................................................................................................ 16

    3.1      Main Baseband Digital Processor - U201 (CalypsoLite) .......................................... 16
    3.2      Baseband Analogue Coprocessor 

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