Service Manuals, User Guides, Schematic Diagrams or docs for : Sony Ericsson Mobile Phones Сотовый телефон Sony Ericsson K700 SONY ERICSSON K700 4

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                                                                                     Confidential                                                                    1(15)
                                                                                     DESCRIPTION
                                                                                     Document number                                                     Revision
                                                                                     1/1551-ROA 128 1044                                                 A
Prepared by                                                                          Date
LD/SEM/BGURBRR Peter Lorentzon                                                       2004-04-13
Contents responsible if other than preparer                                          Remarks
                                                                                     Reference
Approved by
SEM/BGURBRRC Mikael Nilsson




                                              Technical Description:

                                              RADIO CIRCUITS ON THE TRANSCEIVER BOARD




                                              CONTENTS

                                              1       GENERAL ............................................................................................. 2
                                              1.1     CROSS REFERENCES....................................................................... 2
                                              1.1.1   Names................................................................................................... 2
                                              1.1.2   Abbreviations ........................................................................................ 3
                                              2       CHANGES BETWEEN REVISIONS .................................................... 3
                                              3       OVERVIEW........................................................................................... 4
                                              3.1     THE TX PATH....................................................................................... 4
                                              3.2     THE RX PATH...................................................................................... 5
                                              4       Frequency plan ..................................................................................... 6
                                              5       The radio blocks: .................................................................................. 7
                                              5.1     The antenna switch............................................................................... 7
                                              5.2     The Receiver......................................................................................... 8
                                              5.2.1   RF filter and balun ................................................................................ 8
                                              5.2.2   Receiver front-end ................................................................................ 8
                                              5.2.3   VCO ...................................................................................................... 9
                                              5.2.4   Sigma delta A/D Converter................................................................. 10
                                              5.2.5   Digital filter .......................................................................................... 10
                                              5.3     The transmitter:................................................................................... 11
                                              5.3.1   Frequency synthesis and modulation................................................. 11
                                              5.3.2   Direct modulation and frequency synthesis ....................................... 12
                                              5.3.3   Phase detector.................................................................................... 12
                                              5.3.4   Prescaler............................................................................................. 12
                                              5.3.5   Charge pump and pulse skip detector ............................................... 13
                                              5.3.6   Loop filter ............................................................................................ 13
                                              5.4     Power amplifier & Power control block:.............................................. 14
                                              5.5     The Voltage Controlled X-tal Oscillator (VCXO): ............................... 15
                                              5.6     Power Management............................................................................ 15
                                              6       REFERENCES ................................................................................... 15




  Note: Any hard copy of this document is for reference only. Due to template and application dependencies the header and footer may fail to display correct data. It is
  the responsibility of the user to ensure that they have a correct and valid version. Any outdated hard copy is invalid and must be removed from possible use.
                                      Confidential                                            2(15)
                                      DESCRIPTION
                                      Document number                              Revision
                                      1/1551-ROA 128 1044                          A


1       GENERAL
        This document describes radio solution, which are part of the transceiver board
        mounted in the digital GSM pocket phones.

        This document is also valid for transceiver board ROA 128 1044 (K700i).

        The other part of the transceiver board that carries the base band part is described
        in the corresponding document 2/1551 

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