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DESCRIPTION
Prepared (also subject responsible if other) No.
SEM/GUR/BRR Pontus Nelderup 1/1551 - ROA 128 0351/2
Approved Checked Date Rev Reference
SEM/GUR/BRRC Mikael Nilsson 2003-02-28 B
Technical Description: T610 Radio on the Tranceiver
Board
Contents:
1 GENERAL...............................................................................................................................................................................................2
1.1 CROSS REFERENCES ................................................................................................................................................................ 2
1.1.1 Names..........................................................................................................................................................................................2
1.1.2 Abbreviations.............................................................................................................................................................................3
2 OVERVIEW ...........................................................................................................................................................................................4
2.1 THE TX PATH .............................................................................................................................................................................. 4
2.2 THE RX PATH .............................................................................................................................................................................. 5
3 FREQUENCY PLAN ...........................................................................................................................................................................6
4 THE RADIO BLOCKS ........................................................................................................................................................................7
4.1 THE ANTENNA SWITCH................................................................................................................................................................... 7
4.2 THE RECEIVER................................................................................................................................................................................ 8
4.2.1 RF filter and balun....................................................................................................................................................................8
4.2.2 Receiver front-end.....................................................................................................................................................................8
4.2.3 VCO .............................................................................................................................................................................................9
4.2.4 Sigma delta A/D Converter ...................................................................................................................................................10
4.2.5 Digital filter..............................................................................................................................................................................10
4.3 THE TRANSMITTER....................................................................................................................................................................... 11
4.3.1 Frequency synthesis and modulation...................................................................................................................................11
4.3.2 Direct modulation and frequency synthesis........................................................................................................................12
4.3.3 Phase detector.........................................................................................................................................................................12
4.3.4 Prescaler...................................................................................................................................................................................12
4.3.5 Charge pump and pulse skip detector.................................................................................................................................13
4.3.6 Loop filter.................................................................................................................................................................................13
4.4 POWER AMPLIFIER & POWER CONTROL BLOCK:...................................................................................................................... 14
4.5 THE VOLTAGE CONTROLLED X-TAL OSCILLATOR (VCXO): ................................................................................................ 15
4.6 POWER M ANAGEMENT ................................................................................................................................................................ 15
4.7 BLUETOOTH................................................................................................................................................................................... 15
5 PRINTED CIRCUIT BOARD .........................................................................................................................................................16
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DESCRIPTION
Prepared (also subject responsible if other) No.
SEM/GUR/BRR Pontus Nelderup 1/1551 - ROA 128 0351/2
Approved Checked Date Rev Reference
SEM/GUR/BRRC Mikael Nilsson 2003-02-28 B
1 GENERAL
This document describes radio solution, which is part of the transceiver board
mounted in the GSM pocket phones.
The other part of the transceiver board that carries the base band part is
described in the corresponding document 2/1551-ROA 128 0351/2.
The primary purpose of the radio part is to transfer the information to and from
the base stations without distortion, and to handle the large dynamic range of
the signals that occur during normal use.