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Table of Contents:

1
2
REQUIRED EQUIPMENT FOR LEVEL 2,5E ......................................................5
3
4
RADIO PART....................................................................................................6
4.1
Power Supply RF-Part ....................................................................................7
4.2
Frequency generation.....................................................................................9
4.2.1
Synthesizer: The discrete VCXO (26MHz)........................................................................... 9
4.2.2
Synthesizer: LO1................................................................................................................ 11
4.2.3
Synthesizer: LO2................................................................................................................ 13
4.2.4
Synthesizer: PLL ................................................................................................................ 14
4.3
Antenna switch (electrical/mechanical) ......................................................15
4.4
Receivers .......................................................................................................17
4.4.1
Receiver: GSM900/1800 -Filter to Demodulator ............................................................... 17
4.4.2
IC Overview........................................................................................................................ 19
4.5
Transmitter ....................................................................................................20
4.5.1
Transmitter: Modulator and Up-conversion Loop............................................................... 20
4.5.2
Transmitter: Power Amplifier.............................................................................................. 21
5
POWER SUPPLY ..............................................................................................22
5.1
Overview and Voltages.................................................................................22
5.2
Power Supply ASIC.......................................................................................23
5.3
Battery and Charging....................................................................................26
5.3.1
Battery................................................................................................................................ 26
5.3.2
Charging Concept .............................................................................................................. 26
6
LOGIC PART .....................................................................................................28
6.1
Overview Logic/control ...............................................................................28
6.2
EGOLD (PMB6850) V2.x ...............................................................................30
6.3
EGAIM inside the EGOLD+...........................................................................31
6.3.1
Tasks of the EGAIM inside the EGOLD+........................................................................... 32
6.4
Real Time Clock (integrated in the EGOLD+) .............................................35
SRAM .............................................................................................................36
6.5
V1.0
C45, M50 AND MT50
Page 2 of 46
Company Confidential © Copyright Siemens AG
C45, M50 + MT50 .........4
ICM MP CCQ ST
05/02

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