Ericsson TechDes free download

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Technical Description Ericsson Mobile Phone EF738 Technical Description 2 Technical Description Contents Overview __________________________________________ 7 Basic Building Blocks ______________________________________ 8 Transceiver Block Diagram _________________________________ 9 PCB ____________________________________________________ 10 Mechanical Design __________________________________11 Man Machine Interface (MMI)_______________________ 12 Keypad _________________________________________________ 12 Display _________________________________________________ 12 Acoustic Signals __________________________________________ 12 Top LED Indicator _______________________________________ 12 Radio Design ______________________________________ 13 General Overview ________________________________________ 13 Antenna Connector ___________________________________________ 13 Antenna Filters ______________________________________________ 13 Receiver Part________________________________________________ 14 Receiver Front End ________________________________________ 14 IF Part __________________________________________________ 14 Receiver Back-End ________________________________________ 15 Synthesizer _________________________________________________ 16 Programming _____________________________________________ 16 Power___________________________________________________ 16 Lock Detect ______________________________________________ 16 VCTCXO __________________________________________________ 17 Transmitter _________________________________________________ 18 TX Blocks _______________________________________________ 18 MALIN ____________________________________________________ 19 TX-IF VCO ______________________________________________ 19 TX Mixer ________________________________________________ 19 TX Modulation ___________________________________________ 19 TX-IF Frequency Control ___________________________________ 19 Programmable Prescaler ____________________________________ 19 Power and Charging Design _________________________ 20 Regulators ______________________________________________ 20 Reset ___________________________________________________ 21 On/Off Control __________________________________________ 21 Charging Circuitry _______________________________________ 21 Transient/ESD Protection__________________________________ 22 Off Current Draw ________________________________________ 22 User Interface _____________________________________ 23 Illumination _____________________________________________ 23 Buzzer ________________