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EVM Group Presentation

EVM Group Presentation. Functionality & Performance of TI TRF6900 Nov 2 nd 2000. Individual Contributions. 1. Imran Bashir Evaluation of TRF6900 operation Calculation of various parameters Documentation Write-up of preliminary report Initial Block Diagram of System

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EVM Group Presentation

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  1. EVM Group Presentation Functionality & Performance of TI TRF6900 Nov 2nd 2000

  2. Individual Contributions • 1. Imran Bashir • Evaluation of TRF6900 operation • Calculation of various parameters • Documentation • Write-up of preliminary report • Initial Block Diagram of System • Schedule of Tasks/Timeframe • Research on TRF6900 EVM Board • Block Diagram of TRF6900 • Compiling specification of TRF6900 EVM • Assistance in TRF6900 EVM Test in Lab TI and Wireless Group 1 INTERNAL USE ONLY

  3. Individual Contributions 2. Jason Benavidez • Research on Frequency Hopping • Research on TRF6900 EVM Board • Proposal and research on Intersil Prism I, 2.5 GHz • Documentation • Assistance in TRF6900 EVM Test in Lab • Initial Block Diagram of System TI and Wireless Group 1 INTERNAL USE ONLY

  4. Individual Contributions 3. Wendy Johnston • Research on TRF6900 EVM Board • Research on Frequency Hopping • Documentation • Assistance in TRF6900 EVM Test in Lab • Initial Block Diagram of System TI and Wireless Group 1 INTERNAL USE ONLY

  5. Individual Contributions 4. Jeffery Allen • Proposal and Research on Intersil Prism I, 2.5 Ghz • Assistance in TRF6900 EVM Test in Lab • Initial Block Diagram of System • Research on TRF6900 EVM Board • Documentation TI and Wireless Group 1 INTERNAL USE ONLY

  6. Individual Contributions 5. Asad Khan • Proposal of TRF6900 EVM • Liaison Between Wireless Group 1 and TI • Provided Technical Support for TRF6900 from TI • Solicitation for Donation of TRF6900 EVM • Obtained Reference Documents for TRF6900 • Research on TRF6900 EVM Board • Assistance in TRF6900 EVM Test in Lab TI and Wireless Group 1 INTERNAL USE ONLY

  7. Individual Contributions 6. Fakri Sadeh • Research on Frequency Hopping • Assistance in TRF6900 EVM Test in Lab • Research on TRF6900 EVM Board • Documentation • Initial Block Diagram of System TI and Wireless Group 1 INTERNAL USE ONLY

  8. Time Frame TI and Wireless Group 1 INTERNAL USE ONLY

  9. SpecificationsTRF6900 TI and Wireless Group 1 INTERNAL USE ONLY

  10. EVM BOARDS EVM With Microprocessor EVM Without Microprocessor TI and Wireless Group 1 INTERNAL USE ONLY

  11. Receiver Circuit of TRF6900 TI and Wireless Group 1 INTERNAL USE ONLY

  12. Antenna IF Amplifier (1) RF Amplifier Pre-Select Filter LNA Impedance Matching BPF (1) BPF (1) Carrier RSSI (OOK/ASK) LPF Amplifier/ Post Detection Amplifier IF Amplifier (2) Data Slicer Data Switch FM / FSK Demodulator RX_DATA Tank Circuit Capacitor for VREF External Circuit for LPF RECEIVER TI and Wireless Group 1 INTERNAL USE ONLY

  13. Pre-Select Filter • High Pass Filter • Noise Suppression • Increases Performance of LNA • Prevents Addition of Spurious Components TI and Wireless Group 1 INTERNAL USE ONLY

  14. Pre-Select FilterFrequency Response TI and Wireless Group 1 INTERNAL USE ONLY

  15. Low Noise Amplifier (LNA) • Matches Upto 50 of Antenna Impedance TI and Wireless Group 1 INTERNAL USE ONLY

  16. RF Amplifier / Mixer • Compensates for Attenuation of the RF Signal • Carrier Frequency is Provided from VCO • Converts RF Signal to IF Signal TI and Wireless Group 1 INTERNAL USE ONLY

  17. FM/FSK Demodulator • Detaches Message from IF Signal • External Resonant Tank Circuit Adjusted by L7 • Consists of • Phase Shifting Circuit (by 90º) • Mixer • Low Pass Filter TI and Wireless Group 1 INTERNAL USE ONLY

  18. FM/FSK Demodulator Block Diagram Tank Circuit TI and Wireless Group 1 INTERNAL USE ONLY

  19. FM/FSK DemodulatorPhase Shift TI and Wireless Group 1 INTERNAL USE ONLY

  20. Low Pass Filter & Amplifier • Current-to Voltage Amplifier • 2nd Order Low Pass Active Filter • Bandwidth depends on Noise & Signal Bandwidth • Calculation of Parameters from MathCad • 45 kHz Cut-Off Frequency • Quality Factor 0.45 • Damping Factor 1.11 TI and Wireless Group 1 INTERNAL USE ONLY

  21. Low Pass Filter & AmplifierSchematics TI and Wireless Group 1 INTERNAL USE ONLY

  22. Low Pass Filter & AmplifierFrequency Response TI and Wireless Group 1 INTERNAL USE ONLY

  23. Data Slicer • Convert Analog Signal into Binary Data • Learning Mode • Auto zero Loop Activation • Voltage Stored in C20 to Set 0 Reference • Distinguish B/w 0 & 1 • Set Offsets of Data Slicer • Hold Mode • Non DC-Data Input TI and Wireless Group 1 INTERNAL USE ONLY

  24. Transmitter Circuit of TRF6900 TI and Wireless Group 1 INTERNAL USE ONLY

  25. LOCKDET Data Serial Interface Direct Digital Synthesizer (DDS) 2nd Order Loop Filter PLL VCO Tank Circuit Clock Strobe STDBY Mode VCO Crystal Oscillator TX_DATA Antenna Power Amplifier Amplifier Amplifier Filter / Impedance Matching TRANSMITTER TI and Wireless Group 1 INTERNAL USE ONLY

  26. CLOCK Serial Interface Logic DATA 22 Bit - Shift Register A - Latch 3 Bit Adder Address Decoder B - Latch C - Latch D - Latch Serial InterfaceBlock Diagram STROBE TI and Wireless Group 1 INTERNAL USE ONLY

  27. 24-Bit Register Sine Look-up Table 11-Bit DAC Reference Frequency, fref Sine Sharper DDS Frequency Register MODE (Pin #17) DDS Mode 0 TX Frequency LPF Mode (0/1) Select A-Word Modulation Control Logic DDS Mode 1 RX Frequency B-Word fDDS to PLL C-Word / MM Bit D-Word / DEV Bits (FSK Deviation) FSK Frequency Deviation TX_DATA (Pin # 19) Direct Digital Synthesizer TI and Wireless Group 1 INTERNAL USE ONLY

  28. Direct Digital Synthesizer TI and Wireless Group 1 INTERNAL USE ONLY

  29. Crystal Oscillator • Generates fref for DDS • Used in TX/ RX • Uses Quartz Crystal in Parallel Resonant Mode • 360 Degrees of Phase Shift • 15-26 MHz TI and Wireless Group 1 INTERNAL USE ONLY

  30. IPD_1 3.54 MHz PD fDDS External Loop Filter VCO DDS fout 928 MHz FD IPD_0 fref N-Divider 256 / 512 Phase-Lock Loop (PLL) TI and Wireless Group 1 INTERNAL USE ONLY

  31. Phase-Lock Loop (PLL)Loop Filter Characteristics (PLL Locked) TI and Wireless Group 1 INTERNAL USE ONLY

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