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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

EVM Group Presentation

Functionality & Performance of

TI TRF6900

Nov 2nd 2000

individual contributions
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

individual contributions3
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

individual contributions4
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

individual contributions5
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

individual contributions6
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

individual contributions7
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

time frame
Time Frame

TI and Wireless Group 1 INTERNAL USE ONLY

specifications trf6900
SpecificationsTRF6900

TI and Wireless Group 1 INTERNAL USE ONLY

evm boards
EVM BOARDS

EVM With Microprocessor

EVM Without Microprocessor

TI and Wireless Group 1 INTERNAL USE ONLY

receiver circuit of trf6900
Receiver Circuit of TRF6900

TI and Wireless Group 1 INTERNAL USE ONLY

slide12

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

pre select filter
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

pre select filter frequency response
Pre-Select FilterFrequency Response

TI and Wireless Group 1 INTERNAL USE ONLY

low noise amplifier lna
Low Noise Amplifier (LNA)
  • Matches Upto 50 of Antenna Impedance

TI and Wireless Group 1 INTERNAL USE ONLY

rf amplifier mixer
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

fm fsk demodulator
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

fm fsk demodulator18
FM/FSK Demodulator

Block Diagram

Tank Circuit

TI and Wireless Group 1 INTERNAL USE ONLY

fm fsk demodulator phase shift
FM/FSK DemodulatorPhase Shift

TI and Wireless Group 1 INTERNAL USE ONLY

low pass filter amplifier
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

low pass filter amplifier schematics
Low Pass Filter & AmplifierSchematics

TI and Wireless Group 1 INTERNAL USE ONLY

low pass filter amplifier frequency response
Low Pass Filter & AmplifierFrequency Response

TI and Wireless Group 1 INTERNAL USE ONLY

data slicer
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

transmitter circuit of trf6900
Transmitter Circuit of TRF6900

TI and Wireless Group 1 INTERNAL USE ONLY

slide25

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

serial interface block diagram

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

direct digital synthesizer

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

direct digital synthesizer28
Direct Digital Synthesizer

TI and Wireless Group 1 INTERNAL USE ONLY

crystal oscillator
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

phase lock loop pll

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

phase lock loop pll loop filter characteristics pll locked
Phase-Lock Loop (PLL)Loop Filter Characteristics (PLL Locked)

TI and Wireless Group 1 INTERNAL USE ONLY