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RF Transmitter For Biological Signals

Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck. 2. Project Proposal. To design an instrumentation amplifier with RF transmitter specifically for recording and transmitting biopotential signals RF Transmitter:Carrier Frequency: 433 MHzType: Frequency Modulation. Chia-Hsuan Tsai, Benjamin Sam

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RF Transmitter For Biological Signals

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    1. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 1 RF Transmitter For Biological Signals ECE 453 Final Project: Chia-Hsuan (Penny) Tsai, Benjamin Samuel Madoff, Idan Beck

    2. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 2 Project Proposal To design an instrumentation amplifier with RF transmitter specifically for recording and transmitting biopotential signals RF Transmitter: Carrier Frequency: 433 MHz Type: Frequency Modulation

    3. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 3 Types of Biopotential Signals EEG: electroencephalography EOG: electrooculography EMG: electromyography EKG/ECG: electrocardiography

    4. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 4 RF Transmitter Input signal from electrodes amplified by instrumentation amp Analog voltage value fed to the Voltage Controlled Oscillator which produces the waveform to be transmitted Waveform fed into a power amplifier to power the signal so that it can drive the antenna to transmit the signal

    5. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 5 Instrumentation Amplifier

    6. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 6 Single Op Amp Benchmarks

    7. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 7 Input Encryption for Transmission - Amplitude Modulation Involves superposition of two periodic functions Hard to maintain data integrity due to uncontrollable atmospheric variables. Frequency Modulation Involves converting an analog value to a frequency. Data integrity easier to maintain via clever circuit design for transmitter and receiver circuitry.

    8. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 8 Voltage to Frequency We used a Voltage Controlled Oscillator (VCO) An input voltage alters the reverse bias on a diode which acts as a tuning capacitor. This capacitor controls the oscillator’s resonant frequency and allows us to modulate the frequency through an input voltage.

    9. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 9 VCO Principles of Operation

    10. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 10 VCO Principles of Operation

    11. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 11 Our VCO Design

    12. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 12 Our VCO Design

    13. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 13 !Simulation Results!

    14. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 14 Class E Power Amplifier

    15. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 15 Concept of Class E PA

    16. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 16 After set the switch

    17. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 17 PA component parameters

    18. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 18 PA circuit

    19. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 19 Full Circuit Output

    20. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 20 Questions

    21. Chia-Hsuan Tsai, Benjamin Samuel Madoff, Idan Beck 21

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