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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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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