BE401/BE909 Biomedical Electronics Assignment Brief | University of Strathclyde

Introduction 

This assignment is designed to assess your understanding of fundamental concepts in circuit analysis. You will apply filter design principles to biomedical signals, analyse DC circuits using Kirchhoff's laws, and work with frequency domain analysis for AC circuits.

The assignment consists of three parts of increasing difficulty.

• Part 1 covers basic concepts and techniques
• Part 2 requires deeper analysis and application of principles
• Part 3 challenges you to integrate multiple concepts for complex problem-solving. 

All solutions must be typed. Handwritten submissions will receive a mark of 0. All work must be clearly presented with appropriate diagrams, equations, and explanations of your approach. Remember to include units in your calculations and final answers.

The use of AI tools to solve this assignment is strictly prohibited. If AI usage is detected, your assignment will receive a mark of 0. This assignment must represent your own individual work. Copying from others or collaborative group solutions will be considered plagiarism and will be referred to the department for academic misconduct proceedings.

This assignment contributes 30% toward your final course grade.

• Part 1 (Easy):  (40% of assignment)
• Part 2 (Medium):  (33% of assignment)
• Part 3 (Hard): (27% of assignment)

Part 1

Solve the following circuit and find the value for Vout.   
Marking criteria:

• Write the KVL and KCL equations 
•  Solve the equations and find the correct answer 

Part 2

For the following circuit, the input signal is a sine wave with the frequency of 5 Hz. Use phasors to find the value of Vout.
Marking criteria:

• Write the KVL and KCL equations in the frequency domain
• Find the amplitude and phase shift for Vout when Vin = sin(5t) 

Part 3

We are recording EEG signal from a subject; the recording is contaminated with a noise with frequency of 200Hz. We know that the EEG signal has a bandwidth from 0.5Hz to 80Hz.

If we are interested to attenuate the 200 Hz noise by at least 10 dB, what type of filter do we need to use to achieve our goal?
Marking criteria:

• What type of filter (low pass/high pass/band pass/band-stop) must be used and draw the selected filter frequency response
• Calculate the cutoff frequency(s) of the selected filter 

We want to extract the beta wave from the EEG signal and other frequency bands should be attenuated. What type of filter should be used? (the beta wave is a filtered EEG signal between 13 Hz-30Hz)
Marking criteria:

• Choose a filter (low pass/high pass/band pass/band-stop) and draw the selected filter frequency response
• Calculate the cutoff frequency(s) of the selected filter