Electrocardiogram & Photoplethysmogram: Circuits Design & Analysis

This lecture covers the design and analysis of circuits for electrocardiogram (ECG) and photoplethysmogram (PPG) measurements. It starts by explaining the human body's impedance and the principles of ECG and PPG. The instructor discusses the sources of interference in ECG recordings and the use of differential amplifiers to improve signal quality. The lecture also delves into the concept of common mode rejection and the design considerations for circuits with infinite input impedance. Additionally, it explores the measurement of heart activity using optical methods and the conversion of blood flow into electrical signals, including low pass filtering techniques.