1 An Electrocardiogram Simulator and Amplifier

The electrocardiogram, or recording of the heart’s potential on the body’s surface, is perhaps the most important diagnostic tool in clinical cardiology. This report describes a simple ECG simulator, as well as a full ECG amplifier, filter, and recorder. The implementation uses an active-ground, pre-amplifiers, 2000X amplification in two stages, and a filter designed to eliminate 60 Hz interference from power-lines. The system includes an easy-to-use PC interface for physicians. Sample waveforms from different stages of the system demonstrate its operation. 1