연세대 전기전자공학부 20-1학기 기초아날로그실험 6주차 예비레포트
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연세대 전기전자공학부 20-1학기 기초아날로그실험 6주차 예비레포트입니다.
이 보고서 성적은 만점(20/20)이며, 최종 성적은 A+를 받았습니다.
목차
Ⅰ. Chapter 12. ECG readout
1.Theory
1-1ECG (Electrocardiogram)
1-2ECG measurement method
1-3Instrumentation Amplifier (IA)
1-4Notch Filter
1-5Low-pass Filter
1-6High-pass Filter
1-7RLC circuit
2.PSPICE simulation
2-1 Experiment 1: Instrumentation amplifier
2-2 Experiment 2: Notch Filter
2-3 Experiment 3: Low-pass Filter
2-4 Experiment 4: High-pass Filter
본문내용
In this chapter, the goal is to design ECG readout circuit based on what we learned earlier using PSPICE simulation.
1. Theory
1-1 ECG (Electrocardiogram)
Electrocardiogram (ECG) is a record of the heart’s electrical activity of the myocardium of the heart on the body surface during one cardiac cycle. By evaluating the electrical activity of the heart and estimate the mechanical activity, it is useful for diagnosing signs of heart disease.
The ECG waveforms features a repetitive sequence of P wave, QRS complex, T wave and U wave, which represents the rhythmic depolarization and repolarization of the myocardium.
A schematic diagram of normal sinus rhythm for a human heart as seen on ECG is shown in [Figure 1-1] below.
[Figure 1-1] Sinus rhythm
P wave represents depolarization of atrial muscles. It is and earliest characteristic waveform on the ECG. Electrical excitement occurs during isotropy and transmits to the entire atrium, constricting the atrium muscles.
The time interval of P wave is 0.06 ~ 0.11 seconds, and the amplitude is less than 0.25 mV.
QRS complex is caused by the ventricular depolarization and represents the atrium repolarization. Electrical signals are transmitted very quickly throughout the ventricles, depolarizing ventricular muscles almost simultaneously, resulting in relatively large and sharp signals.
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