PDF

Keywords

nan

Abstract

ABSTRACT An Electro-Cardio-Graph (ECG) is a device that records the electrical activity of the heart. Skin electrodes placed at designated locations on the body collect ECG measurement information, and from these waveforms different information on heart condition can be derived. This paper discusses the design and implementation of a single-channel ECG (three-electrode) circuit with a bandwidth of (0.5-100) Hz for patient monitoring purposes. The front end of an ECG must be able to deal with weak signals ranging from few microvolts to few millivolts. An analogue ECG amplifier is designed and implemented using instrumentation amplifier (IA) followed by band pass filter (BPF), then by notch filter (NF) to minimize noise affecting the signal, and a right leg drive circuit (RLDC). . The ECG data is recorded and analyzed with greater flexibility using personal computer. The (ALS 4000) PC-sound card is used as a data acquisition device. The Matlab program (version 6.5) is employed to acquire data from sound card then digitally processing the signal in order to display the ECG signal on a PC monitor.
https://doi.org/10.33899/rengj.2005.45723
  PDF