Open Access Open Access  Restricted Access Subscription or Fee Access

Design and Implementation of a Single-Channel ECG Amplifier with DSP Processor

E N Ganesh

Abstract


An electrocardiogram (ECG) signal is measured by ECG amplifier, which is a bioelectric amplifier that usually has gain of 1000. A standard ECG amplifier consists of an instrumentation amplifier (IA) followed by an isolation amplifier (iso-amp), then by bandpass filter (BPF), and right leg (RL) drive amplifier. This paper discusses design and implementation of a single-channel ECG circuit with bandwidth of 0.05–40 Hz for patient monitoring purposes. The component specifications were chosen such that circuit currents and voltages satisfy standards of Association for the Advancement of Medical Instrumentation (AAMI). Tests were performed, and acquired raw ECG data were verified to be acceptable. A digital zero phase bandpass filter (ZPBPF), combination of low-pass and high-pass filter, which was implemented in Matlab was used to further process rest ECG signal.

Full Text:

PDF

References


J.D. Bronzino. The Biomedical Engineering Handbook. CRC Press, Inc.; 1995.

Provaznik. Adaptive systems in ECG processing, PhD Dissertation. Technical University of Brno, Czechoslovakia, 1995.

W.J. Tompkins. Biomedical Digital Signal Processing. Prentice Hall, Inc.; 1993.

H. Hosseini, H. Nazeran, K.J. Reynolds. ECG noise cancellation using digital filters, In: 2nd International Conference on Bioelectromagnetism. Melbourne, Australia, 1998, 151–2p.

J.J. Carr, J.M. Brown. Introduction to Biomedical Equipment Technology. 3rd Edn., Prentice Hall, Inc., 1998.

A.C. Metting VanRijn, A. Peper, C.A. Grimbergen. The Isolation Mode Rejection Ratio in Bioelectric Amplifiers. Academic Medical Center, Medical Physics Department Netherlands, December 18, 2001.

S.R. Seydnejad, R.L. Kitney. Real-time heart rate variability extraction using the kaiser window, IEEE Trans Biomed Eng. 1997; 44(10): 990–1005p.

N.A. Blackburn. Enhancing ECG quality: update on site selection, skin preparation, and electrode placement, Conmed Corp. 2000; 1–8p.


Refbacks

  • There are currently no refbacks.