Analysis and Application of Analog Electronic Circuits to Biomedical Instrumentation, 2nd Edition

1 Sources and Properties of Biomedical Signals

1.1 INTRODUCTION

Before describing and analyzing the electronic circuits, amplifiers, and filters required to condition the signals found in clinical medicine, biomedical research, and physiology, it is appropriate to describe the sources and properties of these signals (i.e., their bandwidths, amplitude distributions, and noisiness). Broadly speaking, biomedical signals can be subdivided into two major classes: (1) Endogenous signals, which arise from natural physiological processes and which are measured within or on the surface of living creatures (examples include electrocardiogram (ECG), electroencephalogram ...