Digital reproduction of biopotential waveforms for neurophysiological studies.
A simple biological signal generator capable of reproducing complex biopotential waveforms is described. It is constructed by a combination of digital and analog circuit components and can be used under different experimental conditions, such as in calibration of biomedical instrumentation systems, or simply as a function generator providing voltage outputs of various waveforms. The biopotential waveform to be generated is sampled at a high frequency and the samples are stored sequentially in a programmable read only memory (PROM). The samples are then fed in the same sequence to a digital-to-analog (D/A) converter and the resulting output is amplified and a DC offset is added. External controls are provided to adjust the DC offset, amplitude and repetition rate of the signal generated. The reproduced voltage signals are stable and superior in quality to those produced by conventional biological signal generators.
Duke Scholars
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Related Subject Headings
- Physiology
- Neurophysiology
- Motor Endplate
- Microcomputers
- Animals
- 1116 Medical Physiology
- 1106 Human Movement and Sports Sciences
- 0606 Physiology
Citation
Published In
DOI
ISSN
Publication Date
Volume
Issue
Start / End Page
Location
Related Subject Headings
- Physiology
- Neurophysiology
- Motor Endplate
- Microcomputers
- Animals
- 1116 Medical Physiology
- 1106 Human Movement and Sports Sciences
- 0606 Physiology