Title :
A Head-Mounted 24-Channel Evoked Potential Preamplifier Employing Low-Noise Operational Amplifiers
Author_Institution :
Department of Bioinformation Systems, California Institute of Technology
fDate :
5/1/1977 12:00:00 AM
Abstract :
A simple circuit employing operational amplifiers yields an inexpensive low-noise biological amplifier. Design parameters are discussed and performance measured. When twenty-four of these amplifiers were incorporated in a head-mounted evoked potential preamplifier, noise increased while common mode rejection and stability decreased. These effects are explained and successfully controlled by minimizing source resistance and adding a simple feedback circuit.
Keywords :
Circuit stability; Diodes; Humans; Low-noise amplifiers; Operational amplifiers; Preamplifiers; Signal generators; Temperature distribution; Temperature measurement; Voltage; Amplifiers; Brain; Electrophysiology; Evoked Potentials; Feedback; Humans;
Journal_Title :
Biomedical Engineering, IEEE Transactions on
DOI :
10.1109/TBME.1977.326229
