An Inexpensive, Noise-Immune Amplifier Designed for Computer Monitoring of Ventilatory Movements of Fish and other Biological Events

Abstract

An inexpensive, noise-immune amplifier designed to interface ventilatory movements of fish and other biological events to mini- and micro-computers is presented. Total amplification of the signal is adjustable from 2.92 × 104 to 3.21 × 105. Although the cost of this amplifier is small, the main contribution lies in the realm of noise immunity, an essential quality for linking bioelectric signals of fish and other aquatic organisms to computers.