Electrical penetration graph system

摘要

An electrical penetration graph (EPG) system includes a monitoring device with a buffered and stabilized voltage source assembly and a buffered internal amplifier with switched gain control. The system also includes a head stage amplifier. During the EPG process, the voltage source assembly directs an electrical current through a feeding insect. As the current passes through the insect, the insect's feeding process modulates the current and creates voltage waveform data. A head stage amplifier with selectable input resistance receives and amplifies the voltage waveform data. The data is transmitted back to the monitoring device where it is manipulated and further amplified by the monitoring device internal amplifier assembly. The waveform data is then transmitted to a controller and ultimately to an output device where the data is displayed.