EXT amplifiers from npi are designed for low noise recordings of extracellular electric signals. All amplifiers are designed as modular systems to enable customized signal processing configurations. Models include: analog displays for potential, variable gain up to 10k, offset and capacity compensation and tunable highpass/lowpass filters. Most systems are equipped with a small headstage with high impedance differential inputs to suppress noise and other distortions.
The EXT-10C has a differential input with high input resistance to avoid noise and the incoming signal can be compensated for offset and capacity of the microelectrode by the two potentiometers OFFSET and C-COMP. An analog balance monitor makes the control of offsets easy. The recorded signal can be obtained either AC with GAIN of 100, 1k or 10k or DC with GAIN of 10, 100 or 1k. An optional NOTCH filter eliminates 50/60 Hz noise. The system consists of a module for the EPMS-07 system and a small headstage.
The EXT-10C is designed to be used with the DPA-2F amplifier/filter module from npi which combines additional gain stages with high- and lowpass filters.
Headstage for npi´s extracellulary amplifier