MODEL 2283FT/2283FTi
FETRODE™ AMPLIFIER
UFI
545 Main Street, Suite C-2
Morro Bay, CA 93442
2
Introduction to Fetrode
™
artifact reduction
High impedance at the skin-electrode contact correlates
directly with the amplitude of the noise artifacts that can
plague bio-electric recordings. Historically, there have been
only two ways to reduce such noise: 1) use the very best
Ag/AgCl electrodes with a liquid-junction interface; and 2)
abrade the skin to reduce the skin/electrode contact
impedance. With the prevalence of HIV and hepatitis
viruses, breaking the skin barrier is no longer advisable.
Fetrodes™ eliminate the requirement to abrade the skin.
The Fetrode™ is a unique, temperature-compensated
amplifier with an extremely high input impedance and a
very low output impedance. The circuitry is built with state-
of-the-art surface mount technology into a miniature
enclosure that can be snapped onto any high-quality
electrode. This innovation places signal buffering directly on
the active electrode site. In so doing, the Fetrode™ virtually
eliminates artifacts due to electrostatic potentials and cable
noise, even with high electrode contact impedances.
The Model 2283FT is a stand-alone Fetrode™ bioamplifier
that meets many physiological research needs. Adjustable
gain and frequency response suit it to a wide variety of
input signals and downstream instruments. The Model
2283FTi Fetrode™ amplifier is just the same as the Model
2283FT, except that it incorporates subject isolation using
an off-the-shelf signal isolator.
