DPA-2FL User Manual
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version 1.1
page 6
3. DPA-2FL Differential Amplifier / Filter Module
3.1. DPA-2FL
Components
The following items are shipped with the DPA-2FS system:
Amplifier / Filter module for the EPMS-07 system
User manual
3.2. System
Description
The DPA-2FL differential amplifier/filter is a plug-in unit for the npi EPMS-07 modular
system. The DPA-2FL is designed to amplify and filter very small bio-electrical signals. The
input voltage range is ±12 V, the inputs are protected up to 15 V. All inputs and the output are
BNC connectors.
The input impedance is 1 M
. Using the differential input configuration common mode
signals and noise are removed allowing recordings of signals with very small amplitudes. An
optional NOTCH filter removes 50 Hz / 60 Hz noise.
DC offsets can be compensated either by the using the OFFSET control or the HIGH PASS
filter.
The GAIN range is x10 to x10000 and the output signal is passed through the HIGH PASS,
LOW PASS and NOTCH filter.
Important:
To avoid noise interference the respective toggle switch should be in the zero
position if one of the inputs is not used.
3.3.
Signal Flow Diagram
The signal is passed through the DPA-2FL as shown below.
