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Revision 1.00 / LB-1070 – NeuroPort Biopotential Signal Processing System IFU
© 2021 Blackrock Microsystems, LLC
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The Amplifier case is not connected to the earth ground. The Amplifier ground is isolated
and floating. There are ESD shunt circuits that will conduct differences of 1000 V or
more.
The Amplifier has four 34-pin banks. Each bank consists of 32 channels, a bank
reference pin, and a ground pin. The electrodes within each bank are differentially
amplified with respect to the reference input of the same bank. If channels on all banks
are to be electrically measured with respect to a common reference, this reference
needs to be connected to the reference input on every bank.
Additionally, four 6-pin APS banks provide power (±5V) to the headstage and can deliver
130 mA of combined current from the Amplifier. The ground pins on every bank are tied
together. For best results, the Amplifier should be the central grounding point for
electrical ground connections to the patient.
Amplifier Power Supply (APS)
The APS consists of five analog and digital supply channels with monitoring,
sequencing, and emergency shutdown controls.
Figure 6–Amplifier Input Schematic
Figure 7–Amplifier Power Supply