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| Active2.5
AD-box (ActiveTwo with MK3 connectors) |
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Active2.5 AD-box forms an ultra compact, low power galvanically
isolated front-end (close to the subject) in which up to 256 sensor-signals
are digitized with 24 bit resolution. These sensors can be Active
electrodes as well as a range of additional active sensors measuring parameters
like respiration, temperature, force etc. Each AD-box channel consists
of a low noise DC coupled post-amplifier,
with a first order anti-aliasing filter, followed by a Delta-Sigma
modulator with an oversampling rate of 64, and decimation
filter with a steep fifth order cascaded integrator-comb (CIC) filter response and high resolution 24-bit output. The digital outputs
of all the AD converters (up to 256) are digitally
multiplexed and sent to the PC via a single optical fiber without
any compression or other form of data reduction. |
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Special
input stage matched with the output of the new 2-wire Active
electrodes. |
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Powersupply to active electrodes has auto-shutdown for optimal
safety. |
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ADC
per channel offers synchronized sampling, no skew, Zero-Reference principle. |
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24
bit sampling, 31nV digital
resolution with guaranteed no missing codes. |
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Sigma-Delta
converter technology for unsurpassed linearity and dynamic
range. |
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Configurable/upgradeable
number of channels: 8 up to 256 channels. |
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Up
to 16 kHz sample-rate per channel, user selectable (1.5MByte/sec total throughput). |
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Full
DC operation, with input range as large as found in AC
designs. |
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Battery
powersupply with fiber optic link offers optimal interference
rejection and subject safety. |
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Low
power design: 5 hour battery life for 256 channels, 1 week
for 8 channels. |
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