Neurotechnology Research Systems
© Plexon Inc
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The expected voltage rise over the 50 µs duration 100 µA first phase of the pulse is:
These calculated values are in agreement with the observations from the voltage monitor.
Note also that when the current stops flowing at the end of the first phase the voltage immediately
drops by the same amount that it jumped at the beginning of the pulse (V
ACCESS
). The current during
the interphase period is zero. With no current flowing into the electrode, there is no voltage drop
across the electrode access resistance. Therefore the voltage during the inter-phase period is the
same as V
CHARGE
. Since there is no current during the inter-phase period the voltage also remains
constant during this period.
50 µs
50 µs
25 µs
V
ACCESS
= 500 mV @ electrode
V
CHARGE
= 1.06 V @ electrode
