Multichannel Systems STG1000 Manual - Manual (Page 70)

Stimulus Generator 1000 Series User Manual
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Fig. 9 STG output with programmed biphasic 50 mV and 5 μA pulses, duration 100 μs for each
phase.
The negative phase of the inverted voltage output (U, yellow) and the positive phase of the
current output (+I, cyan) are more delayed and significantly shorter than the other phases. The
delay of the current output of the 5 μA positive phase is so high that the electronics are not able
to generate any current output in the short duration of the pulse at all, that is, the actual current
output is zero.
Decreasing time lag with increasing pulse amplitude
The following figures illustrate that the behavior of the STG's electronics improves with increasing
amplitude. With amplitudes greater than 200 mV or 100 μA, the time lag between the Sync
Out as a reference point and the voltage/current outputs is short and stable (see data sheet).
The yellow traces show the inverted voltage (U) ouput; cyan traces are from the current output
(+I) with a load resistance of 10 k
Ω, and green traces show the TTL output from the Sync Out
that was used for triggering the oscilloscope
.