Download JUL 182005

[14] The current AutoBench implementation assumes the two resistors are 100
to a high
degree of accuracy, which is not necessarily true.
6.2
Result Averaging
The accuracy of the parameter test results could be further improved by repeating
each parameter test and averaging the values. The averaging of multiple readings is
generally a good way to minimize the effects of sporadic environmental noise that has a
good chance of corrupting a single reading.
6.3
Optimization of Delays
Time delays are used in many of the software subVIs written for the system, to
allow for signals to attain steady states before they are measured. The time delays are
used to avoid measuring unwanted transient effects, since we are interested in the direct
current parameters that describe an instrumentation amplifier in steady state operation.
Generally, longer time delays are used in the subVIs than necessary for the sake of
caution. The longer delays increase the execution time for performing the parameter tests.
Optimizing the delays and removing the unnecessary ones could speed up the time for
testing a device.
6.4
Correlation to Manual Bench Readings
The AutoBench system's accuracy could be better described by correlating results
with readings obtained by manual bench testing of devices. This is however a time
consuming process and the improvement in the accuracy specification is not necessarily
assured.
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