Operator Menu Location: Signal Comparators
Operator Bitmap:
Functional Description:
The Thresholding operator compares an analog input signal to high and low threshold levels. The operator's digital output is set HIGH if the input signal is greater than the upper limit; it is set LOW if the input signal is less than the lower limit; and it remains unchanged while the input signal is between the threshold levels. For the output to change from LOW to HIGH, the input must exceed the threshold level for a user-specified length of time-the rising dead-time. Likewise, for the output to switch from HIGH to LOW, the input signal must be less than the threshold level for a user-specified length of time-the falling dead-time. That is, the output y is defined by
where x is the input, is the high threshold level, is the low threshold level, R is the rising dead-time, F is the falling dead-time, and t t is the loop sampling time.
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