Omicron CMC 310, Руководство пользователя

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OMICRON 31
Technical data
Deglitching input signals
In order to suppress short spurious pulses, a deglitching algorithm could be configured. The deglitch
process results in an additional dead time and introduces a signal delay. In order to be detected as a
valid signal level, the level of an input signal must have a constant value at least during the deglitch time.
The figure below illustrates the deglitch function.
Debouncing input signals
For input signals with a bouncing characteristic, a debounce function can be configured. This means that
the first change of the input signal causes the debounced input signal to be changed and then be kept
on this signal value for the duration of the debounce time.
The debounce function is placed after the deglitch function described above and both are realized by the
firmware of the
CMC 310 and are calculated in real time.
The figure below illustrates the debounce function. On the right-hand side of the figure, the debounce
time is too short. As a result, the debounced signal rises to "high" once again, even while the input signal
is still bouncing and does not drop to a low level until another T
debounce
period has expired.
The figure below illustrates the debounce function.
Data for potential-free operation
Trigger criteria
Logical 0
Logical 1
R >100 kΩ
R <10 kΩ
Input impedance 216 kΩ
Input signal
Input signal deglitched
T
deglitch
T
deglitch
Input signal
Input signal debounced
T
debounce
T
debounce
T
debounce