User guide

GEL100340
Low-Pass-Filter
Law-Pass-Filter
Description
It performs a discrete first order low pass filter. User can set the time constant FilterTau [set]. It is possible to
Reset the output, or Disable the calculation.
It is the discretization of the continuous first order low pass filter, described by the following Laplace transfer
function:
F(s) = -.-!L- = -
1
1+2 - s l+&
c
Ml
where z [set] is the time constant of the filter and lo, [radkec] is the cut-off frequency and.
The relation between these two values is:
2= $- [set]
c
fez
while the relation with the cut-off frequency f, [Hz] is:
The pole zero matching is used to get the following discrete transfer function F,(z):
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