OrgApache/incubator-nuttx
OrgApache
/
incubator-nuttx
mirror of https://github.com/apache/incubator-nuttx.git
1
0
Fork 0
Code Issues Releases Wiki Activity

libdsp: update LP_FILTER comment 

add note about filter time constant (tau)
This commit is contained in:
raiden00pl 2023-10-19 12:14:45 +02:00 committed by Xiang Xiao
parent c164fc9b21
commit 93312c6196
2 changed files with 2 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
include/dsp.h
View File

@ -102,6 +102,7 @@
* filter = T * (2*PI) * f_c * filter = T * (2*PI) * f_c
* *
* phase shift = -arctan(f_in/f_c) * phase shift = -arctan(f_in/f_c)
* time constant = -T / (ln(1 - filter))
* *
* T - period at which the digital filter is being calculated * T - period at which the digital filter is being calculated
* f_in - input frequency of the filter * f_in - input frequency of the filter

1
include/dspb16.h
View File

@ -92,6 +92,7 @@
* filter = T * (2*PI) * f_c * filter = T * (2*PI) * f_c
* *
* phase shift = -arctan(f_in/f_c) * phase shift = -arctan(f_in/f_c)
* time constant = -T / (ln(1 - filter))
* *
* T - period at which the digital filter is being calculated * T - period at which the digital filter is being calculated
* f_in - input frequency of the filter * f_in - input frequency of the filter