* Added header license for the files that didn't have
* Modified parentheses
* Removed extra spaces at the end of lines
* Fixed parameters list to be each parameter on its line
* Deleted lines after endmodule and consecutive empty lines
* Fixed indentation
Signed-off-by: Iulia Moldovan <iulia.moldovan@analog.com>
Move the subtraction outside of the always block. In this way we're not adding
an additional delay element on to the output of the differentiator,
which brakes the transfer function of the filter.