Difference between revisions of "Discrete Filter"

From T-VEC Wiki
Jump to: navigation, search
Line 7: Line 7:
 
<table>
 
<table>
 
<pre>
 
<pre>
Discrete filter:   
+
Discrete Transfer Function:   
  
 
         A.z + B
 
         A.z + B
Line 14: Line 14:
  
 
where A, B, C, D are real numbers
 
where A, B, C, D are real numbers
 +
 +
or Alternatively a
 +
 +
Discrete Filter:
 +
 +
        A + B.z^-1
 +
        ----------
 +
        D + C.z^-1
 +
  
 
The output of the function is defined as  
 
The output of the function is defined as  
Line 23: Line 32:
 
     In.z0 : current input
 
     In.z0 : current input
 
     In.z-1: previous input
 
     In.z-1: previous input
 +
 +
NOTE: these 2 specifications are equivalent, one form is used by control engineers and the other is used by filter designers. The output function definition is the same regardless.
 
</pre>
 
</pre>
 
</table>
 
</table>

Revision as of 14:12, 20 February 2007