Biquad IIR Filter Core :: Overview
Project maintainers
Details
Name: biquad
Created: Sep 25, 2001
Updated: Oct 14, 2001
SVN: Browse
Statistics: View
Other project properties
Category: DSP core
Language:
Development status: Stable
Additional info:
none
WishBone Compliant: No
License:
Specifications
- IIR filter with two poles and two zeros
- Data width set by user
- Coefficient width set by user up to 16 bits
- Wishbone interface for read and write of filter coefficient registers
- Multiple filters can be combined to form filters with more than two poles and zeros
Description
The difference equation for the biquad filter is:
y[n] = b10*x[n] + b11*x[n-1] + b12*x[n-2] + a11*y[n-1] + a12*y[n-2]
This equation is implemented as shown below: