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Altera_Forum
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17 years ago

Low Pass IIR filter using cyclone II FPGA

Hi everyone, I hava a task to implement low pass iir filter on cyclone II FPGA. The parameters of filter are the following: fp=5kHz; pass band frequency fs=8kHz; stop band frequency Fs=44k...
Altera_Forum's avatar
Altera_Forum
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17 years ago

Use the direct ii-transpose structure. Not the direct form.

It's ideal on fixed-point IIR filtering, it minimizes quantization errors better than others.

In order to improve the performance use a rounding escheme.

Download the Mentor Graphics C header files ac_datatypes to test the arithmetic.