Fully Pipelined Low-Pass IIR Filter

Fully Pipelined Low-Pass IIR Filter


Category: DSP Core

Created: February 01, 2010

Updated: January 27, 2020

Language: VHDL

Other project properties

Development Status: Stable

WishBone compliant: No

WishBone version: n/a

License: LGPL


Low-Pass IIR Filter IP core is a unit to perform the Infinite Impulse Responce (IIR) low pass filter which pass frequency is tuned dynamically

Main Features:

  • Dynamically tuned passband cutoff frequency in the range of 0.1 to 0.4 of the sampling frequency. The frequency is set by the 12-bit code with the linear scale.
  • using 8-staged wave digital filter scheme of the 33-d order provides both sharp frequency responce – up to 100 db/ octave - and high stopband ripple – up to 80 db. Besides the passband ripple not succedes -2,5%, or –0,23db in the whole frequency range.
  • IIR wave digital filters provide both possibility to tune the cutoff frequency and excellent stability.
  • Fully pipelined structure provide both high clock frequency – up to 120 MHz, high sampling frequency – up to 15 MHz – and low hardware volume – 960 CLB slices and 3 DSP48 units in Xilinx Virtex2P FPGA device.

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