Digital IIR filter with APB interface

Overview

A range of 5th to 11th order digital IIR filters for conditioning and optionally decimating data from an external source and to DMA the output into processor memory.

The filter is available as an APB peripheral for easy configuration and control.

Key Features

Elliptic IIR filter response
Fully pipelined single cycle operation
Multiplierless 5th and 10th order designs
3 multipliers for 7th order filter
5 multipliers for 11th order filter
Very low resource requirements compared to FIR filters
Near linear phase passband
Optional decimate by 2
AMBA APB control register interface
DMA data interface

Benefits

Very low resource requirements
State space design for controlled word length growth
Within +/-1 LSB of floating point reference model
Very small compared to equivalent stopband rejection in an FIR filter

Block Diagram

Deliverables

RTL source code
Testbench with various stimulus generation
Synthesis scripts
MATLAB model

Technical Specifications

Foundry, Node

Any

Availability

Now

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