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# Iir Filter

235 Threads found on edaboard.com: Iir Filter

## Why do FIR filters lead to instability?

No, it wont. Because FIR filter is working in an open loop configuration. But iir filter uses a closed loop +ve feedback which will make it stable in certain regions only. But iir filters are compact than FIR ones and requires few memory elements.

## DSP FILTER (FIR and IIR)

helo, can anyone show me some guidance to build a DSP filter (FIR or iir) on altera FPGA?? im using FLEX 10K

## linear phase IIR filter

although iir filter is not linear phase, but in face you only care your interested band. And most iir filter can keep near linear in your interested band, although tthere must be nonlinear in all band. You can see a bessel iir filter, in 0 to fs/s band it is not linear, but in 0 to fs/10 (...)

## iir implementation in fpga problem!!!!!!!!!

of course, you can implementation iir as a FIR filter, and only with one multiplier. such as y(n) = b(0)*x(n) + b(1)*x(n-1) + a(0)*y(n-1). You can use register store x(n), x(n-1) and y(n-1), and Time division using the multiplier, and accumulute three multiplier outputs to get y(n). After get y(n), replace y(n-1) register with y(n), and same t

Hi all, I have a problem. I am into designing an array of bandpass filters so that it forms a filter bank. I have designed the filter in matlab using fdatool and generated the hdl (verilog) code from it.it's a 6'th order bpf with 3 biquads(iir Butterworth). pls do let me know that if i can reuse this (...)

## 50 Hz high pass filter

hi, I want to design 50 Hz high pass filter iir can any one give me analog transfer function of HPF so by using Bilinear tf i can designe it. plz help me regards

## iir filter problem..really need help...

= cheby2(2,40,); can some 1 explain to me tis command? the freq1 and freq2 is cutoff freq, how can i find the cutoff freq ? = tf2sos (B2, A2,'up','inf'); <---can also explain to me this command? i very blur to do this all... but it is my final year project... please guide me....

## How to design a filter to suppress a signal above 2M ?

to achieve a sharp (brick wall) filter using FIR filter, results in high order of filter but using an iir filter results in disturbed phase response. so you must trade off between your demands to design your desigered filter. its the art of filter design. anyway, using (...)

## Implementation of an algorithm in FPGA

Hai all, I am trying to do hardware implementation of an algorithm in FPGA. I am attaching the basic block diagram of the algorithm. I did figure out the way to implement iir filter in FPGA and I thought to implement the other blocks ( which are in the block diagram) by writing VHDL code. But I am supposed to do implement the other blocks by findin

## implementation of Digital filters in FPGAs

Hai all, I would like to implement 2nd-order iir digital filter in FPGA. I wrote Matlab code and I found the block diagram. But Im not sure how to implement in FPGA. Any help is greatly appreciated. Thanks If you have the money, you can get system generator with simulink. That will allow you to design your

## implementation of digital filters

Hai all, I would like to implement 2nd-order iir digital filter in FPGA. I wrote Matlab code and I found the block diagram. But Im not sure how to implement in FPGA. Any help is greatly appreciated. Thanks

## filter code in microcontroller(8051)

Hi, You can try to use iir filter, it's easy to use in c. because you only want the range of 20 to 400hz, you must calculate twice, low pass and high pass. while impliment low pass filter, you can use Yn=A0*Xn+B1*Yn-1, where Yn: current filtered value, Xn: current sampled value, Yn-1: previous (...)

## Help,IIR Wavelet Filter Bank

I want to perform on-line multiresolution analysis of real-time signal using wavelet transform. Is it possible to use iir filter bank? If yes, give some usefull links.

## Digital Filter Desigin Services

DF-Design - Digital filter Design Program DF-Design is a FIR and iir digital filter design/analysis program written in ISO/ANSI C, and being developed by Yoji Yamada laboratories of Ishikawa National College of Technology. Being as it was initially created as a tool to be used in

## FFT FILTER DESIN BY USING VHDL/VERILOG

hi, you can make a iir filter in many differently ways. look at an specific book... like "Digital Signal Processing" by Alan V. Oppenheim and Ronald W. Schafer or look at MATLAB (release 14 at least) tutorial. There are many ways to do a iir filter in a digital computer. Then you can translate the digital form (...)

## Looking for active bandpass filter circuit

Dear Try filter Solutions. about filter Solutions : filter Solutions is a comprehensive PC based filter synthesis and analysis software package. filter Solutions provides passive and active circuit synthesis and modification analysis with parasitic effects, and digital filter (...)

## How to write IIR filter equation in vhdl ?

Hi all, How to write iir filter equation in vhdl ? ie y(n) = a0 * x(n) + y(n-1) * b0; -- iir filter The problem is, here, we are using output as input. Input bus width and output bus width are not same. Then how to handle this situation ? example : entity entity_iir_filter (...)

## variance round off noise error

Hi all, i have to compute the normalized arithmetic round-off noise error for a direct form II realization of an iir digital filter. For a Form II realization, there are 2 adders, so there will be two errors altogether.Assuming that the error values are the same on both adders, Qn1) The first error signal e1 will pass through the whole sys

## IIR filter.Can someone guides me?

Hi all, Can someone help me with this design question, i have worked out the steps to do the problem. Can someone help me scanned through it and see if i missed out anything. Qn) what should be the reasonable value which i should choose for 'fp in "step 2"? steps: 1) Required to find the prototype lowpass cutoff frequency for 'f

## about Phase and amplitude compensation filter

I want to design a phase and amplitude compensation filter. Fisrt Problem is I want to design FIR phase compensation filter , while matlab only support iir phase compensation, who know FIR phase compensation filter design command? Another problem is for amplitude compensation, as I only compensate signal band, not all (...)