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# Iir Filter

235 Threads found on edaboard.com: Iir Filter

## ECG filter using chebyshev filter

...help me with further filtering process, either iir or FIR...the sampling ratewas 500Hz. is this rate ok?... Hi In ECG measurements, the most usual sampling rate is something 'even' multiple of standard main AC frequency in the country ( i.e.: n*2*60Hz / n*2*50Hz ). I worked with 240Hz. The reason to suc

## Output Length of singal filtered using FIR Filters

help filter I expect if you read the docs, you'll find some option to get the extra samples at the end (for the FIR case). likewise there's probably an option to provide initial conditions for iir filters.

## Important of coefficients

the coefficients play a large role in the filter design. Any FIR filter can be normalized (not including quantization issues). stable iir filters can also be normalized (and excluding quantization issues).

## downsampling a wave file

You can implement that with a FIR or iir digital filter in Matab. The iir is better

## Digital IIR Filter with variable cutting frequency

Hi, I want to design a iir low pass filter with variable cutting frequency. The order should be > 10. Order 1 or 2 is simple to be made. But when it comes to order > 4 the equation are pretty big and it's not feasibly anymore. I don't search for something very precises. I need resolution for the Fc (cutting frequency) and not accuracy. E.g.:

## I need only verilog code for a delta-sigma adc..........

I am using CCS compiler. i need a coding for butterworth and chebyshev filter design for 4th order.... how to write a coding to generate coefficients for this filter...please help me...

## Matlab FIR and IIR (little help with simple task)

I am total beginner using Matlab so I need some help creating FIR and iir filters with Mathlab. I have read audiofile: x=wavread('C:\Pinkpatka.wav',175142); and I should filter it with FIR, which have these factors: I must also filter it with iir, which have factors b=, a=

## Auto day and night light

Actually the real schematic should include strong iir filter over the measured from the opto resistor signal. This is required to avoid the triggering on/off of the relay if some object is passing in front of the sensor (flying bird) or some strong light source is pointed towards the sensor (car lights). Optically the sensor should have as wider an

## designing bandpass filter

Hi, Can you please elaborate further on what kind of a filter you wish to implement? iir or FIR? And what is the sampling frequency for your problem? Also is the higher frequency cutoff 40KHz or 40MHz? Mohit

## Filter's type - matlab function

Hey, i've line in matlab example code: LPF = LPF_b*LPF_prev + LPF_a*mixer_I + LPF_a*mixer_I_prev ; This is part of 'for' loop where is signal 'mixer_I' filtering. I see this is iir but I dont know how could I write its transfer function. This is one of LPF in costas loop. I cant find any theory about designing this kind of fi

## Design a digital Butterworth low pass filter using bilinear transformation method

You can refer Digital Signal processing by nagoore gani so many examples are there. *first you calculate order and find H(S) then convert H(Z) When S=2/T(1-Z-1)/(1+Z-1) iir filter Design hye guyz,i really need help for this question, Design a digital Butterworth low pass filter using bilinear transformati

## help iir filter coefficents generated in scilabs

Hi given a single pole butterworth filter how would one generate the coefficents for a filter (iir). using scilabs? I plan to use this in a microcontroller, so any help would be appreciated? thanks cool

## Design Of Peaking Filter

Classical analog graphic equalizers are using low order filters as far as I'm aware of. From the shown frequency characteristics, this is also true for their DSP based successors. So simple iir filters should serve the purpose. But I don't understand your considerations related to pole zero locations. Generally, (...)

## Inverse IIR Filter - computing the inverse of a filter

Refer the attached text for example of iir Inverse filter (Ex 5.5: iirinverse)

## IIR 2nd order notch filter in VHDL

Hello all, I need to design a iir 2nd order notch filter with notching frequency of 50 Hz. & 500 Hz as sampling rate. Matlab HDL code generator is not generating the code. can anyone suggest me something or provide me a VHDL code for the same. thanks in advance

## Design of IIR filter in VHDL

Hello All, I am trying to design an iir filter using VHDL with very little knowledge about filters, A 1st order iir filter with serial data input - & serial data output. Any help would be highly appreciated.

## IIR Filter using multi-rate techniques

Hi every body I study "the iir ilters for Satellite Transponder Using Multi-rate Techniques". Would you please give me some ebook or website? thanks

## What are the applications of FIR filter?

There is nearly nothing to add - perhaps one FIR property which in many cases is important: FIR filters have a linear phase function (opposite to iir filters).

## Help me to design IIR filter with PIC

hey all! i will design digital filter that is iir. i will this design with pic. i have coefficients of filter. but i need code for pic . and my pic is 18XX or 16XX. filter is high pass-butterworth and cut-off frequency is 300hz. and input signal is 200hz square waveform . can u help me :?: