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# Iir Filter

235 Threads found on edaboard.com: Iir Filter

## Signed Multiplication VHDL, or real

You are apparently implementing a first order iir low-pass filter. For a low pass with unity gain, coefficients b and c sum to 1. I don't see how a meaningful low-pass implementation would have very small c values, resulting in b near to 1, or in other words about no filter effect. In contrast, a filter with large fc/fs (...)

## Digital Leaky Integrator (First order IIR digital LPF)

Hi I need some guidance regarding the implementation of Digital Leaky Integrator (First order iir digital LPF) using full custom flow. I implemented the following: (slide 32) Attached (Doc4.docx ) But the simulation in cadence take too much time and don't finish at a

## How to decide or select a filter type of an IIR filter

Hello, can someone explain what should be taken into account to select a particular type to use for the iir lowpass filter design. I am confused in the selection of the type to use to design the iir filter for lowpass implementation if needed fc=4Hz and sampling freq=100Hz for the data attached below. Thanks.102788

## How to build the filter function of an IIR filter if coefficients are available

Hello, I want to know how to build an iir filter function if the filter coefficients got form matlab are available. The lowpass iir filter designed in matlab is shown below with fc=4Hz,sample frequency=100Hz = cheby1(2,0.5,4/50,'low'); filter_output=filtfilt(b,a,signal); I used (...)

## Need help with the IIR fitler design to filter pulse signals

Hello, I already used an FIR lowpass fitler as shown below with a fc=4Hz and sampling freq=100Hz for the data attached Hf = fdesign.lowpass('N,Fc',31,4,100); Hd =design (Hf); Coeff= Hd.Numerator; data3= filtfilt(Hd.Numerator,1,a); But, I now I want to design the iir fitler for the same to check the difference between the [I

## Differences between the implemenation of IIR and FIR fitlers on microcontroller

Hello, Can someone explain the difference between the implementation of iir and FIR filter with microcontroller if I am planning to implement a lowpass filter Thanks.

## How to use IIR filter coefficients(FDA tool) to filter the signal

Hello, I generated the iir filter using the Matlab FDA tool.The filter parameters are Butterowrth,Lowpass,Order:10,fs=100Hz,fc=4Hz. I exported the fitler coeffcients to workspace but how to use these filter coefficients to filter a signal. The coefficients are as shown here . 102650 Thanks.

## Suggestions to select a filter method to use it for micrcontroller implementation

Hello, I am planning to implement a lowpass fitler of fc=2.6 Hz with a sampling rate of 100Hz on microcontroller(16-bit) using the filter coefficients generated from Matlab. But I am confused of which filter method to use FIR or the iir method to generate the fitler coefficients from Matlab designed filter. Can (...)

Hi.I am implementing a Low power iir filter in verilog,I have to discard the extra bits that comes at the output due to feedback.when the extra bits are discarded filter characteristics will some how get changed?give me any suggestion about specifications so that my filter response is stable and not very much affected

## Why is FIR filter easy to implement?

I have read in my textbook that the motivation behind the existence of FIR filter is "In particular, FIR filters are used for their ease of implementation and stability." The stability issue is quite easy to explain from the transfer function along with using certain stability criterion. But I don't understand why they are easy to implement.

## Determining filter archtecture from the frequency response

Is there an easy or straightforward way to analyze a frequency response plot/filter profile of a digital filter and determine it's architecture (number of taps, FIR vs iir, decimation rate, coefficients, etc) For example, what information do i have about the filter and it's implementation by looking these plots (these are (...)

## how to create iir filter in vhdl

hi evryone i m woking with fpga spartan 3 kit and i need to implement an iir filter with equation y(n)=∑_(k=0)^N+∑_(k=0)^M but i have problem in creating of this equation in vhdl can you help me?

## direct form and cascade form

how the direct form is most sensitivity to the coefficient quantization in iir filter. and cascade form is not much sensitive to the coefficient quantization in iir filter. how the direct form is more efficient in FIR filters.

## Design a low pass IIR filter to meet the following specification.provide design stage

Design a low pass iir filter to meet the following specification Sampling frequency 15KHZ pass band frequency 0-3KHz transition width 450Hz pass band ripple 0.5dB stop band attenuation 45dB Obtain the filter frequency response any body please (...)

## Design a low pass IIR filter to meet the following specification.provide design stage

Design a low pass iir filter to meet the following specification Sampling frequency 15KHZ pass band frequency 0-3KHz transition width 450Hz pass band ripple 0.5dB stop band attenuation 45dB Obtain the filter frequency response any body please help me i am stuck in this question, its for my final year Coursework

## Design of IIR Biquad Filters - Calculation of Filter Coefficents

Hello Audio Experts and aspirants, First of all i will try to put my agenda of my system: >capture of ubiquitous speech of a area under surveillance and further transfer it to a RF module that's it In that event i have chosen to use a stereo codec chip from TI - AIC3204 which has inbuilt programmable iir Bi-quad filter having a transfer

## Having Trouble With Designing IIR Filter on Frequency Transformation

Hello all, As written in title, I am having trouble with frequency transformation. There are three problems I am encountering right now. (1) Over-specification band pass filter I designed a 4th order chebyshev low pass filter which does satisfy given specification, in which - pass band edge frequency fp = 6500 Hz, - stop band edge freq

## adaptive IIR filter with TI C64xx family

Keep in mind that iir/FIR. specify the underlying filter structure, while adaptive refers to how the coefficients are updated. You probably are looking for an adaptive FIR filter that uses the LMS algorithm.

## Digital FIlter design need help

when i go for iir filter minimum order required is 14 but coefficient are so small(in term of 10 power -17) that i cant implement in FPGA. The statement is meaningles without telling the filter specification. Most likely, the problem is an unrealistic specification. which type of filter i should use which work well for ve

## help with IIR filter(low-pass filter with impulse invariance and ellipsoid )

here is the problem: i use impulse invariance transform to design low-pass filter, butterworth,chebyshev1 can perfectly achieve the requirements,but ellipsoid and chebyshev 2 can't achieve the Rs(Stopband attenuation) and here is my code and figure： Fs=400 fp=100;fs=120; Ap=1;As=20 Wp=2*fp*pi;Ws=2*fs*pi; =ellipord(Wp,Ws,Ap,As,