1000 Threads found on edaboard.com: Low Pass Filter Code In Matlab
I wish to implement a discrete High-pass-filter (HPF) in matlab/Simulink. I found a discrete low-pass-filter (LPF) in one of the Simulink examples as z
fc: cut-off frequency
Tsc: sampling period
Electronic Elementary Questions :: 05-09-2009 13:15 :: powersys :: Replies: 2 :: Views: 7523
From books I saw the following low pass filter configuration (A) in PLL:
Analog Circuit Design :: 12-08-2004 21:02 :: jordan76 :: Replies: 5 :: Views: 863
I am just curious where the some energy will go in filtering....
1) Say, just simple RC low pass filter ( R in series with input and output and C is tapped at the output)....
Obviously, the some (high freq. part) of frequency contents in the input signal won't be passed through to the (...)
Analog Circuit Design :: 05-29-2006 23:11 :: ee484 :: Replies: 0 :: Views: 866
I want to implement FIR filter on AVR microcontroller with C programming language.
I decided test my code in matlab and after that implement it on C.(codevision Compiler)
My code is here. I think it don't work!!!
I generated sine wave with 50Hz and added noise to it.
After that, I designed a (...)
Digital Signal Processing :: 12-14-2010 15:55 :: vahubl :: Replies: 3 :: Views: 3010
Below Cuttoff Frequency all the frequencies pass through the filter . Above it as frequency increases more the attenuation in decibels for a low pass filter.
Attenuation in dB is 20 log10 ( x )
Higher the order of a filter more sharper the transition is and hence (...)
Electronic Elementary Questions :: 07-03-2006 02:36 :: starfish :: Replies: 2 :: Views: 1342
Can anyone suggest some documentation regarding the design of a simple low pass filter ?
Thx in advance.
Analog IC Design and Layout :: 02-22-2009 04:40 :: _SquiD_ :: Replies: 0 :: Views: 611
Dear All I have this matlab code which convert the time to frequency domain but b4 this i want to add a low pass filter. can some one help me pls.
dt=1/fs;%% time interval
t=(1:length(x))*dt; %%time vector
df=1/(length(x)*dt); %% frequency interval (...)
Digital Signal Processing :: 05-24-2010 00:57 :: raaseth :: Replies: 4 :: Views: 17206
hi, how to write matlab code for RC 1st order low pass filter??
i saw many matlab codes from internet , like butterworth, chebychev...
but don't have the one for RC low pass filter??
pls advice how to do it? i was (...)
Digital communication :: 12-24-2006 18:37 :: cmppolish2006 :: Replies: 0 :: Views: 3430
I have one problem.
I have a data vector. for example : data=rand(1,n) ; n=100;
I want to obtain discrete fourier transform of it by DCT command.
and then,by a low-pass filter,remove unwanted high frequencies of larger than f1.
f1 is determined.
and finally , again convert filtered data from discrete frequency domain to (...)
Mathematics and Physics :: 04-22-2013 12:01 :: ghasem_008 :: Replies: 0 :: Views: 670
I am new to matlab and just started learning the thing.
how to design 3x3 loww pass filter with custom coefficient ? and how to apply that filter on image ?
Digital Signal Processing :: 04-21-2014 01:15 :: rahul.achates :: Replies: 6 :: Views: 452
required matlab code for low pass filtering of a digital sequence
i want how to found the value of this every elemnt in it after passing through low pass filter i requesting matlab code for it
Digital Signal Processing :: 03-24-2009 15:22 :: sayurabh :: Replies: 1 :: Views: 2491
I have written a code which emulates a qpsk tx n rx system. it works perfectly and i'm getting the BER curve exactly.
As my next task i have been asked to design an fir low pass filter through which i am to pass the qpsk signal. i'm not getting much assistance from the guide and i'm pretty much on (...)
Digital Signal Processing :: 01-29-2010 06:00 :: shubhs9 :: Replies: 5 :: Views: 4801
i nned this,
Implement SSB AM signal from DSB signal without using low pass filter in matlab
can any one hep me...?
Digital Signal Processing :: 12-08-2010 12:08 :: myhumps007 :: Replies: 1 :: Views: 1102
I am doing thesis in optimization of low pass filter using particle swarm optimization. Desigining and optimization is done in matlab. I have write the matlab code for the simple designing of low pass filter that is available in (...)
Digital Signal Processing :: 07-07-2014 00:56 :: mahak walia :: Replies: 0 :: Views: 236
I was asked to design a low pass filter that would attenuate the aliased frequencies by at least 60dB. I am using the fir1(n, wn) function. But no matter how I adjust the order n and corner/cutoff frequency wn, I can not make the attenuation less than 60dB, the highest point of the stop-band ripple is always around -52dB. The (...)
Digital Signal Processing :: 09-29-2005 14:45 :: triquent :: Replies: 4 :: Views: 3703
help me to simulate microstrip low pass filter using FDTD
with matlab program
Thanks for all
Electromagnetic Design and Simulation :: 08-28-2008 21:18 :: nafah :: Replies: 0 :: Views: 1033
Im using SciCosLab4.4, and using SciCos for my project.
Im trying to add a low pass filter to a circuit started by Sinusoidal Generators
Im using SciFunc and I need some example code of a low pass filter in a SciFunc, Ive been unsucessful in implementing one
Im also (...)
Digital Signal Processing :: 02-04-2011 14:50 :: bheaps :: Replies: 0 :: Views: 887
I Need a Little Help of Designing FIR low pass filter Using Z Parameters matlab
I've searched and look for any information that would help to start doing such assignment. I was asked to design DSP processor - low pass filter using some blocks and parameters. (...)
Digital Signal Processing :: 01-23-2012 06:25 :: snikfreak :: Replies: 1 :: Views: 420
I have designed LC low-pass filter. The following code analyzes mag/phase bode plot of the filter.
You would see the phase curve shows from 0 to -180 deg from the results (see the attached.) of the following code. But it doesn't make sense, because ... (...)
Analog Circuit Design :: 09-25-2012 03:41 :: talking :: Replies: 4 :: Views: 605
below is a link for an article about cross coupled Al
RF, Microwave, Antennas and Optics :: 11-27-2003 07:37 :: AL0117 :: Replies: 6 :: Views: 1924
Here is an example of a low-pass filter (in this case it is for video band) which you can modify by recalculating LC values for the audio-band ..
As you can see, the first stage is a simple buffer, whereas the last stage is an amplifier which compensates for passive filter loses
Analog IC Design and Layout :: 11-21-2005 20:37 :: IanP :: Replies: 10 :: Views: 7724
I am designning a pal encoder now.I had learned that there should be a notch filter for luminance signal to aviod crosstalk with chrominance I designed a bandstop filter in matlab.But the attennulation of high frequency does not meet my porpose.Should I design a low pass (...)
Digital Signal Processing :: 11-24-2005 03:57 :: yesize :: Replies: 0 :: Views: 903
I want to design a op-amp on 0.18u CMOS process, which could be suitable for this low-pass filter.
For simulating the op-amp, I have to define the load cap and load resistor, what's the value? it's 2.653pF and 70.71k/100k as showed in the figure? OR, it's not neseccery to care about these cap/res
Analog IC Design and Layout :: 01-25-2006 22:06 :: cqmyg5 :: Replies: 2 :: Views: 970
see the following picture, it is a 2 order sallen-key butter-worth filter
Analog IC Design and Layout :: 03-16-2006 00:23 :: mists :: Replies: 3 :: Views: 1040
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: current filtered (...)
Microcontrollers :: 08-18-2006 21:29 :: jjyeh1976 :: Replies: 3 :: Views: 1787
how to design -a LPF(fir) by window method sampling freq=100hz and cut off=20khz..without using FFT builtin function.
plz can u give me a code(program) to implement this using matlab softwear.please.
Digital Signal Processing :: 02-01-2007 23:38 :: bharathchandra :: Replies: 2 :: Views: 4657
I am using fdatool, but the parameters are from 0.1 to 0.9 or something like that,
how do I translate a 4khz low pass filter into these coordinates.
Digital Signal Processing :: 02-20-2007 00:49 :: mehboob_iiui :: Replies: 7 :: Views: 1156
Hi, everybody. I want a ideal low pass filter to be added to the output of a circuit .
Is there ideal low pass filter in Cadence library?
Analog Circuit Design :: 01-20-2008 00:01 :: Fred_fu :: Replies: 1 :: Views: 1680
Does anybody know how to simulate the low pass filter with spectre in cadence?
Software Requests :: 05-05-2009 08:36 :: mustangyhz :: Replies: 0 :: Views: 347
The schematic of a car radio amplifier using the TA8225H amplifier IC is in Toshiba's datasheet.
It shows a block diagram of the IC's circuit but no details.
The amplifier circuit shows a flat frequency response to above 100kHz without a lowpass filter.
Analog Circuit Design :: 06-02-2009 07:43 :: Audioguru :: Replies: 3 :: Views: 2316
The time constant in an RC circuit or low pass filter is related to the cut off frequency τ=1/2πfc...
but is this the same with an active implementation ....meaning implementing the same filter using an op amp
Electronic Elementary Questions :: 06-26-2009 03:13 :: watertreader :: Replies: 1 :: Views: 1571
:| hi i need verilog code for low pass filter..
RF, Microwave, Antennas and Optics :: 07-18-2009 02:34 :: praveentammali :: Replies: 0 :: Views: 1142
im the beginers in study of matlab...
can i know how can i use GUI to create the low pass filter..
with butterworth type and using bilinear method...
im stuck with this...
Digital Signal Processing :: 09-14-2009 21:43 :: awanis :: Replies: 5 :: Views: 1316
I need circuit diagram for
low pass filter output 100hz,8 order..
MOD: Subject edited to make the query clear
Hobby Circuits and Small Projects Problems :: 12-15-2009 10:36 :: m33tnick :: Replies: 3 :: Views: 1215
I have a signal vector and I wanted to low pass filter it. My knowledge of discrete filters is very limited so any help would be greatly appreciated.
My signal is basically a sampled instance of a sum of sinusoids of 100Hz and 1KHz. What I want to do is basically filter this sampled (...)
Digital Signal Processing :: 03-02-2010 14:28 :: aryajur :: Replies: 0 :: Views: 8024
hi everybody h r u?
i am new to this forum and also i am new to microwave field ,will my project is on microstrip butterworth low pass filter and i am using CST microwave studio(EM simulation diagram) so i don't how to put two and more microstrips together to form the filter,whether each two microstrips are added together (...)
RF, Microwave, Antennas and Optics :: 07-13-2010 16:42 :: ahmeddeia :: Replies: 0 :: Views: 656
Please anyone post the verilog code for Biquad low pass filter.
Digital Signal Processing :: 08-25-2010 02:44 :: kishram4u :: Replies: 0 :: Views: 1366
I Need to implement a low pass filter in an FPGA. I am very confident with FPGA's and DSP theory. I am not confident in selecting a DSP filter.
My A/D's are sampling at 1MHz. I want my low pass to be at 100Hz. The problem i am noticing is that 1e2/1e6 is a small number and the (...)
Digital Signal Processing :: 03-09-2011 11:57 :: roofingboom :: Replies: 0 :: Views: 891
I need the program of a low pass filter for sinusoidal signal.
The signal is generated in matlab and a doppler(interference) is added to it now i need to remove the doppler using a low pass filter. This low pass filter (...)
Digital Signal Processing :: 04-03-2011 14:56 :: re_289 :: Replies: 1 :: Views: 605
Program of chebyshev low pass filter
Software Links :: 07-08-2011 05:58 :: aryasubhash92 :: Replies: 3 :: Views: 48
Designing a 5th order filter with only 8 bit data width seems pretty meaningless, but may be O.K. as an exercise. Assuming you want to keep at least the 8 bit resolution in the filter output most likely implies higher internal resolution and possibly higher coefficients resolution.
In any case, it's more a DSP numerical than particularly a Veril
Digital Signal Processing :: 07-16-2011 06:31 :: FvM :: Replies: 4 :: Views: 2310
Hi can anyone help me choose the best function in matlab to implement fir low pass filter given the following specs.
1. sampling frequency, Fs= ( 1.08332e6)
2. number of samples, N = 21.
3. passband ripple, Apass= 0.01dB.
4. Stopband ripple, Astop= 40dB.
Digital Signal Processing :: 08-11-2011 09:20 :: bjmoloi :: Replies: 2 :: Views: 382
can anyone help me with the cutoff frequency for third order passive low pass filter with three stage RC filter circuit.i tried to derive it but its very very compex transfer function.
Please let me know any reference of the cut off frequency expression for three stage low (...)
Analog Circuit Design :: 11-18-2011 07:41 :: singhji0000 :: Replies: 2 :: Views: 949
i am working on PID in which i need to design low pass filter so that the d term is free of noise. i have got a link in which the lpf is applied . i dont understand it, how to design software based low pass filter and how to set the value of the constants c1, c2 in it?
here is link
Microcontrollers :: 01-10-2012 07:56 :: garg29 :: Replies: 0 :: Views: 595
Hi , I have tried to make a low pass filter of sallen key topology with a folded cascode OTA + a common drain stage and resistive feedback. The frequency response is coming out to be correct and phase margin of around 70 deg. But giving a step i/p from 0 to 1 volts, i get a spiky response which settles to its initial value, (...)
Analog Circuit Design :: 03-13-2012 02:30 :: anishsingh :: Replies: 1 :: Views: 308
How to extract dc component from a signal in simulink using low pass filter?
The source frequency is 50HZ and I would like to extract the dc component of the signal.
I am using low pass filter in simulink but I do not know how to determine the cut off frequncy?
The signal dc component (...)
Power Electronics :: 03-27-2012 05:44 :: sunnycfc9 :: Replies: 0 :: Views: 832
COULD ANY ONE POST ME THE VHDL code FOR 4 TAP FIR low pass filter.
Please it is very urgent.
Thanks in advance
Digital Signal Processing :: 05-23-2012 02:13 :: SALMA SULTANA :: Replies: 0 :: Views: 360
You can follow your LPF with an all-pass filter (or some other phase-compensating network) to adjust the phase.
Electronic Elementary Questions :: 07-03-2012 09:10 :: barry :: Replies: 4 :: Views: 1190
I am triying to simulate fir low pass filter in vhdl test bench, I get square waves from matlab as txt document, and I use ip cores for filter which I produced in matlab in fdatool. I am using text-io in the testbech.
I have two questions
1-Square wave is 100Hz but in txt there (...)
PLD, SPLD, GAL, CPLD, FPGA Design :: 03-03-2013 10:14 :: vhdltestbench :: Replies: 0 :: Views: 472
i am trying to design FIR low pass filter with i/p 8 bits
i know that when i multiply i increase the double the bits width ex: 1111 * 1111 = 1110 0001
and when i add two numbers i increase the bits width by 1 ex: 1111+0011= 10010
my problem is : the input bits is 8 bit and the output after adding and multiplying becomes 20
PLD, SPLD, GAL, CPLD, FPGA Design :: 12-17-2013 07:46 :: Mina Magdy :: Replies: 6 :: Views: 305