1000 Threads found on edaboard.com: Low Pass Filter In Matlab
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: 1104
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
f=(1:length(X))*df;%% frequency (...)
Digital Signal Processing :: 05-24-2010 00:57 :: raaseth :: Replies: 4 :: Views: 17253
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: 675
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: 460
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: 1686
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: 2322
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 looking for some (...)
Digital Signal Processing :: 02-04-2011 14:50 :: bheaps :: Replies: 0 :: Views: 890
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: 896
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: 3712
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: 7739
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: 8041
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: 2322
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: 836
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: 475
Type fdatool in matlab. It'll open some GUI. Here you can specify :
>>your response type as lowpass
>>design method FIR (there will be a drop down menu...choose equiripple if you are not sure what to do with this)
>>select minimum order
>>choose Fs, Fpass and Fstop (Fstop - Fpass is your transition width) (...)
Digital Signal Processing :: 12-23-2013 08:12 :: 2010ee179 :: Replies: 1 :: Views: 329
I have a doubt regarding the concept of orthogonal filter bank. In case you're having filter P(w)=1+cosw, we all know that could be used to obtain low pass filter h0(w)=(1+e^-jw)/sqrt(2) using the relationship P=|C|^2. My question is when you're given even more complex filters like (...)
Digital Signal Processing :: 02-14-2014 14:31 :: Sonia1234 :: Replies: 0 :: Views: 198
i have a question about a digital filter ,plz help me
i design a band-pass filter in matlab ,i simulate this filter and all everything is ok but i need execute this filter in C with my application
but i do not know how can export to a header file or C file
plz help me ,thank
Digital Signal Processing :: 10-19-2012 03:38 :: hungthientu :: Replies: 0 :: Views: 258
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 stuck in RC filter (...)
Digital communication :: 12-24-2006 18:37 :: cmppolish2006 :: Replies: 0 :: Views: 3434
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: 1036
I want to realize a simple analog low-pass first order filter in matl ab, but i waant also obtain time domain output if an input signal is present. So:
1)input time domain signal is realized with an array of values (i'm not using symbolic)
2)fft of input signal: i consider only frequencies equal and under fs/2 (with fs=sampling frequency) (...)
Digital Signal Processing :: 01-05-2009 09:27 :: lionelgreenstreet :: Replies: 0 :: Views: 1539
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: 422
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 the attachment. (...)
Digital Signal Processing :: 07-07-2014 00:56 :: mahak walia :: Replies: 0 :: Views: 241
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: 1928
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: 868
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: 906
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: 1041
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: 869
I just designed an FIR filter in matlab, and saw the impulse response. I obtained a low pass filter. Up to now there were no problems. I read the cut-off frequency(0.144cycles/sample) and had 2 null frequencies at 0.325cycles/sample and 0.5cycles/sample.
Then I inputted a discrete sine wave block(with (...)
Digital Signal Processing :: 11-29-2006 18:34 :: dav_mt :: Replies: 3 :: Views: 1645
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 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: 1576
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: 1320
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: 1218
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: 657
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: 606
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: 384
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, which seems to be (...)
Analog Circuit Design :: 03-13-2012 02:30 :: anishsingh :: Replies: 1 :: Views: 309
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: 1198
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 ...
phase is defined as (...)
Analog Circuit Design :: 09-25-2012 03:41 :: talking :: Replies: 4 :: Views: 607
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: 311
i need basic idea about predisotortion...i m going to work with low pass filter at the input side and output side bandpass filter ..maily in my stsytem contains random intereger generator,qpsk modulato ,raise cosine filter then i waill apply awgn channel after that block i want to (...)
RF, Microwave, Antennas and Optics :: 02-08-2014 12:26 :: Bhavik Patel :: Replies: 0 :: Views: 357
The inductor should have the ability to pass the DC current without having its core saturate. Pay attention to the DC rating in the data sheet.
As far as the values, The inductor should have a high reactance compared to the E/I ratio (load impedance) and the shunt capacitor should have a low reactance.
Professional Hardware and Electronics Design :: 05-03-2005 11:00 :: flatulent :: Replies: 1 :: Views: 1804
can you tell me how can i make a low pass filter that can be used in recieving signals
with circut drawing please
RF, Microwave, Antennas and Optics :: 07-15-2005 11:13 :: Abdallah :: Replies: 2 :: Views: 662
I'm trying to do isolated voltage measurement of a pwm type signal. For this, i'm using LEM transducer. But LEM has a bandwidth of <10KHz. So it forces me to make the filtering of pwm signal in the high voltage side. I have some problems with this measurement. Lem has a resistance of ~250 ohm. With the current limiting resistor it has ~33k input re
Analog Circuit Design :: 08-17-2005 16:37 :: seyyah :: Replies: 3 :: Views: 1710
The complex poles will produce a flatter pass band followed by a sharper increase in attenuation in the stopband. At much higher frequency both types will have the same asymptotic roll off of 12 dB/octave.
Read up on topics such as Butterworth, Chebychev, and Bessel filter polynomials. All of these are the optimum method for a (...)
Analog Circuit Design :: 10-13-2005 22:27 :: flatulent :: Replies: 2 :: Views: 1364
can anyone explain to me the steps or stages to design a low-pass filter for vlsi design?i really dont have any far as im concerned,calculation is not suitable for layout design.then,how do i determine the resistors and capacitors value?what is the different between the practical filter circuit and a circuit for vlsi design?
Analog IC Design and Layout :: 12-12-2005 03:43 :: fareast :: Replies: 5 :: Views: 1513
For a band-pass filter, you can calculate its Q factor as f0/BW. For a low-pass filter, its f0 is same as BW, right? But I find some low-pass filter's Q value is 0.5 or 1.5, How it can be?
Analog IC Design and Layout :: 01-12-2006 20:06 :: cqmyg5 :: Replies: 6 :: Views: 1995
The higher the order of a filter, the steeper the gain/frequency slope will be. So for a given cutoff frequency, a higher order filter will give more attenuation of harmonics. The ultimate slope of a low pass filter is 6n dB/octave or 20ndB/decade.
Higher Q inductors and capacitors will (...)
Analog Circuit Design :: 01-16-2006 09:22 :: Kral :: Replies: 1 :: Views: 1084
with R=50K and C=2.2uF cut off frequency will be ≈1.5 Hz !!!!!!!
In the other hand in low pass filter, first we place resistor then capacitor,
not capacitor and then resistor as in you circuits.
In your schematic your lowpass filter located in feedback (...)
Electronic Elementary Questions :: 01-25-2006 03:37 :: Davood Amerion :: Replies: 9 :: Views: 1404
Im desigining a feedback system. Im extracting a dc point from the output of differential amplifier through a low pass filter. Now my problem is, i want to have a low cutoff frequency of 50kHz. But from the LPF response, my low cutoff freq is 5kHz which is very low. What I know (...)
Analog IC Design and Layout :: 01-24-2006 03:48 :: Anachip :: Replies: 2 :: Views: 1017