1000 Threads found on edaboard.com: Filter Equations
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RF, Microwave, Antennas and Optics :: 09-17-2001 07:22 :: Robin Hood :: Replies: 0 :: Views: 1890
hai i need your help in my project i.e disease detection using gabor filter .
i dont know any thing about gabor filter.
initially i want to know what know what are input of gabor filter ,equations and code .
so, please help.
PLD, SPLD, GAL, CPLD, FPGA Design :: 12-12-2012 00:55 :: gsomesh :: Replies: 2 :: Views: 530
I found some FIR software at:
This appears to be free software. However, it is expecting an input file in an Agilent ASCII Tab delimited format. I have data what I captured with an ADC. I know the sampling interval. But I do not have the correct format for this Agil
Digital Signal Processing :: 07-09-2012 12:53 :: banjo :: Replies: 2 :: Views: 419
is a discussion of this filter. It appears to be an ad hoc type.
From the graphs and the use, a parabolic filter would also work. It has the fastest rise time without overshoot for a given noise bandwidth. There is a graphical method (in the S plane) to obtain the pole locations whi
Analog Circuit Design :: 03-28-2005 16:57 :: flatulent :: Replies: 3 :: Views: 1015
how to obtain discrete time state equations for kalman filter
Digital Signal Processing :: 04-16-2006 12:59 :: PMW :: Replies: 0 :: Views: 681
In the kalman filter,how does one define the matrices .such as R(n) is said as covarince of the nosie vector.OF what size should this be and do u determine the element values of the matrix.Can anyone pls help in the implementing the equations of the kalaman filter.I have the input vector and the state vector with me,I am not sure how to (...)
Digital Signal Processing :: 03-22-2007 06:51 :: deepa :: Replies: 2 :: Views: 1057
I'm currently trying to make a few line traps and have been doing a little reading. I found that these guys used a T filter with some lumped element components. They didn't describe how they did it so I'm a little confused.
I am trying to block a range of frequencies. They blocked 1 MHz to 10 MHz (they get high attenuation in this band). I want
RF, Microwave, Antennas and Optics :: 03-25-2010 16:22 :: infinite_gbps :: Replies: 1 :: Views: 443
I have a problem with max281 IC; this is a 5th order bessel filter IC.
I find values of R an C (input signal of IC) for a 10 Hz filter.
and for a 100 hz filter?
and the CLOCK frequency?
ps. excuse me for my poor english! :oops:
Other Design :: 01-25-2003 14:07 :: femtoman :: Replies: 2 :: Views: 1792
is a free online waveguide filter designer.
RF, Microwave, Antennas and Optics :: 02-05-2003 14:04 :: flatulent :: Replies: 3 :: Views: 1439
Do you have any idea of how to make transmission zero? I reallize the best way is using CQ filter to make TZ, but in papers, most authors list the useless equations to realize correct filter pattern. Is there anyone have experiences in it? Please share me that. Thanks.
Other Design :: 02-17-2003 08:03 :: tungchang :: Replies: 0 :: Views: 1104
what is CQ filter?
RF, Microwave, Antennas and Optics :: 02-18-2003 16:24 :: u_f_o :: Replies: 3 :: Views: 1402
this one shows the use of wienner filtering in image processing:
As you know matlab provides complete m files, easy to use and ready.
Also this one is interesting:
Also you know that there is a famous book Adaptive filtering, which is a fam
Digital Signal Processing :: 09-04-2004 12:21 :: mami_hacky :: Replies: 5 :: Views: 2466
How could I get an arc 2D for exciting with wave port a ustrip filter with a circular sustract?
Thanks for all and Regards.
Electromagnetic Design and Simulation :: 11-03-2004 14:05 :: sandruska :: Replies: 2 :: Views: 649
hi, gentlemen. i am designing a 8th-order lowpass cheby1 filter for my first career, i've got the transfer function(i call this function one) after approximation and denormalization based on the specification. i wanna choose the Gm-c type for my realization and i am looking for some proper topology for that. could u tell me how to get the coefficie
Analog Circuit Design :: 11-23-2004 08:33 :: neo :: Replies: 1 :: Views: 878
I am designing c cupled Chebyshev bandpass filter using equations in Hunter's book. by simulating this filter using MWoffice
I found that this filter is very sensitive for element variation
How can i reduse this sensitivity?
RF, Microwave, Antennas and Optics :: 02-21-2005 14:09 :: rf100 :: Replies: 0 :: Views: 468
I would to measure the S parameters of a saw filter. Its input is single and its output is balanced. Is it possible to measure it without using balun. Any materials??Thanks for your help.
RF, Microwave, Antennas and Optics :: 05-18-2005 16:15 :: RFCMOS :: Replies: 3 :: Views: 838
the component of vector input is alway assumed equal zero. My question is if the input vector is not equal zero, what is the influence on the equations of Kalman filter.
Um..I'm not quite sure what your question is but...The purpose of Kalman filter is for estimation of states from observations. Usually, if the input is not somet
Digital Signal Processing :: 06-22-2005 18:35 :: me2please :: Replies: 2 :: Views: 1330
I've grasped the idea of an ordinary Kalman filter and created a program that tracks a noisy signal. However when it comes to modifying the program to an EKF I'm at a total loss. I've spent weeks reading up on this and searching for examples, but I'm still unable to figure how to calculate the modified equations
(especially the J
Mathematics and Physics :: 06-27-2005 07:00 :: Ultimâ :: Replies: 2 :: Views: 1374
according to my experiances, i find curveletes more and more effective than gabor filters
if your image content is curves such as fingerprints you can enhance is very effective with curvelets
Digital Signal Processing :: 09-28-2006 14:27 :: ali :: Replies: 33 :: Views: 26735
I'm interested in the advantages and disadvantages of the analog "leapfrog" filter architecture. Any references, design equations, sensitivity analyses, etc would be helpful.
Analog Circuit Design :: 10-20-2005 17:34 :: Kral :: Replies: 0 :: Views: 886
Someone can show how can i calculate the transfer function of the attached filter circuit (transfer function in frequence domain H(ω))
Mathematics and Physics :: 11-03-2005 20:04 :: Highlander-SP :: Replies: 5 :: Views: 976
Hello, information here could be helpful:
Calculation gives R~10KOHm and C~several nF
These are reasonable for board level implementation.
Analog Circuit Design :: 03-09-2006 09:27 :: jcpu :: Replies: 6 :: Views: 1334
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"?
1) Required to find the prototype lowpass cutoff frequency for 'f
Digital Signal Processing :: 03-26-2006 00:58 :: scdoro :: Replies: 5 :: Views: 815
It is stated in oppeheim's book that, if we know the exact location of "r" alternations, and we decided the number of taps of the filter, then we can settle the coefficients of the filter by solving linear equations.
My question is that how we know the exact locations of those alternations?
Digital Signal Processing :: 05-14-2006 10:30 :: neoflash :: Replies: 1 :: Views: 634
I want to resample an audio file from 44.1khz to 48kHz , and I will use a fractional delay filter , who can tell me how to design a fractional delay filter of farrow structure , an example will be a great help.
Digital Signal Processing :: 07-10-2006 06:35 :: leofy :: Replies: 2 :: Views: 3780
I need to design a OTA bandpass filter. I derive 2 equations but got 4 unknowns....
fc1 = sqrt(kn(w/L)Io1)/(2*pi*C1)
fc2 = sqrt(kn(W/L)Io2)/(2*pi*C2)
where fc1 is 4250Hz and fc2 is 17000Hz. Unknown Io1, Io2, C1 and C2.
Can give me some advise on how to do it.... Thanks in advance.
I am attaching a schematic diagram of the circui
Analog Circuit Design :: 10-05-2006 00:04 :: Potomoto :: Replies: 6 :: Views: 1506
How do we derive the formulae for various resistances used in the filter ?
I referred many books, but all of them give only the formulae for resistances in terms of quality factor and center freq??
Electronic Elementary Questions :: 12-07-2006 01:34 :: Nischal :: Replies: 2 :: Views: 1187
Use ADS or Genesys for filter design
RF, Microwave, Antennas and Optics :: 03-02-2007 10:11 :: ADS_RFMW :: Replies: 2 :: Views: 717
I need to use a lag-lead filter. The configuration of this filter can be seen on page 8 of the following datasheet: (on the top right hand corner).
I need to work out the values for C1, C2 and R2 if the cut off frequency is 1kHz. What equations can i use? OR What would the values for C1, C2 and
Analog Circuit Design :: 03-16-2007 06:46 :: elec_eng :: Replies: 0 :: Views: 1210
First you should try to make a program using the equations given in
any filter book. If this does not work them try looking on Matlabs
"File Exchange page". You can find it here.
Digital communication :: 03-26-2007 12:47 :: Element_115 :: Replies: 2 :: Views: 2000
i want to design a PLL,now i have met with some problems.i'd like to use an active filter,but don't know how to caculate the filter's parameters.can u help me?thanks a lot!
Analog Circuit Design :: 05-28-2007 13:29 :: Amy Wu :: Replies: 3 :: Views: 619
I want to simulate a PLL and the loop filter parameters need to be calculated automatically according to bandwidth and phase margin. The loop filter is a 3rd order passive loop filter. The attached is a good tool to calculate the loop filter. But I need to do calculation in my program. So does anyone know the (...)
Analog Circuit Design :: 08-14-2007 02:21 :: hmsheng :: Replies: 2 :: Views: 3567
"Practical Analog and Digital filter Design" by Les Thede contains equations for determining filter order and Gains for the Butterworth and other filter types.
Analog Circuit Design :: 01-06-2008 17:35 :: Kral :: Replies: 1 :: Views: 1043
INTER DIGITAL SUSPENDED SUBSTRATE BAND PASS filter DESIGN CONCEPTS(EQATIONS ,PRACTICAL CONSIDARATIONS)
GIVE ONE EXAMPLE OF THE BPF IN TERM OF equations AND HOW TO SIMULATED IN ADS(PLEASE SEND ADS SIMULATED LAY OUT AND RESULTS)
BPF SPECIFICATIONS: 1) PASS BAND:5.4GHz-
RF, Microwave, Antennas and Optics :: 01-21-2008 11:59 :: ravisankar :: Replies: 2 :: Views: 978
hi, i want to design a bandpass filter with round rods can any body help me to by sending design equations completely.
thanks in advance
Linux Software :: 03-29-2008 00:51 :: mallelauma :: Replies: 0 :: Views: 865
i need design of interdigital filter with round rods. i have one paper from this site only but the equations for capacitor values are not there. can any body give me the whole design equations for this filter plz.
RF, Microwave, Antennas and Optics :: 03-29-2008 03:07 :: mallelauma :: Replies: 0 :: Views: 610
Attached are the requested documents on Combline filter design...
Design equations for Tapped Round Rod Combline and Interdigital Bandpass filters
RF, Microwave, Antennas and Optics :: 04-01-2008 01:45 :: Manjunatha_hv :: Replies: 2 :: Views: 1552
i want to design interdigital filter with microstrip withn design equations any 1 help me .and suggest any good book for the microwave filter design using microstrip or round rods.
thanks to all
RF, Microwave, Antennas and Optics :: 04-03-2008 07:03 :: mallelauma :: Replies: 3 :: Views: 2449
im sorry so much of matter is missed here , i want to know the relation between coupling band width and coupling coefficient in combline filter design which mentioned in thsis article i got this from the forum ift seems but i couldn,t understand how to calculate ke, cfe,cg,ze,zo values
and also i calculated the k(i.j) valu
RF, Microwave, Antennas and Optics :: 04-12-2008 00:14 :: mallelauma :: Replies: 1 :: Views: 613
Generally, you can tune the filter in the S parameter, otherwise you can use shorted_circuit tunning techque and reflected group delay tuning techqiue.
RF, Microwave, Antennas and Optics :: 05-19-2008 08:36 :: james cook :: Replies: 16 :: Views: 2219
RF, Microwave, Antennas and Optics :: 05-23-2008 07:27 :: ckshivaram :: Replies: 2 :: Views: 952
I want to know that Is IIR filter is always non causal. if not than please send me an example of IIR filter in difference equation that is causal.
Please think about
y(n) = y(n-1) + x(n-1) + 2*x(n)
Is the above system is causal or non causal?
Is the system is IIR or not ?
Digital Signal Processing :: 07-02-2008 09:36 :: bhq :: Replies: 3 :: Views: 2152
I am designing a 5 pole combline filter. The problem I have been facing is that whenever I simulate a combline filter of order more than 3, the S11 response always shows lesser no of resonances and hence getting the required bandwidth and ripple levels is very hard. I tried to use both peter martin's equations and also the eigen (...)
RF, Microwave, Antennas and Optics :: 08-15-2008 02:46 :: kashyapastron :: Replies: 4 :: Views: 760
Can any person tell me the definition of the Ladder filter?
Analog Circuit Design :: 10-08-2008 06:09 :: M.B. :: Replies: 3 :: Views: 998
I want design a charge pump pll. But the process (SOI CMOS) does't provide
resistor device. So , any one can give suggestion on the design of resistor-less filter and bias ckt of cp pll ?
Analog Circuit Design :: 06-09-2009 13:24 :: xihuwang :: Replies: 1 :: Views: 794
Put the notch stub at both ends of the filter whose freq is at 2nd harmonic of the filter
RF, Microwave, Antennas and Optics :: 07-08-2009 08:14 :: kspalla :: Replies: 3 :: Views: 740
what cut-off frequency of your filter do you want? fix the C value to something you can buy and then design for L. that is your first iteration.
i assume you are talking about 3-phase circuit. so be careful as there are 3 inductors and 3 capacitors.. but typical equations for cut-off frequency is considered as line-to-netural. your other pha
Power Electronics :: 11-21-2009 17:06 :: Mr.Cool :: Replies: 11 :: Views: 2375
The matrix equations of a kalman filter allow for multiple inputs. Each has its own "weighting" that the filter eventually solves. Get a good kalman filter book!
Mechanical Engineering and Design :: 09-14-2010 21:39 :: biff44 :: Replies: 2 :: Views: 1718
Thank you for the answer.
I don't use any output filter in order to keep bandwidth capability of the boost converter, tha's why I need to optimize the output ripple according to L & C values.
Power Electronics :: 02-08-2010 04:10 :: jayce3390 :: Replies: 4 :: Views: 3136
This is complex problem,
irst you need to freeze the specification, find the approach filter type and then order, then target for WLS for each finger.
RF, Microwave, Antennas and Optics :: 04-01-2010 06:48 :: kspalla :: Replies: 4 :: Views: 2320