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: 1856
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: 495
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: 404
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: 992
how to obtain discrete time state equations for kalman filter
Digital Signal Processing :: 04-16-2006 12:59 :: PMW :: Replies: 0 :: Views: 668
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: 1022
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: 425
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: 1748
is a free online waveguide filter designer.
RF, Microwave, Antennas and Optics :: 02-05-2003 14:04 :: flatulent :: Replies: 3 :: Views: 1414
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: 1073
what is CQ filter?
RF, Microwave, Antennas and Optics :: 02-18-2003 16:24 :: u_f_o :: Replies: 3 :: Views: 1371
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: 2427
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: 632
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: 839
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: 453
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: 803
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: 1302
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: 1329
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: 26467
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: 848
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: 950
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: 1262
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: 789
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: 614
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: 3660
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: 1480
Determine the (s-domain) transfer function of the desired filter.
Determine the (s-domain) transfer function of the circuit (active or passive) that you want to use.
Equate like powers of s in both transfer functions. You will have n simultaneous equations for an n-pole filter.
Electronic Elementary Questions :: 12-08-2006 16:07 :: Kral :: Replies: 2 :: Views: 1160
Use ADS or Genesys for filter design
RF, Microwave, Antennas and Optics :: 03-02-2007 10:11 :: ADS_RFMW :: Replies: 2 :: Views: 702
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: 1180
can anyone provide me with the code or implementation ideas for low pass filter of particular cut-off frequency and notch filter without using inbuilt functions on MATLAB ...
thanks in advance ...
Digital communication :: 03-26-2007 05:20 :: rmreddy :: Replies: 2 :: Views: 1943
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: 598
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: 3525
"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: 1007
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: 935
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: 830
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: 567
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: 1501
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: 2419
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: 598
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: 2168
hi to all
i have a doubt that, whether resonator length is the main factor for the filter tuning in interdigital filter, but it only depends on the frequency and wavelength , then by only tuning this length how can we adjust the all the factors related to filter?
i want o know more about this any suggested book for r
RF, Microwave, Antennas and Optics :: 05-23-2008 06:57 :: citizen :: Replies: 2 :: Views: 930
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: 2063
I can't read your file, but how distinct the VSWR ripples will be depends upon the amplitude response of your design. A Bessel response will only show one dip at centre frequency, but a 1dB Chebyshev will clearly show all 5.
If want a quick design tool then download Ansoft DesignerSV, the filter design wizard is easy to use and gives some good s
RF, Microwave, Antennas and Optics :: 08-15-2008 03:23 :: G4BCH :: Replies: 4 :: Views: 728
Can any person tell me the definition of the Ladder filter?
Analog Circuit Design :: 10-08-2008 06:09 :: M.B. :: Replies: 3 :: Views: 968
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: 776
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: 723
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: 2312
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: 1683
I once did a boost converter, from 12Vdc to about 50Vdc, but i don't remember the ecuations. Try searching for "switching mode power supply design guide".
I just wanted to say that in any case you want the output ripple to be as low as possible, for that you will ad an output filter. So the remaining ripple will not depend on the swit
Power Electronics :: 02-06-2010 05:47 :: nandrei :: Replies: 4 :: Views: 3099
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: 2249