146 Threads found on edaboard.com: Filter Equations
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RF, Microwave, Antennas and Optics :: 17.09.2001 07:22 :: Robin Hood :: Replies: 0 :: Views: 1846
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: 475
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 :: 25.01.2003 14:07 :: femtoman :: Replies: 2 :: Views: 1721
is a free online waveguide filter designer.
RF, Microwave, Antennas and Optics :: 05.02.2003 14:04 :: flatulent :: Replies: 3 :: Views: 1399
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 :: 17.02.2003 08:03 :: tungchang :: Replies: 0 :: Views: 1056
what is CQ filter?
RF, Microwave, Antennas and Optics :: 18.02.2003 16:24 :: u_f_o :: Replies: 3 :: Views: 1363
I have a RFIC for handphone. There is a PLL filter exteral to chip. how
can i caculate this filter , such as bandwidth , etc. Is there some reference
for it. THKS in advance.
RF, Microwave, Antennas and Optics :: 02.07.2003 19:58 :: brian39 :: Replies: 11 :: Views: 2442
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 :: 04.09.2004 12:21 :: mami_hacky :: Replies: 5 :: Views: 2410
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 :: 03.11.2004 14:05 :: sandruska :: Replies: 2 :: Views: 625
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 :: 23.11.2004 08:33 :: neo :: Replies: 1 :: Views: 818
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 :: 21.02.2005 14:09 :: rf100 :: Replies: 0 :: Views: 444
Most books about filters or about transmission lines written prior to 1960 will have this as one of the chapters. Also, general handbooks on radio in this time period will have information.
If you have any specific questions I can help.
Electronic Elementary Questions :: 13.03.2005 14:12 :: flatulent :: Replies: 9 :: Views: 2952
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 :: 28.03.2005 16:57 :: flatulent :: Replies: 3 :: Views: 986
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 :: 18.05.2005 16:15 :: RFCMOS :: Replies: 3 :: Views: 790
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 :: 22.06.2005 18:35 :: me2please :: Replies: 2 :: Views: 1296
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 :: 27.06.2005 07:00 :: Ultimâ :: Replies: 2 :: Views: 1314
I'm doing Fingerprint Recognition System and I plan to use Gabor filter to enhance the fingerprint image. Do anyone have idea on this? Is Gabor filter effective in fingerprint image enhancement? What other enhancement methods I can use? Can I have any resources about Gabor filter theory and its Matlab Files? I'm doing this using (...)
Digital Signal Processing :: 12.09.2005 23:31 :: leekk8 :: Replies: 33 :: Views: 26342
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 :: 20.10.2005 17:34 :: Kral :: Replies: 0 :: Views: 841
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 :: 03.11.2005 20:04 :: Highlander-SP :: Replies: 5 :: Views: 940
what governs the dimensions of the aperatures between the resonators in a combline and where are the equations
RF, Microwave, Antennas and Optics :: 30.11.2005 17:42 :: wicked :: Replies: 0 :: Views: 516
Hello, information here could be helpful:
Calculation gives R~10KOHm and C~several nF
These are reasonable for board level implementation.
Analog Circuit Design :: 09.03.2006 09:27 :: jcpu :: Replies: 6 :: Views: 1229
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 :: 26.03.2006 00:58 :: scdoro :: Replies: 5 :: Views: 777
how to obtain discrete time state equations for kalman filter
Digital Signal Processing :: 16.04.2006 12:59 :: PMW :: Replies: 0 :: Views: 657
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 :: 14.05.2006 10:30 :: neoflash :: Replies: 1 :: Views: 605
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 :: 10.07.2006 06:35 :: leofy :: Replies: 2 :: Views: 3595
i have down the sourcecode of a digital pll,which is a second order pll with a pi loop filter, but ,there are some puzzle
Kp = ;
Ki = ;
d_phi_1 = 1/20;
n_data = 100;
Kp = ;
Ki = [(4*t
Digital communication :: 18.09.2006 11:16 :: mydreamhouse :: Replies: 0 :: Views: 687
All analog continious time filters have a transfert function that can be written as N(s)/D(s)
where N(s) the numerator is a polynome of degree n
D(s) the denominator is a polynome of degree p
s the laplace variable
and real filter have p > or = n
in reality a fiter is defined by a differential equation betweet input and output ( due to kirsch
Analog Circuit Design :: 26.09.2006 00:55 :: timo67 :: Replies: 7 :: Views: 2101
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 :: 05.10.2006 00:04 :: Potomoto :: Replies: 6 :: Views: 1467
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 :: 07.12.2006 01:34 :: Nischal :: Replies: 2 :: Views: 1147
hi guys I designed a bandpass filter with a new type o capacitive coupling for my project. The problem is how do I associate the filter response which I got with the common filter response types such as Butterworth, Chebyshev and Gaussian? How do I determine the type of my filter's response? What are the characteristics of (...)
RF, Microwave, Antennas and Optics :: 01.03.2007 11:37 :: prabu_9 :: Replies: 2 :: Views: 691
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 :: 16.03.2007 06:46 :: elec_eng :: Replies: 0 :: Views: 1161
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 :: 22.03.2007 06:51 :: deepa :: Replies: 2 :: Views: 997
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 :: 26.03.2007 12:47 :: Element_115 :: Replies: 2 :: Views: 1922
one of analog filter technic is state equation that can be implemented using opamp, but you must transform tour equation into state space equation i think
Analog IC Design and Layout :: 24.04.2007 04:59 :: e_eja :: Replies: 15 :: Views: 8075
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 :: 28.05.2007 13:29 :: Amy Wu :: Replies: 3 :: Views: 593
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 :: 14.08.2007 02:21 :: hmsheng :: Replies: 2 :: Views: 3509
"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 :: 06.01.2008 17:35 :: Kral :: Replies: 1 :: Views: 993
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 :: 21.01.2008 11:59 :: ravisankar :: Replies: 2 :: Views: 907
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 :: 29.03.2008 00:51 :: mallelauma :: Replies: 0 :: Views: 805
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 :: 29.03.2008 03:07 :: mallelauma :: Replies: 0 :: Views: 534
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 :: 01.04.2008 01:45 :: Manjunatha_hv :: Replies: 2 :: Views: 1470
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 :: 03.04.2008 07:03 :: mallelauma :: Replies: 3 :: Views: 2401
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 :: 12.04.2008 00:14 :: mallelauma :: Replies: 1 :: Views: 594
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 :: 19.05.2008 08:36 :: james cook :: Replies: 16 :: Views: 2149
RF, Microwave, Antennas and Optics :: 23.05.2008 07:27 :: ckshivaram :: Replies: 2 :: Views: 909
this is a causal system as y(n) only relies on it's past values y(n-1) and x's present and past values...transfer function is
y(n) = y(n-1) +2*x(n) + x(n-1)
Y(z) = Y(z)*z^-1 + 2*X(z) + X(z)*z^-1
H(z) = Y(z)/X(z) = (2+z^-1)/(1-z^-1)
=> 1st order low-pass filter..
Digital Signal Processing :: 04.07.2008 11:19 :: nalino :: Replies: 3 :: Views: 2018
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 :: 15.08.2008 02:46 :: kashyapastron :: Replies: 4 :: Views: 723
Can any person tell me the definition of the Ladder filter?
Analog Circuit Design :: 08.10.2008 06:09 :: M.B. :: Replies: 3 :: Views: 954
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 :: 09.06.2009 13:24 :: xihuwang :: Replies: 1 :: Views: 770
how to calculate the parameters of square open loop resonator.plz specify the equations.
RF, Microwave, Antennas and Optics :: 29.06.2009 02:48 :: umair67 :: Replies: 0 :: Views: 494