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85 Threads found on edaboard.com: **Filter Equations**

Normal Output voltage ripple formulae is
\Delta V = \frac{\Delta I}{8fC}
But many power supply design book calculate capacitor needed with respect to maximum output current. The result of these two equation will be very different. Please suggest how to calculate output capacitor **filter** for any forward converter.

Power Electronics :: 02-08-2017 09:36 :: sac1991 :: Replies: **3** :: Views: **281**

I realise that for maximum power transfer, the input and output impedance of **filter**s should match the impedance of whatever they're connected to (in this case 50 Ω in and out). My question is, should the PCB tracks between the Ls and Cs, that make up a complete **filter**, use track widths that equate to 50 Ω? My thought is that if you foll

RF, Microwave, Antennas and Optics :: 09-20-2016 07:17 :: HardwareChap :: Replies: **1** :: Views: **192**

You first have to determine what are the artifacts that are polluting your signal, and then specify the **filter** requirements. In Excel you could use the VBA to do that, but as Tony mentioned you'll need an external tool to synthesize the **equations**.

Digital Signal Processing :: 04-06-2016 16:45 :: andre_teprom :: Replies: **4** :: Views: **585**

Hi there,
i need some book or article for earning synthesizing **equations** or methods for designing a stripline band pass **filter** 1-2 GHz.
it is urgent,
can any one help me plz?:bang:

RF, Microwave, Antennas and Optics :: 09-11-2014 09:01 :: ehsan_faal :: Replies: **1** :: Views: **455**

Hi friends, I am reading a paper on frequency warping and I need to do a little manipulation of the z transform. Can somebody help me on how can I go about deriving **equations** 3 and 4 from **equations** 1 and 2 in the figure.
Thanks in advance
105906

Digital Signal Processing :: 05-31-2014 08:57 :: electronicengr :: Replies: **0** :: Views: **611**

A microstrip notch made by a thin L/4 line is not very consistent in production when try to reject a carrier, because small variations in the PCB process will change the notch frequency.
Meantime, a thin microstrip line is actually an inductor (see online for **equations**) and this can be helpful in microwave frequencies making a low pass **filter** just

RF, Microwave, Antennas and Optics :: 02-23-2014 16:40 :: vfone :: Replies: **1** :: Views: **796**

I am not sure if this answers your question:
Sinusoidal signals can be expressed by exponenetial functions like Vin=Vo*exp.
If such a signal is applied to a frequency-dependent network (**filter**, amplifier) the output will change in magnitude and phase like Vout=A*Vo*exp.
Thus, the gain is Vout/Vin=A*exp.

Mathematics and Physics :: 02-06-2014 12:03 :: LvW :: Replies: **3** :: Views: **655**

Hi all,,
What is the difference between kalman **filter**ing and extended kalman **filter**ing channel estimation...can nyone tel how they differ in their **equations**..i would also like to know the differences in formulating matlab codes for them...for sinusoidal wave as input, is an extended kalman **filter** must?
Thank (...)

Digital Signal Processing :: 05-15-2013 06:41 :: Lekshmi B S :: Replies: **0** :: Views: **809**

can anyone please tell me the difference between kalman **filter**ing and extended kalman **filter**ing channel estimation....i would mainly like to know the differences in formulating matlab codes for both.....and also about how they differ in their **equations**.....
for giving sinusoidal wave as input, should we use an extended kalman (...)

Digital communication :: 05-13-2013 09:28 :: Lekshmi B S :: Replies: **0** :: Views: **618**

My questions are am I in the correct path and what is the effect of the frequency scaling factor (FSF)?
The FSF is 1 for Butterworth but for Bessel and Chebyshev it has an effect. Why is that?
The **equations** for **filter** dimensioning are based on pole locations (pole frequency Fp and pole Q).
However, the user normall

Analog Circuit Design :: 05-13-2013 07:49 :: LvW :: Replies: **1** :: Views: **626**

i want to do channel estimation using kalman **filter**. this is the matlab code i formulated using the **equations**. the noise added is gaussian. but the problem is that i am getting a constant error instead of error getting reduced with the number of iterations. can anyone please help me to find the correction needed in this...
its urgent..if anyone ca

Digital communication :: 05-02-2013 05:14 :: Lekshmi B S :: Replies: **0** :: Views: **592**

I have this **filter**, i've tried many times to get the transfer function, but i always get it wrong...
Here are the **equations** i'm using:
(Vin-V1)/R1+(V2-V1)/R2+(V3-V1)/R2=0;
V1=R3Vout(R3+R4);
V2=-VoutR2*sc;
V3=-Vout/R2*sc;
if anyone could give me a hint of what am doin wrong, it would be great.

Elementary Electronic Questions :: 04-25-2013 09:51 :: JMAS :: Replies: **0** :: Views: **372**

Don't forget a very important fact, that in making higher order modulators, you need to consider coefficient scaling within the loop **filter** for stability. If using a single bit internal quantization, you will never match the calculated values by the commonly used **equations**! It only matches for first order. If you go to multi-bit, you will match

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-28-2013 08:30 :: jgk2004 :: Replies: **4** :: Views: **514**

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 05:55 :: gsomesh :: Replies: **2** :: Views: **758**

How?? Has anybody heard of this or done it before? If so please lead me to the resources or tell me how to do it. I know it's not usually done, but this is a very special case where I know the aliased frequency and the magnitude.
I also was suggested to use the mathematical **equations** directly but I am not sure which ones. If any one experienced

Digital Signal Processing :: 07-16-2012 22:24 :: EE112 :: Replies: **1** :: Views: **481**

I am designing a Band Pass **filter**.
I tried to swap the order in which the **filter**s( LP and HP) are used. and found out that I get two different result. If I calculate the transfer function of the band pass **filter** I shouldn?t see any difference. But in my case LP-HP band pass **filter** has more loss than HP-LP (...)

Analog Circuit Design :: 05-02-2012 23:18 :: code2zero :: Replies: **8** :: Views: **1027**

Hi all:
I have a very basic question about difference **equations**. I seem to be going in circles trying to find the answer online.
1. if someone asks you to obtain the difference equation of a low pass **filter** with cut of freq say 60Hz, how would one go about doing it? Once you get the difference equation you can write the software, but I just c

Digital Signal Processing :: 03-12-2012 05:22 :: dom045 :: Replies: **1** :: Views: **759**

Dear Jonny
Hi
Ic= c(dv/dt) and you can get the voltage : ic*dt=c*dv ...> dvc=(ic/c*dt) ...> vc = 1/c integral (ic dt) .
And at square wave and DC , we can say : Vc(t) = vs-(vs-v0)e^(-t/RC)
With top considerations you can analyze your **filter** , simply.
Best Wishes
Goldsmith
---------- Post added at 17:21 ---------

Elementary Electronic Questions :: 01-30-2012 13:51 :: goldsmith :: Replies: **11** :: Views: **1388**

Hello,
I am currently trying to convert a two-stage cascaded L-type **filter** into transmission lines. I have found a way to this problem, but I´m somehow not able to figure out how to use the **equations** to get the job done.
Link for the problem:
ImageShack? - Online Photo and Video Hosti

RF, Microwave, Antennas and Optics :: 01-17-2012 19:49 :: yxcvbnm1234567890 :: Replies: **0** :: Views: **564**

Hi, I am trying to design a microstrip complementary HPF (High Pass **filter**) for my diplexer design. I have already designed the LPF section for that diplexer in microstrip using Pozar's **equations**. But, I am getting problem to design HPF. I am using a series capacitor as a first component in my design as I have restriction to use a parallel componen

RF, Microwave, Antennas and Optics :: 11-10-2011 01:06 :: snali :: Replies: **0** :: Views: **797**

Hi, I am simulating a down-converter system in ADS. The schematic simulations allow to use the lowpass **filter**s, without no parasitic passband feature, which is not the fact. How can I set the parasitic passband feature of the low pass **filter**s in the ADS schematic, just use the if else **equations**? For example, a butterworth lowpass (...)

Electromagnetic Design and Simulation :: 10-10-2011 10:59 :: saulbit :: Replies: **0** :: Views: **775**

I am designing a receiver. In a traditional way, I use two mixers and three ampllifiers. The OIP3 of the amplifiers is +27dBm, and IIP3 of the mixers is about 18dBm. The simple structure of the system is something like the mixer->amplifier->**filter**->mixer->amplifier->amplifier->**filter**. The level of the mixers is about -30dBm. So the third order out

Analog Circuit Design :: 06-20-2011 02:48 :: saulbit :: Replies: **1** :: Views: **942**

Gd eve,
I am doing my B.Tech final year project on "ACOUSTIC ECHO CANCELLATION ALGORITHM TOLERABLE FOR DOUBLE TALK" here im having a code by using direct adapt **filter** but i need to submit the code using LMS **equations**... i have added a sine signal with a random noise ..but can't go further.. so, please anyone help me by providing me the code or e

Digital Signal Processing :: 03-18-2011 19:47 :: revanthkumarg :: Replies: **1** :: Views: **1584**

i mean genetic algorithm for(GA)
i need to goldberg book this book if i found i will good but this book is no available and i want form you this book.
plz help me in my resrch .
how can i deal with **equations** non-linear in genetic algorithm for design **filter** with no using pareto .
plz plz plz help me..

Heuristic methods, Machine Learning, AI, and Soft Computing :: 02-02-2011 07:41 :: kokor :: Replies: **0** :: Views: **1028**

hi everybody...
I have an assignment on the fabrication of interdigital **filter**.I studied **equations** for designing **filter**.But i could not understand how to calculate the number of elements to be used in interdigital **filter**.There is a equation to calculate n such as LA(dB)=10log10(1+\\epsilon (w'/w1')^(2n))..I have the (...)

RF, Microwave, Antennas and Optics :: 01-12-2011 17:12 :: P.kayalVIZHI :: Replies: **0** :: Views: **700**

Write your own **filter** function using the difference **equations** given NUM & DEN.

Digital Signal Processing :: 01-06-2011 23:28 :: RBB :: Replies: **4** :: Views: **623**

hello everyone i need the **equations** of first and sec derivative of Gaussian **filter** for peak detection of brain stem response signal ..
plz help me in this concern......

Digital Signal Processing :: 12-21-2010 07:26 :: jyothib86 :: Replies: **0** :: Views: **808**

hi guys
i have designed microstrip ring resonator **filter** and the result was in good agreement with the fabricated **filter** ... i need to synthesis the **equations** of the proposed **filter** so anyone has any idea helps
happy new year for everyone

Electromagnetic Design and Simulation :: 12-21-2010 06:06 :: sameh1985 :: Replies: **0** :: Views: **1064**

what's the cut off of you 3 rd order **filter**?
strobeperiod does not have anything to do with simulation accuracy. However, maxstep has. By decreasing maxstep, you are forcing the simulator to solve the **equations** more often (even though it might not be required because of lack of transitions).
In this case, you must first determine how much pulse

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-04-2010 03:14 :: amriths04 :: Replies: **5** :: Views: **1135**

While analyzing the current distribution using Agilent's ADS..for **filter** designed using micro-strip line...how to interpret it...
If any **equations** related to this analysis then let me know so that i can explore more on that....

RF, Microwave, Antennas and Optics :: 11-24-2010 12:42 :: sandesh564_123 :: Replies: **0** :: Views: **1163**

Dear all,
I want to ask a simple question:
Why high order active **filter** can violate Barkhausen's criteria?
For instance, if want to design a third-order low pass active **filter**, there will
be three integrators in the loop. In other words, the phase margin is easily less
than 0 degree.
When we design an active **filter**, we merely

Analog Circuit Design :: 11-12-2010 08:08 :: LvW :: Replies: **2** :: Views: **1030**

It is unclear what point the scope simulation plot is of. It appears to be related the MOSFET output chop voltage. It is definitely not a plot of coil current.
If you are looking for battery ripple current you are going to have to put in representative resistance of output **filter** cap and battery Rs resistance. You should also put in coil resi

Power Electronics :: 11-06-2010 16:04 :: RCinFLA :: Replies: **2** :: Views: **712**

Hello Sirs
I'd like to do following in MWO:
I have **filter** with switched C. C are switched by PIN DIODES.
Vector SW is vector for ON/OFF PIN Diodes. I have 4 diodes.
So it is possible to have 2^4 combinations = 16
SW={1,1,1,1} next SW={1,1,1,0}
So I'd like to define MATRIX of SW commbinations called for exmaple X :)
X=
1,1,1,1

Software Problems, Hints and Reviews :: 10-14-2010 08:51 :: deepi9or :: Replies: **2** :: Views: **1242**

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 :: 09-15-2010 01:39 :: biff44 :: Replies: **2** :: Views: **1969**

Hi everyone, I'm a master student of Government Technological University(Thanlyin) , Yangon, Myanmar. I want to ask **equations** about my thesis. My thesis title is "Design and Implementation of DSP based Active and Passive **filter** synthesis Using Matlab". So , How do my thesis start ? Please give me any ideas. Thanks for all.[

Analog Circuit Design :: 08-16-2010 19:16 :: LvW :: Replies: **3** :: Views: **954**

In **filter** synthesis block, there is a "sensitivity analysis" tab, if use this tab, ads will give you the sensivity or in otherwords the statistical **filter** response causing by component variations.

RF, Microwave, Antennas and Optics :: 07-05-2010 17:35 :: BigBoss :: Replies: **3** :: Views: **1546**

I would say you really need to buffer the piezo signals first. A simple opamp buffer (or even an emitter follower circuit ) is all you need. Then you could use the passive **filter**s. Mind you, if you are going to put an opamp in there, you may as well make it a non-inverting, high impedance input active **filter**! I would suggest a simple 2 pole fil

Elementary Electronic Questions :: 06-07-2010 06:59 :: keith1200rs :: Replies: **6** :: Views: **3263**

I am trying to build one SMPS with EMI **filter**.
Can anybody give me the design **equations** and design criterion s of the **filter** ?

Analog Circuit Design :: 05-16-2010 04:50 :: vinodquilon :: Replies: **1** :: Views: **2245**

Can anybody post close form design **equations** for elliptic **filter** here. Thank you.

RF, Microwave, Antennas and Optics :: 04-19-2010 06:46 :: g86 :: Replies: **1** :: Views: **1093**

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 10:48 :: kspalla :: Replies: **4** :: Views: **3043**

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 20:22 :: infinite_gbps :: Replies: **1** :: Views: **587**

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 09:10 :: jayce3390 :: Replies: **4** :: Views: **3547**

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 22:06 :: Mr.Cool :: Replies: **11** :: Views: **2907**

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 12:14 :: kspalla :: Replies: **3** :: Views: **958**

can anybody give me the complete procedure to design the microstrip square open loop resonator BPF using ADS with required **equations**.

RF, Microwave, Antennas and Optics :: 06-30-2009 06:40 :: umair67 :: Replies: **0** :: Views: **817**

how to calculate the parameters of square open loop resonator.plz specify the **equations**.

RF, Microwave, Antennas and Optics :: 06-29-2009 06:48 :: umair67 :: Replies: **0** :: Views: **644**

hi to all,
i have the design **equations** of the inter digital **filter** , how can use these **equations** for the combline **filter** design , is there any **equations** are modified for the combline **filter**. if both **filter**s can use the same **equations**, plz tell me (...)

RF, Microwave, Antennas and Optics :: 04-21-2008 05:19 :: mallelauma :: Replies: **0** :: Views: **624**

Hi Mouzid, please do a google search for "Fuding Ge pll thesis"
There you will get this thesis. Yes the loop **filter** needs to be designed so that the PLL locks to the input frequencies.You will find the standard design **equations** in any design book.
Amarnath

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-18-2008 11:26 :: amarnath :: Replies: **5** :: Views: **1158**

hi
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 04:14 :: mallelauma :: Replies: **1** :: Views: **785**

Hello mallelauma,
Attached are the requested documents on Combline **filter** design...
Design **equations** for Tapped Round Rod Combline and Interdigital Bandpass **filter**s
---manju---

RF, Microwave, Antennas and Optics :: 04-01-2008 05:45 :: Manjunatha_hv :: Replies: **2** :: Views: **1894**

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