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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: **604**

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)
It's not the actual **filter** in- and output impedance but its designed or nominal impedance.
The design **equations** of a lumped **filter** don't assume transmission line segments inside the (...)

RF, Microwave, Antennas and Optics :: 09-20-2016 08:14 :: FvM :: Replies: **1** :: Views: **283**

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: **963**

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: **573**

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: **721**

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: **909**

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: **824**

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: **1146**

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: **730**

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: **759**

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: **708**

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: **426**

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: **605**

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: **807**

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: **566**

In both cases, the second **filter** loads the output of the first **filter**, changing it's characteristics. To minimize that effect, the impedances of the second **filter** should be much higher than the first **filter**. Your high-low **filter** gets that right (1K>>200 Ohms). To improve the low-high **filter**, (...)

Analog Circuit Design :: 05-02-2012 23:54 :: godfreyl :: Replies: **8** :: Views: **1314**

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: **820**

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: **1578**

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: **631**

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: **876**

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