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# Chebyshev And Filter

59 Threads found on edaboard.com: Chebyshev And Filter

## Calculating Resistance/Capacitance values from measured/simulated S-parameters

Hello! I designed a 2nd order bandpass chebyshev filter in HFSS. I fabricated the sample and measured the s-parameters. Its a two port network and it should have R1, R2, C1 and C2. I want calculate transient response of this filter and also the transfer (...)

## How to obtain component values for Chebyshev from the formula?

Does anyone have some resources or mind explaining to me how we can synthesize a chebyshev filter from the formulas specifically, and not from tables? Specifically, I did the long form calculations starting with minimum number of poles and so forth, however, when I get to Gvalues G1, Gn I get complex numbers of which I am (...)

## Filter synthesis using Butterworth or Chebyshev

When a filter is designed, how does one choose whether to compare it to chebyshev or butterworth prototype element values for coupling and Q determination? Some papers mention Butterworth element values to determine Q and coupling, while others use chebyshev.

## desgin for broadband amplifier (feedback and matching network)

hello everyone , I am trying to make a broad band amplifier design with a feed back and matching network (chebyshev filter) order 3 . what transistor that I use for a very good band? i realized a band , and gain 11db with transistor N32484AA I want a (...)

## Chebyshev v Butterworth Filter Design

In parts A and B we design a 9th order Chebvshev filter. However, I'm stuck with part C. Can you confirm/disprove my method as being correct steps in solving the problem please? 1. Already determined is that we require a 9th order system. So we evaluate the chebyshev polynomial up to this order. 2. It is required to look at the (...)

## Minimizing Cost Function using gradient method on Coupling matrix. RF filter.

Hi, I've been following approaches by Atia and Cameron to construct a Coupling matrix for a chebyshev filter. I'm now trying to use Amari's approach to optimize the Coupling matrix by minimizing the Cost Function using his Gradient approach. Can someone send me a paper or Matlab code that goes about step-by-step how to construct the (...)

## Ripples on the skirt of edge coupled filter at 6.2GHz

Hi all, I am trying to design a third order chebyshev edge coupled bandpass filter. The center frequency of the filter is 6.2 GHz with a 10% fractional bandwidth.I manufactured the filter and measured it with network analyzer.The passband is fine. But the (...)

## TLIN and MIM-Capacitor Characterization using Chebyshev Filter

Hello Guys, I need your help. I have created lumped-element models for single MIM-Capacitors and for micros trip transmission lines. I also got three 3rd order chebyshev low passes, built of MIM-Capacitors and tlines. I want to use these filters to do any characterization about my MIM-Capacitors and (...)

## need for a low pass filter with cutoff frequency around 10mhz

Hi all As I said I need a lowpass filter with cutoff frequency around 10Mhz, the most important thing i need is that the filter response in transition region is linear as much as possible,and it decrease monotonically because I use the filter In this region and it is important that (...)

## Chebyshev filter design Problem

-I have design a chebyshev filter.With The following specification. pass band 0-2khz pass band ripple=0.5dB sampling frequency 60khz and the transfer function given which is : H(s)=1.5161/(s^2+1.4526s+1.5161) -When I have done the design by hand I done I got (bi-linear ) (...)

## how can we find the amount of capacitors for the third order chebyshev Gm-C filter?

At first, you need VALUES for the 3 capacitors, correct? (not the "amount"). Furthermore, if you compare the second part of the transfer function (second order denominator) with the GENERAL 2nd order lowpass transfer function you get the following relations: wp^2=gm1*gm2/C2*C3 wp/Qp=gm2/C3 wp: pole frequency of complex pole pair, Qp=corresp

## Having Trouble With Designing IIR Filter on Frequency Transformation

Hello all, As written in title, I am having trouble with frequency transformation. There are three problems I am encountering right now. (1) Over-specification band pass filter I designed a 4th order chebyshev low pass filter which does satisfy given specification, in which - pass band edge (...)

## chebyshev filter -3db point

hello I would like to create a bandpass filter in the range 7-15 kHz in which the points at 5 and 18 kHz are attenuated of 3dB, with 0.1dB ripple. Now as for the butterworth answer i can easily carry out the calculation, but I can not figure out how to find the -3db points in the case of the chebyshev response. Could you (...)

## Low pass filter (LC) design

The filter specification is incomplete without a source and load impedance specification. For 50 ohm source and load impedance, the said filter corresponds to chebyshev I with about 350 kHz cut-off and 1.5 dB passband ripple. If you have different source (...)

## help with IIR filter(low-pass filter with impulse invariance and ellipsoid )

here is the problem: i use impulse invariance transform to design low-pass filter, butterworth,chebyshev1 can perfectly achieve the requirements,but ellipsoid and chebyshev 2 can't achieve the Rs(Stopband attenuation) and here is my code and figure： Fs=400 (...)

## Sallen-Key LPF frequency scaling factor

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 (...)

## HFSS filter design: Unable to achieve tuning for the filter

I tried to design an edge coupled microstrip chebyshev BPF at 5.81 GHz. Specifications: Bandwidth: 150 MHz Order=5 Substrate Permittivity: 3.2 Substrate Height: 1.58 mm Cover Height: 30 mm Ripple: 0.01 dB The dimensions of the strips were obtained from Ansoft Designer SV as fpllows: w1=1.72mm s1=1.27mm p1=8.11mm w2=1.87mm s2=4.78mm

## Designing a chebyshev bandpass filter

Hi, I want to design a chebyshev bandpass filter of order 3, centre frequency of 10khz and bandwidth of 1khz, I'm also taking a band pass ripple of 1dB. Please I really need help on how to go about the calculations involved in the design (e.g filter transfer function) (...)

## chebyshev filter exercise sample

The most straightforward way to design a bandpass filter is to first design a lowpass filter and then perform a lowpass to bandpass transformation. In your case, the bandwidth would be 455KHz, the bandpass attnuation is 1dB. The stopband attenuation is 40 (...)

## cut off frequency of chebyshev type II high pass filter

hello everyone!!! I am designing the type II chebyshev high pass filter. I have the transfer function of the filter(or the poles and zeros) . Can anyone tell me how to get the cut off frequncyf this filter?? I suppose, you need the 3dB-frequency, right? If you have all the poles and zeros, (...)