Low Pass filter

[gaurav rajput]

Dear Forum Members,

I have question and i expect the forum members to respond to it with appropriate information…

Can someone please explain On Which Factors Cut Off Frequency Of Rectangular Low Pass Filter Depends ?

[gaurav rajput]

Hope to see responses soon..

Thanking in anticipation..

[Manoj Kumar]

Hi all,

Well it basically depends upon the application.. In general, the cut-off frequency of any low-pass filter depends on 2 parameters: internal resistance and its capacitance.. If you consider the case of Bessel filter, the transfer function depends on two factors: insertion loss and order parameter of a normalizing constant.. Hope it helps..

Regards

[jyoti raina]

hi gaurav sir..
i agree with manoj sir..the cut-off frequency of any low-pass filter depends on 2 parameters: internal resistance and its capacitance.. If you consider the case of Bessel filter, the transfer function depends on two factors: insertion loss and order parameter of a normalizing constant..
it should help you..
with regards
jyoti raina

[gaurav rajput]

Hi Manoj,

Thanks for the response…

Regards

[FAYIQA NAQSHBANDI]

HI GAURAV..

I agree with manoj that the cut-off frequency of any low-pass filter depends on internal resistance and its capacitance…

Regards

[Manoj Kumar]

Hi Gaurav,

You are welcome… Hope you got the desired information..

Regards

[gaurav rajput]

Hi Manoj,

Well indeed i got some idea…

Regards

[shafeen al yasin]

Hi Gaurav,
I agree with manoj that cut-off frequency of any low-pass filter depends on 2 parameters: internal resistance and its capacitance.

Regards
Shafeen

[Manoj Kumar]

Hi Gaurav,

Glad to know you got some information on the forum..

Regards

[Ubaid Bhat]

hi all…
i really appreciate the efforts put by manoj to solve the querey…
best regards

[jyoti raina]

hi all..
thanks for sharing the info..
regards
jyoti

[gaurav rajput]

hi all,

Thanks for your responses.. Really apreciate your efforts… Thanks optiwave Forum… Cheers

Regards

[jyoti raina]

you are welcome gaurav sir..it indeed is helpful..
all the best

[Manoj Kumar]

Hi Gaurav,

You are welcome.. And yes thanks to optiwave forum…

Regards

[deepak jha]

Hi Gaurav,

I agree with manoj sir…the cut-off frequency of any low-pass filter depends on 2 parameters: internal resistance and its capacitance.. Hope you got the answer..

Regards

[Remo De Suza]

Hello Gaurav.
As far as your query is concerned i would like you to go through the link. I has been already discussed there. Hope it helps you to some extent.

Regards
Remo De’Suza

[Domail Singh]

Hi Remo
The link you have provided is very helpful. Thank you.

With Regards
Domai

[Remo De Suza]

Sorry this is the link

FILTER

Regards
Remo

[Ankita Sharma]

Hi Remo,

Thanks for the information…

Regards
Ankita

[Remo De Suza]

hi Ankita.
You are welcome. Cheers

Regards
Remo

[Rajguru M. Mohan]

Hi Gurav,
First i want to discuss about the cutoff frequency of filter.
A cutoff frequency, also called corner frequency, or break frequency is a boundary in a system’s frequency response at which energy flowing through the system begins to be reduced rather than passing through.
Cutoff frequency is most important parameter in case of filter.
The cutoff frequency of a low pass filter:
Cut-off frequency, Fc= 1/2πRC, so in this case it depends upon resistance,R and capacitance,C.
The product of the resistance and capacitance (R×C) is the time constant (τ); it is inversely proportional to the cutoff frequency fc,
, in the case of the Chebyshev filter it is usual to define the cutoff frequency as the point after the last peak in the frequency response at which the level has fallen to the design value of the passband ripple.

In this case, the filter has a passband gain of -R2/R1 and varies with it.

Hence, cutoff frequency depends upon various parametres like resistance, capacitance, order of filter, time constant and others.

Hope this will help you.

[Rajguru M. Mohan]

For more information on Factors which affect Cut Off Frequency Of Rectangular Low Pass Filter.
I think rectangular Low pass filter is ideal low pass filter or sinc filter, which removes all frequency components above a given cutoff frequency, without affecting lower frequencies, and it has linear phase response. The impulse response of this filter is a sinc function in the time domain, and its frequency response is a rectangular function.
http://www.labbookpages.co.uk/audio/firWindowing.html
http://www.rfwireless-world.com/source-code/MATLAB/FIR-Low-pass-High-pass-filter-rectangular-window-matlab-code.html
http://www.mathworks.com/matlabcentral/fileexchange/46811-two-dimensional-hi-pass-and-low-pass-rectangular-image-filter
https://www.ee.iitb.ac.in/~esgroup/es_mtech02_sem/es02_sem_rep_arojit.pdf

When we know how to design Rectangular Low Pass Filter, we will understand the factors which affect Cut Off Frequency of it.

Regards,
Rajguru

[Domail Singh]

Hi Rajguru
I agree with oyu. The links you have provided are also very apt. I hope these help gaurav

Regards
Domail

[nagesh kuknoor]

Hello Gaurav,
I agree with Rajguru that A cutoff frequency, also called corner frequency, or break frequency is a boundary in a system’s frequency response at which energy flowing through the system begins to be reduced rather than passing through. I hope this should help you.

Regards

[Remo De Suza]

Hi All,

I think very valid information being shared by all. This should help Gaurav.
Regards
Remo

[Ankita Sharma]

Hi Rajguru,

Thanks for the information… I really appreciate your valuable efforts and time…

Regards
Ankita

[Manoj Kumar]

Hi Rajguru,

Very valuable and informative description you have provided..

Regards

[deepak jha]

Hi all,

A very valuable information provided by all the members of the forum…

Regards

[Rajguru M. Mohan]

Thank you Nagesh, Manoj, ankita
For your appreciation and agreement on my points and comments.
The above discussed factors on which cutoff frequency depends are important.
In addition to these there are many factors on which cut-off frequency depend.
It depends upon type and order of filter and also on whether it is analog or digital type.
Or it is designed using op-amp or simple resistance and capacitance.

Regards,Rajguru

[Domail Singh]

Hi Rajguru
Thank you for sharing the information. It shall be very important in this regard. Hopefully it is beneficial for all.

Regards
Domail

[Rahul Tiwari]

Hi Domail,

I agree with you that the information on this discussed topic shall be beneficial for all…

Regards
Rahul Tiwari

[Rahul Tiwari]

Hi Rajguru,

Thanks for the links.. Your efforts are truly worth appreciating…

Regards

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