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naveeng
Joined: 28 Sep 2006
Posts: 20
Helped: 2
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 10 May 2008 5:25 How to design an LPF... |
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dear frns...
i need to design an LPF with an input impedance of 150 ohm and output impedance of 50 ohm...
plzz...any one can describe me how to design or suggest any paper or article or text book ..so that i can get help from u....
thanks and regards....
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RFDave
Joined: 18 Feb 2004
Posts: 346
Helped: 45
Location: NE USA
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10 May 2008 14:06 Re: How to design an LPF... |
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Have you tried googling "low pass filter design"? There seem to be some useful pages there.
Dave
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10 May 2008 14:06 Ads |
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LvW
Joined: 07 May 2008
Posts: 1466
Helped: 242
Location: Germany
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10 May 2008 15:36 Re: How to design an LPF... |
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what about looking into a relevant textbook ?
You should be aware that there are at least 20 circuit alternatives for active low pass filters. Or do you refer to passive circuits ?
Do you know that filter order and approximation characteristics are also relevant ?
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FvM
Joined: 22 Jan 2008
Posts: 5160
Helped: 767
Location: Bochum, Germany
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10 May 2008 16:08 Re: How to design an LPF... |
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| You are apparently refering to a passive filter. If you want to use inductors and capacitances from a catalog with standard E6 or E12 values, simple filter characteristics (bessel, butterworth, chebyshev) are preferable. They are sufficient for many purposes anyway. But as said, you need a specification. Trial version of Nuhertz filter solutions could be used to calculate the filter, but a lot of other tools should be also available.
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