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Bandpass Filter Design(70Hz to 30kHz range)

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KP

KP

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I wanna design a bandpassfilter on a FR4 pcb 1.6mm
thickness.The range is between 70Hz and 30kHz.Cutoff frequency at 200Hz and 10kHz. Probably capacitor in nanofarad(nF) and microfarad(uF).
Could somebuddy advise me how to choose suitable type of capacitor for this pcb design?Thank you.

Regards
KP
 

THe type of PCB material will make no difference to circuit operation at frequencys up to about 10MHz.

To choose the type of an individual capactor you must know it's function in the circuit.
A supply smoothing capacitor can be a polarised type such as an electrolytic.

A decoupling capacitor can often be a wide tolerance type because it will not affet circuit operation if the capacitance is a bit different fromt he marked value.

A capacitor that affects the frequency response of your filter may need to be a close tolerance type.
 

you should use OP to construct a active bandpass filter,

the pcb may has negligible effect on your filter.

best regards




KP said:
I wanna design a bandpassfilter on a FR4 pcb 1.6mm
thickness.The range is between 70Hz and 30kHz.Cutoff frequency at 200Hz and 10kHz. Probably capacitor in nanofarad(nF) and microfarad(uF).
Could somebuddy advise me how to choose suitable type of capacitor for this pcb design?Thank you.

Regards
KP
Click to expand...
 

hi
I think for good filter response be away from the polar capacitors . that mean you need to work with ceramic or thin film capacitos as a function of you power any way I think thin film will work very will in this range of frequency
 

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