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band-pass filter formed by the low-pass and high pass filter

2015-01-28 15:35  
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band-pass filter formed by the low-pass and high pass filters in series circuit
Band-pass filter is used to allow -3dB cutoff frequency with the low end and the high end. The frequency out of this range is eliminated. A simple way to get band-pass frequency’s response is to design a band-pass filter formed by the low-pass and high pass filters in series (as shown). And the cutoff frequency of HPF is designed to be equal to the cutoff frequency on the low end of the band-pass filter. Component values are calculated by the separate parts respectively.