(Solved): We want to design an active Butterworth bandpass filter by connecting a highpass Butterworth circui ...

We want to design an active Butterworth bandpass filter by connecting a highpass Butterworth circuit in series with a lowpass Butterworth circuit. The cutoff frequencies should be at \( 6 \mathrm{kHz} \) and \( 10 \mathrm{kHz} \), with passband gain \( =10 \), which corresponds to \( 20 \mathrm{~dB} \). The gain should be \( -60 \mathrm{~dB} \) at \( 60 \mathrm{~Hz} \) and \( -28 \mathrm{~dB} \) at \( 40 \mathrm{kHz} \), or better. Determine the approximate filter order for each stage of the filter. 2nd-order highpass in series with 4th-order lowpass 1st-order highpass in series with 3rd-order lowpass 4th-order highpass in series with 3rd-order lowpass 4th-order highpass in series with 2nd-order lowpass 3rd-order highpass in series with 2nd-order lowpass