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Q&A Band pass filter given cutoff frequency and bandwidth

I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz. $$ \frac{1}{\sqrt{LC}} = 10001 \rightarrow LC = 1/100020001 sec^{2}$$ $$ \frac{R}{L} = 2...

2 answers  ·  posted 2y ago by MissMulan‭  ·  edited 1y ago by Lorenzo Donati‭

#5: Post edited by user avatar Lorenzo Donati‭ · 2023-08-08T20:04:58Z (over 1 year ago)
Retagged.
#4: Post edited by user avatar MissMulan‭ · 2022-07-15T19:36:35Z (over 2 years ago)
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • ![Image alt text](https://electrical.codidact.com/uploads/EeXwmhPNCDhbxSEMdna1xZDW)
  • $$ \frac{1}{\sqrt{LC}} = 10001 ightarrow LC = 1/100020001$$
  • $$ \frac{R}{L} = 2$$
  • $$ \frac{1}{RC} = 2$$
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • ![Image alt text](https://electrical.codidact.com/uploads/EeXwmhPNCDhbxSEMdna1xZDW)
  • $$ \frac{1}{\sqrt{LC}} = 10001 ightarrow LC = 1/100020001 sec^{2}$$
  • $$ \frac{R}{L} = 2Hz$$
  • $$ \frac{1}{RC} = 2Hz$$
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
#3: Post edited by user avatar MissMulan‭ · 2022-07-15T18:09:26Z (over 2 years ago)
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • ![Image alt text](https://electrical.codidact.com/uploads/EeXwmhPNCDhbxSEMdna1xZDW)
  • $$ \frac{1}{\sqrt{LC}} = 10001 \rightarrow LC = 1/100020001$$
  • $$ \frac{R}{L} = 2$$
  • $$ \frac{1}{RC} = 2$$
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
#2: Post edited by user avatar Olin Lathrop‭ · 2022-07-15T11:07:41Z (over 2 years ago)
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • ![](https://electrical.codidact.com/uploads/CG98MhTFaPbyMCp94sFe3D3p)
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
  • I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.
  • Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)
  • it says it doesnt have any solutions.What am I doing wrong?
#1: Initial revision by user avatar MissMulan‭ · 2022-07-14T23:15:22Z (over 2 years ago)
Band pass filter given cutoff frequency and bandwidth
I have decided to try design a band-pass filter with a cut-off frequency of 10kHz and bandwidth of 2 Hz.

![](https://electrical.codidact.com/uploads/CG98MhTFaPbyMCp94sFe3D3p)

Here is what I have done but if I [plug the values to WolphramAlpha](https://www.wolframalpha.com/input?i=systems+of+equations+calculator&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation1%22%7D+-%3E%22x*y+%3D+1%2F100020001%22&assumption=%22FSelect%22+-%3E+%7B%7B%22SolveSystemOf3EquationsCalculator%22%7D%7D&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation2%22%7D+-%3E%22z%2Fy+%3D+2%22&assumption=%7B%22F%22%2C+%22SolveSystemOf3EquationsCalculator%22%2C+%22equation3%22%7D+-%3E%221%2F%28z*x%29+%3D+2%22)

it says it doesnt have any solutions.What am I doing wrong?