Hi, all:
For my coursework, I have been given the task of designing a band-pass filter. The specification requires that:
1) The lower cut-off frequency should be approximately 200Hz.
2) The higher cut-off frequency should be approximately 4800Hz.
3) The filter design should be comprised of both a low and high pass filter. (Incorporated together.)
4) The design should be kept simple. (No OP-AMP filters etc haha)
Now, the way I can see it, there are only two main ways of doing this:
- Using LR filters
- Using CR filters
IMO, using CR filters for these frequencies will severely attenuate the frequencies within the selected range (as I found out from a computer generated bode plot)
SO I have therefore come up with this as a supposedly "better" alternative:
FINALLY, here come my questions:
1) Can the chosen values (in the above diagram) be improved?
2) Will the small value of the resistors in the above design be viewed negatively - as they may only be able to handle SMALL input voltages?
Any other comments, guidance appreciated.
Thank you in advance.
For my coursework, I have been given the task of designing a band-pass filter. The specification requires that:
1) The lower cut-off frequency should be approximately 200Hz.
2) The higher cut-off frequency should be approximately 4800Hz.
3) The filter design should be comprised of both a low and high pass filter. (Incorporated together.)
4) The design should be kept simple. (No OP-AMP filters etc haha)
Now, the way I can see it, there are only two main ways of doing this:
- Using LR filters
- Using CR filters
IMO, using CR filters for these frequencies will severely attenuate the frequencies within the selected range (as I found out from a computer generated bode plot)
SO I have therefore come up with this as a supposedly "better" alternative:
FINALLY, here come my questions:
1) Can the chosen values (in the above diagram) be improved?
2) Will the small value of the resistors in the above design be viewed negatively - as they may only be able to handle SMALL input voltages?
Any other comments, guidance appreciated.
Thank you in advance.