Hi all
Please excuse any etiquette mistakes - I have searched but not really found what I'm looking for.
I'm wanting to create separate HPF and LPF circuits for use with electric guitar. From the research I've done, I can't really work out the disadvantages of a passive filter, which looks like it'd be pretty damn simple. However, it looks like any existing guitar filter circuits tend to be active, so I'm hoping someone can start me off with a basic design idea for an active filter.
I'd like them to have the following characteristics:
- 1 Megohm input impedance
- 10k ohm output impedance
- Minimum 12db/octave rolloff (ideally 24db/octave)
- Variable cutoff frequency (using potentiometer) - the HPF should ideally be 20 hz to 300 hz, the LPF 20 khz down to 4 khz
- Ideally the output level (voltage) should match the input, or at least not be excessively higher or lower.
- Powered by 9v DC
If anybody could sketch a quick circuit for both, or point me towards something that would get me in the ballpark I'd be very grateful.
Thanks
Please excuse any etiquette mistakes - I have searched but not really found what I'm looking for.
I'm wanting to create separate HPF and LPF circuits for use with electric guitar. From the research I've done, I can't really work out the disadvantages of a passive filter, which looks like it'd be pretty damn simple. However, it looks like any existing guitar filter circuits tend to be active, so I'm hoping someone can start me off with a basic design idea for an active filter.
I'd like them to have the following characteristics:
- 1 Megohm input impedance
- 10k ohm output impedance
- Minimum 12db/octave rolloff (ideally 24db/octave)
- Variable cutoff frequency (using potentiometer) - the HPF should ideally be 20 hz to 300 hz, the LPF 20 khz down to 4 khz
- Ideally the output level (voltage) should match the input, or at least not be excessively higher or lower.
- Powered by 9v DC
If anybody could sketch a quick circuit for both, or point me towards something that would get me in the ballpark I'd be very grateful.
Thanks