Search results

Search Forums New Posts
  1. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Sound!
  2. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Hello, so about the stages, does it matter which order the filters go in?
  3. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    any way, bed time cya's
  4. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    lol now you tell me after tabulating variables for 2 and a half hours later oh well no harm done, and I now have the capacitor values and resistors aha so back to an earlier question does it matter the order of the stages because often it doesn't say stage A stage B stage C etc also I have the...
  5. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I set all of the searches using the method passband = centre/4 and then stopband 2 x centre
  6. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    So I drew up a table there are: 19 x AD8657 , 5 quad-op-amps of the same spec in dip package two sets of two, five sets of three 3 x ADA4096-2 , 1 quad-op-amp chip again with the same specs one quad 3 x LT1637 , 1 quad-op-amp chip again with the same specs one quad 5 x...
  7. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok thanks so like this!!;
  8. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I don't understand the following! This is the range of frequencies you want to let through. Define this region by entering the circuit gain at the passband frequencies, the frequency cutoff, and the attenuation you prefer at this frequency cutoff. Attenuation is relative to the gain entered...
  9. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok I see the left numbers shift when altering gain, and also the 8 hz is the width of the passband in this case (4Hz either side of the centre) as the frequency gets higher does this number need to increase? so how do you set stopband properly? (I can adjust the centre frequency) like what are...
  10. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok, does the -dB in the passband control the filter to pass frequency with volume of the signal?
  11. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    I think the stopband and the bandpass need to be the same ratio as the 45Hz (and oh yeah I'm starting at 45Hz now because thats where I start to hear)
  12. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

  13. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ah just as I thought I had it hufff I'm having trouble, dont suppose you can help me with the existing 15 filters I managed to do up to 720Hz the filter used in all of them were the AD8657 which I think I can swap out for the TL074 quad
  14. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    ok I see now, now for some paper work!
  15. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    other filters? I was going to go with the TL074, I need dip package!
  16. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok cool can you tell me the value of Rx and tell me if those caps in the link will be good enough (green) please getting parts ordered at 4 brittish time Mylar Capacitors Polyester Film 100V 5%
  17. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    can I use the op-amps in the filter wizard to increase gain ratio, (output to input ratio)
  18. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    would these in 100nF suffice...
  19. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    are the capacitors tantalum and what is the working voltage for them? apart from the C101M 10uF electrolytic. I am now ordering the parts so I need to know as soon as possible
  20. Maglatron

    Sallen Key Low Pass Filter, bandpass filter

    Ok thats good to know that 2.4 is quite high, there is a pre-amp, which is an amp, from the mic to the filters -no gain in the filters though. By rectifier do you mean the envelope detector? Rx does not have a value at the moment what should it be set at? Ok another stage, amplifier, I'm looking...
Top