Driving 3 filters from 1 opamp

Discussion in 'The Projects Forum' started by Mark_varney, Feb 20, 2015.

  1. Mark_varney

    Thread Starter New Member

    Dec 1, 2013
    6
    0
    I have an Instrumentation amplifier feeding into a 1 op amp 60Hz notch filter. The output of notch filter is feeding 3 bandpass multi feedback filters ( 4th order, 2 opamp each). Do i need to put any thing between the output of the notch filter and the 3 filters or can i connect all 3 to the output of the notch filter?

    For another circuit i have a instrumentation amplifier that needs to feed a comparator,ADCand 50 Ohm line driver, what should be between the output of the IA and the 3 devices?

    any help would be great.
     
  2. #12

    Expert

    Nov 30, 2010
    16,278
    6,791
    Any schematic would be great.
    We can't imagine your supply voltages, current budget, and part numbers from here.
     
  3. crutschow

    Expert

    Mar 14, 2008
    13,003
    3,232
    Depending upon the input impedances of the circuits you are driving you should be able to connect their inputs all in parallel.
     
  4. #12

    Expert

    Nov 30, 2010
    16,278
    6,791
    There it is, a, "should" and an offer to check the power budget.
    Take your pick.
     
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