Flow in sallen key bandpass filter?

Discussion in 'General Electronics Chat' started by bumle90, Mar 28, 2005.

  1. bumle90

    Thread Starter New Member

    Mar 27, 2005
    6
    0
    Hello.
    I have attached an image of a circuit. I don't understand why the current travels like the arrows I have painted there.
    How should the current be flowing? If it is like i drew, then howcome the circled arrow is not turned around?
    I would say the current goes from input to output and not the other way around.
    Please help me understand. Many regards.
     
  2. David Bridgen

    Senior Member

    Feb 10, 2005
    278
    0
    Within the passband the circuit has gain and is non-inverting. The output voltage will be higher than the input voltage. Current will flow from the higher to the lower voltage node.
     
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