feedforward and amplification

Discussion in 'General Electronics Chat' started by artmaster547, Jan 16, 2016.

  1. artmaster547

    Thread Starter Member

    Jan 6, 2016
    89
    1
    Hi
    There I have created a phase shift oscillator that I am very happy with as I have removed distortion using amplitude gain control via a JFet but would like to reduce distortion even further using "Feedforward", I saw this technique being used in the article I am attaching with this message entitled: "Important to the distortion removal", what I have so far is also posted in the form of an LTSpice file and screenshot. I would like to implement this topology into my circuit but have not been successful I have found the oscillations to then decay after implementing the summing amplifier. I would also like to change the amplitude of the sine wave I would like it to oscillate between 1v and 3v it currently oscillates about the reference 2v but should I just use a non-inverting amplifier to increase the amplitude of the oscillations? Any help would be much appreciated

    Thanks Art
     
  2. crutschow

    Expert

    Mar 14, 2008
    13,001
    3,229
    Yes, you could add a non-inverting amp to get more gain at Vout1

    Why are you biasing he circuit at 2V instead of at 1/2 the supply voltage as is usual with single supply circuits? :confused:
     
  3. artmaster547

    Thread Starter Member

    Jan 6, 2016
    89
    1
    Is this bad practise I wanted to raise the oscillation from zero to 2V, would suggest against doing this?
     
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