op LFO to trem circuit

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hello,


looking for a way to use this lfo as trem on this op set up.


lfo puts out 0 to 5vdc. am wanting to use maybe a fet or transistor in between some how just not sure how to do it. i have found similar circuits (see 2nd pic) but they are for non inverting. Not sure how to adapt to inverting op



any advice or drawings, links would be great thanks
 

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