Triangle wave (170Hz) generator's circuit requirement

For initially for 2 cycles of triangular wave was not good and bit low amplitude but after 2 cycles it was stable and works good

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The problem is that the rectangular wave swings between 0V and +5V.
That will bring You a DC component of 2.5V at the - Input of Your OP-Amp.

You can avoid this when using a positive Voltage ( around 2.5V ) at the +Input of the Op-Amp by an voltage divider.
The exact Voltage depends of the Supply of the digital part's and the voltage losses of this parts, additional the input offset of the Op-Amp.
So the idea of gophert to use a pot there is very good.

Another Idea is to use only one supply with 10......12V ( than You have to use C-Mos 40xx chips ) and use the second OP of the LF353 to generate a virtual mass point ( +5V ).
The triangle wave swings in this case around 5V above GND.

wkrug said:

You can avoid this when using a positive Voltage ( around 2.5V ) at the +Input of the Op-Amp by an voltage divider

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note the two resistors and potentiometer connected to + input to generate said 2.5v virtual ground. The problem is the smallest DC drift causes the waveform to eventually migrate to one rail or the other.

Our OP cannot find a potentiometer in LTSpice. Is that truly missing or can someone point out how to find the Pot icon for him? I haven't used LTSpice in a long time and it is not on my current laptop

Eric Gibbs is the man.
ericgibbs
He supplied the pot model years ago. Pity I lost it in my defunct PC. So much for a non-existing back up.

The problem is the smallest DC drift causes the waveform to eventually migrate to one rail or the other.

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You're right.
Probably You can use the 2nd OP to steer the reference Voltage ( + Input ) of the integrator?!
When put a Low Pass filter in the output of the integrator and feed with this signal the 2nd OP that comare that with an reference Voltage.
So the drift should be compensed.