[SOLVED] Small footprint, 3V pk-pk, 7KHz, triangle signal generator

[expert_vision]

I designed a 3V pk-pk 7KHz triangle signal generator following the NE555 datasheet application, as shown in the picture below.
My only fear is though, that the signal might not look as good as in the simulation, considering that the op amp is at it's very edge operating at >7KHz with 100x (40dB) closed-loop gain.

Are there better ways to achieve such a signal?
The signal is used for PWM.

 

[Audioguru]

Your "triangle wave" has curved sides because it is very simply produced by the capacitor being charged and discharged by a resistor.
If the circuit is an integrator with an opamp then the triangle wave will be almost perfect.

 

[expert_vision]

OK, I found a much better solution than mine that uses a trigger schmidt and a integrator, but for some reason the circuit doesn't oscillate in Proteus.
https://www.edn.com/design/analog/4312118/Single-IC-forms-precision-triangular-wave-generator

 

[Audioguru]

Many oscillators must be "kicked" to get them started in a simulator. In a real circuit the abrupt power supply voltage rise kicks them to get them started.