Triangle wave single opamp

[TheImpervious]

Hello all. I'm trying to make a triangle wave generator which will act as the pulse train for PWM. Based on the power specifications, I can only use a single opamp to generate the triangle wave (it is intuitive to use two: a square wave generator and an integrator). To do this, I am using a Schmitt trigger to generate a square wave with a 741. Due to the slow slew rate of the 741, the wave at the output closely resembles a triangle wave at 20kHz. My issue, however, is that I need the wave to oscillate from 0-5v, and I cannot figure out how to level-adjust the voltage and still get oscillation. This may a gross oversight by an inexperienced electronics student, but any advice would be greatly appreciated. Thank You!

 

[LvW]

TheImpervious,

I wouldn't recommend your approach, which means: I would not rely on the slew rate, which differs a bit from one unit to another and which is not temperature stable.
More than that, the reliable determination of the amplitude is a problem (as expected by you).
Why not use two low power opamps instead of one (AUDIOGURU would say: lousy) rather old fashioned 741?