Overview:
In the first part, the sawtooth wave produces the first phase of the generation of rectangular waves and sawtooth waves.
Using an op amp (I chose LM328 because the single-supply LM324 can't reach the ground rail, and the LM358 can, although there are dozens of mvs, which is much better than the LM324). The Schmitt trigger produces a rectangular wave, then add one. The integrator can be turned into a triangle wave. Figure:
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