# triangular and square wave generator

the circuit below is a triangular and square wave generator. With the first stage (the integrator) I can generate a triangular wave, and with the second stage (comparator) I can generate a triangular wave with a limited amplitude.

I've never seen this circuit with the net circled in red. What does this net does?

The text of the exercise says: Analyze the circuit assuming ideal op-amps. ...the circuit is an astable multivibrator in which zener diodes are ideal with Von =0,6V and Vbkd = 5.6V. 1)Describe the circuit and what kind of waveform can be found at Vout and Vs 2) find R1 and R2 in order to obtain an amplitude of Vout of Vpeak = 10V, and f = 10kHz.

• I expect the opamp (or comparator) part numbers are the key to the answer.
– user16324
Oct 31, 2016 at 13:20
• For my opinion, R5 - together withe Z-diodes - constitutes a kind of output voltage stabilization at a fixed level. This makes sense because it is this voltage which feeds the integrator.
– LvW
Oct 31, 2016 at 13:39