This circuit is an oscillator that generates a triangle wave. The second half of the circuit is an inverting integrator. The first op-amp starts with its two inputs in an unknown state; say it starts with + slightly higher than - (which is at ground). The op-amp greatly amplifies this difference, driving its output to the positive op-amp supply voltage, its maximum output (15 V in this case). With this positive input, the integrator's output falls at a constant rate. The 10 kΩ and 4 kΩ resistors act as a voltage divider that places the first op-amp's + input at 4/14 of the way from the second op-amp's output to the first op-amp's output. When this input reaches ground, the first op-amp's output switches polarity, and the integrator switches direction, forming the second half of the triangle. When the first op-amp changes polarity again, a new cycle begins. To hear the signal, increase the simulation speed and press the Play button.
This page is a utility for simulating генератор треугольных волн online with specified initial values.
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