Lab #8

1. The comparator outputs a square wave and the integrator outputs a triangle wave.

2. If the Vin of an integrator is positive, it will ramp down, and if the Vin is negative, it will ramp up.

3. With a comparator, if the op amp’s + input is connected to a greater voltage that that connected to it’s – input, the op amp’s output will be about negative 9v DC.  If the op amp’s + input is connected to a lower voltage that that connected to it’s – input, the op amp’s output will be about positive 9v DC.

4. So the bigger the resistance R you use the slower the ramp gets, and the bigger the capacitor gets the slower the ramp gets.

5. You need multiple op amps to create a polyphonic synth.