Control applications of op amps

Question 1

Define a PID controller in terms of op-amps

Answer 1

A combination of op-amps and a summing op amp to control variables within a control system
-proportional, integral and derivative

Question 2

What is the equation for output voltage in an integrator op amp

Answer 2

Vout = -1/RfCf ∫Vin(t)dt

Question 3

What is the equation for output voltage of a differentiator op amp?

Answer 3

Vout = -RfCf x dVin/dt

Question 4

What is an application of an integrator op amp?

Answer 4

Converting a square wave to a triangle wave