Op amp lab

Question 1

What does a Bode plot show?

Answer 1

Frequency vs gain and frequency vs phase

Question 2

In the lab, where was clipping first observed and what was teh voltage of the supply rails?

Answer 2

Clipping was first observed at 14.8V when the supply rails were at 15V

Question 3

Define saturation of an op amp

Answer 3

When the output voltage of an op amp exceeds the possible range of the supply rails

Question 4

Define clipping

Answer 4

When saturation causes the signal to be cut-off

Question 5

In the lab, for the bode plot, why is voltage measured between frequencies 100Hz to 1.2Mhz

Answer 5

The amplitude of the voltage will be too small

Question 6

Explain how a comparator open loop op amp works

Answer 6

When Vinvert < Vnoninv, the output will be HIGH and saturate at the positive supply rail.
When Vinvert > Vnoninv, the output will be LOW and saturate at the negative end of the supply rail.