Active Comparitors

Question 1

Draw an Open Loop Op-amp Comparitor

Draw an Open loop Op-Amp comparator with a reference voltage

Answer 1

Question 2

Explain the transition region of a comparator

Answer 2

Question 3

Describe two major drawbacks of Open-loop op amp comparators

Answer 3

Question 4

Draw a Schmidt Trigger with an Offset of 0 volts

What problem does it solve from the Open Loop Op-Amps

Answer 4

Question 5

What is the output of the positive terminal of a Schmidt Trigger

Answer 5

Question 6

What are the two threshold “crossover” voltages of the Schmidt Trigger

What is the gap between the threshold voltages called

R1 is Closer to ground

Answer 6

Question 7

R1 is connected to ground

Answer 7

Question 8

Draw an asymmetrical Schmidt trigger

What is the Equation to calculate the centre of the hysterisis loop

Answer 8

Question 9

Calculate the threshold voltages for an Asymmetrical Schmidt Trigger

Answer 9

Question 10

Answer 10

Question 11

Draw a Non-Inverting and Inverting Schmidt Trigger

Answer 11

Question 12

This is the Input Voltage as seen by an oscilloscope

It is connected to two amplifiers

Non-Inverting Schmidt Trigger and An Open Loop Comparator

Draw the Output of both Circuits

Answer 12

Question 13

This is the Input Voltage as seen by an oscilloscope

It is connected to two amplifiers

Non-Inverting Schmidt Trigger and An Open Loop Comparator

Draw the Output of both Circuits

Answer 13