What are the essential features of an ideal op amp? Identify the terminals of an op amp.

1. What is an IC? What are its special features? Why is it so commonly used in electronic circuits?

2. What are the essential features of an ideal op amp? Identify the terminals of an op amp. Draw its equivalent circuit. Define virtual ground.

3. Draw circuits of

(a) inverting amplifier

(b) non-inverting amplifier

(c) summer amplifier.

4. What is difference amplifier? Draw its circuit. Define C.M.R.R.

5. How can integrating and differentiating circuits be realized using op amps? Draw the configurations.

6. Devise an op amp circuit to multiply two signals X and Y.

7. Design an operational amplifier circuit that can be used to produce an output that ranges from 0 to - 5 V when the input goes from 0 to 100 m V.

8. An inverting amplifier has an input resistance of 2 kilo. Determine the feed- back resistance needed to give a voltage gain of 100.

9. Design a summing amplifier circuit that can be used to produce an output that ranges from -1 to - 5 V when the input goes from 0 to 100 m V.

10. A differential amplifier is used with a thermocouple sensor in the way shown in Figure 4. What values of R1 and R2 would give a circuit which has an output of.