O Draw the four possible negative feedback contigurations of an op-amp. Write the input and output impedances of these configurations in ideal cases. 5

Operational amplifiers or Op-amps are essentially at the core of every analog device and perform varied functions and operations. Describe what an operational amplifier is and what its major applications are. Also describe what an ideal model for op amp is and some of the main assumptions made for an op amp to be modeled with an ideal model.

9. Suppose we design an inverting amplifier using 5% tolerance resistors and an ideal op-amp. The nominal amplifier gain is -20. Answer the following two questions: a. What are the minimum and maximum possible gains? b. What is the percent tolerance of the gain?

Draw the circuit diagram of the basic inverting amplifier configuration. Give an expression for the closed-loop voltage gain of the circuit in terms of the resistances, assuming an ideal op amp. Give expressions for the input impedance and output impedance of the circuit.

Draw the circuit diagram of an op-amp voltage follower. What value is its voltage gain? Input impedance? Output impedance?

For the op-amp shown in the following figure, the purpose of R1 and R2 is- R2 R1 Select one: O a. to set input impedance O b. to set input impedance and voltage gain O c for bias current compensation O d. for input offset voltage compensation.

Draw an op amp symbol including sources to account for offset voltage, offset current, and bias current. What is the principal effect of these sources in an amplifier circuit?

A noninverting amplifier is being designed to have a closed-loop gain of 36 dB. What op-amp gain is required to have the gain error less than 0.15 percent?

Discuss what a difference amp is, give equations and details, what is a single-ended and differential signal, what is a 4-20 mA signal, what is common-mode noise and why is a difference amp used?

The op amp in the circuit of Figure is ideal.a) What op amp circuit configuration is this?b) Find ?0 in terms of ??.c) Find the range of values for ?? such that ?0 does not saturate and the op ampremains in its linear region of operation.