Teacher

prof. aggr. Francesco DRIUSSI

Credits

6 CFU

Language

Italian

Objectives

The objectives include the understanding of the operation, the analysis methodologies, the design principles and the performance of complex digital and analog circuits. In particular, for the analog electronics, multistage amplifiers, the operational amplifiers and the feedback circuits will be described and analyzed. The theoretical bases for the study and the correct design of stable circuits will also be presented. Finally the analysis of the operation and design of oscillators will be introduced.

Acquired skills

- Understanding op-amp applications.
- Design of single-stage and multi-stage amplifiers.
- Analyzing the frequency response of amplifiers.
- Analyzing the feedback in amplifiers and their stability.
- Understanding some issues on analog integrated circuits.

Lectures and exercises (topics and specific content)

Operational amplifiers and their applications: ideal op-amp; application of inverting and non-inverting configurations; effects of non-ideality of op-amps (12 hours).
Multistage amplifiers: method for solving multistage amplifiers; analysis of a C-E/C-D stage; analysis of Cascode configuration (4 hours).
Frequency Response: low and high-frequency response of amplifiers; method for estimating cross-over frequencies (Circuit time constants); high-frequency BJT model; Miller effect (4 hours).
Feedback:  general feedback structure; properties of negative feedback; four basic configurations; approximated method for the analysis of amplifiers with feedback (8 hours).
Waveform-shaping circuits: multivibrators; comparators; comparator with hysteresis; triangular and square waveform generators (6 hours).
Internal structure of operational amplifiers: description of the internal structure of operational amplifiers (4 hours).
Current mirrors: current mirros and their applications (2 hours).
Voltage references: bandgap voltage references (2 hours).
Comparators: comparators for integrated circuits and operational amplifiers (2 hours).
Exercises: exercises (2 hours for each of the abovementioned topics); example of design of simple circuits; validation of performance with simulation tools (16 hours).

References

- Richard C. Jaeger, Microelettronica, Mc Graw Hill
- Jacob Millman, Arvin Grabel, Microelectronics, second edition, Mc Graw Hill
- Calzolari, Graffi, Elementi di elettronica, Zanichelli

Type of exam

Written and oral

Additional material or information on line