Industrial Electronics

Subject description

Introduction to the operational amplifier; Characteristics of the ideal operational amplifier and real-world deviation (impact of final gain, input and output resistance, current, offset voltage, attenuation of common mode voltage); Study of basic linear and nonlinear circuits with an operational amplifier (adder, subtractor, integrator, differential, logarithmic and exponential amplifier, multiplier); Equivalent circuits and mathematical models of circuits for DC steady-state and small-signal changes; Overview, derivation of mathematical models, sensitivity analysis in the case of selected circuits of measuring and control technology (current / voltage and voltage / current converter, operational amplifier circuits, instrumentation amplifier, peak and effective value measurement, precision half-wave and full-wave rectifier, serial and parallel voltage stabilizer circuit, controllers (P,I,PID), voltage limiters); Introduction to active filters.

The subject is taught in programs

Objectives and competences

The objective of the course is to provide the student with knowledge in the field of signal processing circuits based on an operational amplifier. The subject includes technical challenges from various technical fields (measuring, process and controlling technique). It provides theoretical bases for the analysis and assessment of the deviations caused by the properties of the real components. It provides knowledge about the constraints of such components and circuits that are formed by real components.

Teaching and learning methods

The lectures give the theoretical basics of the discussed chapters together with the presentation of the process of solving simpler practical challenges. Students are provided with detailed study material. Practical work is carried out within laboratory exercises, where students gradually learn about components, their real properties and their role in various basic circuits. They also learn about measuring instruments and the most common hazards and measurement errors.

Laboratory models allow the simultaneous work of two or three students who report the final results at the end of the semester by comparing the results from the literature.

Expected study results

After successful completion of the course, students should be able to:

– describe the structure of the operational amplifier,

– explain (with the help of an equivalent circuit) the cause of the deviations between the real and the idealized amplifier,

– calculate the deviations that result due to the  idealized analysis,

– develop the input-output relationship of the discussed circuits,

– implement the analytical procedures to evaluate the operation of simpler and more complex circuits,

– design and argue the concepts of more complex circuits in the field of measuring, process and controlling techniques.

Basic sources and literature

  1. P. Šuhel: Sistemi industrijske elektronike: Operacijski ojačevalniki, Univerza v Ljubljani, Fakulteta za elektrotehniko, Ljubljana, 1990.
  2. P. Zajec: "Interna skripta-zapiski predavanj", 2012; spletna učilnica eFE.
  3. T.E. Price: Analog Electronics, Prentice Hall, London, 1997.
  4. J.M. Jacob: Analog Integrated Circuit Applications, Prentice Hall, New Jersey, 2000.
  5. R.F. Coughlin & F.F.Driscoll: Operational Amplifiers and Linear Integrated Circuits, Prentice Hall, New Jersey, 2001.

Stay up to date

University of Ljubljana, Faculty of Electrical Engineering Tržaška cesta 25, 1000 Ljubljana

E: T:  01 4768 411