Course detail

Analog Filter Design

FEKT-KELFAcad. year: 2018/2019

At present, the analog filters become inseparable parts of any complex electronic device. Thus its analysis and design process belongs to the basic bachelor capabilities. This group covers passive filters, active structures, filters which utilize unconventional physical principles (SAW, crystal filters) as well as filters based on some switching mechanism (switched capacitors). From the viewpoint of practical application we are speaking about electronic systems which are able to process signals with frequencies up to 100MHz. In exercises students solve problems of computer-aided analysis and design of the typical filter topologies by using available software (Orcad Pspice, Snap, FilterCAD, Filter Solution, NAF) including filter optimization from different viewpoints.

Language of instruction

Czech

Number of ECTS credits

5

Mode of study

Not applicable.

Guarantor

doc. Ing. Jiří Petržela, Ph.D.

Department

Department of Radio Electronics (UREL)

Learning outcomes of the course unit

The graduate is able (1) understand fundamental properties of the electronic filters in time and frequency domain, (2) design of passive as well as active filter for particular application including calculation of the values of circuit elements, (3) interpret function of the crystal filters and structures with switched capacitors, (4) analyze and design of the filtering networks by using computer.

Prerequisites

Knowledge of mathematics on secondary education level (operations with fractions, solving system of the linear equations, algebraic handling with equations) and electronics (principles of the passive elements, describe simple circuit by using differential equations) is requested.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Techning methods include lectures, computer laboratories and practical laboratories. Course is taking advantage of e-learning (Moodle) system.

Assesment methods and criteria linked to learning outcomes

Two computer exercises during semester (10 points), four individual student projects (20 points), final exam (70 points).

Course curriculum

1. Continuous-time filtering fundamentals, types of filters.
2. Transfer functions of the bilinear and biquadratic filtering sections.
3. Passive RC and RLC filters.
4. Design of the passive ladder filters using tabularized parameters.
5. Active elements used in filtering networks, active filters, topologies and cascade synthesis.
6. All-pass filters, properties and different structures.
7. Imittance converters and inverters, synthetic functional blocks, application examples.
8. Filters with switched capacitors, crystal filters, SAW filters, electromechanical conceptions.

Work placements

Not applicable.

Aims

Lectures are focused on the problems with filtration of the continuous-time signals and design of the analog filters for practical applications in different frequency bands.

Specification of controlled education, way of implementation and compensation for absences

Evaluation of activities is specified by a regulation, which is issued by the lecturer responsible for the course annually.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

T. DOSTÁL: Elektrické filtry - počítačová cvičení. Elektronická skripta. UREL, 2004. (CS)

Recommended reading

K. HÁJEK, J. SADLÁČEK: Kmitočtové filtry. BEN, 2002. (CS)

Classification of course in study plans

  • Programme EECC Bc. Bachelor's

    branch BK-EST , 2 year of study, summer semester, elective specialised

  • Programme EEKR-CZV lifelong learning

    branch EE-FLE , 1 year of study, summer semester, elective specialised

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Jiří Petržela, Ph.D.

Syllabus

Principal, object, types, characteristics and parameters of the EF.
Biquadratic RLC filters. Passive filters RC.
High-order RLC filters and design tools of them.
Active elements and functional blocks in filters, modeling of them.
Single-amplifier biquads (LP, BP, HP).
Multiple-amplifier biquads.
Elliptic ARC biquads and band-reject ARC filters.
Design of the high-order ARC filters, cascade synthesis.
ARC filters with functional blocks and synthetic elements.
All-pass filters and correctors.
Switched-capacitor and CCD filters. Current-mode filters.
Electro-mechanic, piezoelectric and PAW filters.
Optimization of designed filters. Tuning and controlling of parameters.

Exercise in computer lab

26 hod., compulsory

Teacher / Lecturer

doc. Ing. Jiří Petržela, Ph.D.

Syllabus

Simple passive filters RC and RLC.
Design of the high-order passive filters. Software NAF.
Optimization of the designed filters.
Comparing of sensitivity of active and passive filters.
Hierarchical modeling of active elements and functional blocks.
Single-amplifier and multiple-amplifier biquads, studying parasitic influences at HF.
Tuning and controlling of filter parameters, improving the value of Q.