Course detail

Analog Filter Design

FEKT-BELFAcad. year: 2012/2013

The basic principles of the filters and its division. General theory of the signal filtration, filter parameters and its derivation. Passive RLC filters of the first, second and higher orders, different types and approximations. Computer aided design of the electrical filters, program PSPICE, SNAP, NAF and FILTER SOLUTION. Sensitivity and tolerance analysis of the filters. Frequency and impedance normalization and transformation. Active RC feedback filters with single, two and three operational amplifiers and other functional blocks. The filter with transmission zeroes. The filters with synthetic elements (superinductor, frequency dependent negative resistor). Allpass two-ports, equalizers, signal couplers and splitters. Current-mode filters. The filters with switched capacitors, special program for its design. Electromachanical and piezoelectrical filters. Filters with surface wave. Electronical tunning and control of active filter parameters. Filter optimization based on the different criterions.

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 students become familiar with the design methods of the analogue electrical filters, to improve the knowledge from the circuit theory and its suitable application, furthermore to improve the ability in computer aided design by PSpice and other software.

Prerequisites

The subject knowledge on the secondary school level is required.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

An emphasis is given on individual creative work of the students.

Course curriculum

1. Introduction, basic informations.
2. Fundamental notions from the field of electronic filters.
3. Passive RC filters, properties.
4. Passive RLC filters, properties.
5. Active devices and functional blocks used in filters.
6. Active RC filters with different orders.
7. Multifunctional filters.
8. Filters with synthetic elements.
9. All-pass phase-shift filters, frequency correctors.
10. Switched capacitors based filters.
11. Filters working on distinct physical principles.
12. Available software for analog filter design.

Work placements

Not applicable.

Aims

The aim of the course is to make students familiar with several types of the modern analogue filters, to teach them how to design passive and active filters of the high order, to make them familiar with computer aided optimal design, adequate simulation and verifying analysis, putting an emphasis on individual projects.

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

The content and forms of instruction in the evaluated course are specified by a regulation issued by the lecturer responsible for the course and updated for every academic year.

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 EEKR-B Bachelor's

    branch B-EST , 2. year of study, summer semester, optional specialized
    branch B-MET , 2. year of study, summer semester, optional interdisciplinary

  • Programme EEKR-CZV lifelong learning

    branch ET-CZV , 1. year of study, summer semester, optional specialized

Type of course unit

 

Lecture

26 hours, 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 the filter parameters.

Exercise in computer lab

26 hours, 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.