Course detail

# Analog Filter Design

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.

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.

Recommended optional programme components

Not applicable.

W. K. CHEN: The circuits and filters handbook. CRC Press, Florida, 2000 (EN)
L. P. HUELSMAN: Active and passive filter design. McGraw-Hill New York, 1993 (EN)
T. DOSTÁL: Elektrické filtry - počítačová cvičení. Elektronická skripta. UREL, 2004. (CS)
A. B. WILIAMS, F. J. TAYLOR: Electronic filter design handbook. McGraw-Hill New York, 1995 (EN)
K. HÁJEK, J. SADLÁČEK: Kmitočtové filtry. BEN, 2002. (CS)

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).

Language of instruction

Czech

Work placements

Not applicable.

Course curriculum

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

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.

Classification of course in study plans

• Programme EEKR-BK Bachelor's

branch BK-EST , 2. year of study, summer semester, 5 credits, optional specialized

• Programme EEKR-CZV lifelong learning

branch ET-CZV , 1. year of study, summer semester, 5 credits, optional specialized

#### Type of course unit

Lecture

26 hours, optionally

Teacher / Lecturer

Computer exercise

26 hours, compulsory

Teacher / Lecturer

eLearning