Course detail

Electronic Filters

FEKT-BPC-ELFAcad. year: 2023/2024

Analog filters are still inseparable parts of complex electronic devices. Thus, its analysis and design process belongs to the basic application-oriented bachelor capabilities. This course covers passive and active filtering structures with traditional and unconventional functional blocks (synthetic inductors, elements known as FDNR, super-niductors), filters which utilize special physical principles (SAW, crystal filters) as well as filters based on switching mechanism (switched capacitors). From the viewpoint of practical applications we are speaking about electronic systems with accumulation elelemts which are able to process signals with frequencies up to 100MHz in real time. In computer exercises students learn how to solve problems of computer-aided analysis and design of the typical filter topologies by using available software (Orcad Pspice, Snap, NAF, Matlab, Mathcad) including filter optimization from different aspects.

Language of instruction


Number of ECTS credits


Mode of study

Not applicable.

Entry knowledge

Knowledge of mathematics on secondary education level (operations with fractions, solving system of linear equations, algebraic handling with equations, Laplace transform) and electronics (principles of passive and basic active elements), describe simple circuit by using differential equations also belongs to required ability.

Rules for evaluation and completion of the course

Computer exercises during semester (20 points), laboratory measurement (20 bodů), written final exam (60 points).
Evaluation of activities is specified by regulation, which is issued by lecturer responsible for course and published annually.


Lectures are focused on the problems with filtration of the continuous-time signals and design of passive as well as active analog filters for practical applications in frequency bands up to 100 MHz.
Graduate of this course:
1. understand fundamental properties of lumped electronic filters and filtering in time and frequency domain
2. can interpret arbitrary transfer function and derive corresponding frequency characteristics
3. is able to design passive as well as active filter for particular application including calculation of numerical values of all circuit elements
4. describe function of crystal and SAW filters and structures with switched capacitors
5. completely analyze and design filtering networks by using computer

Study aids

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 BPC-AMT Bachelor's, any year of study, summer semester, elective
  • Programme BPC-IBE Bachelor's, any year of study, summer semester, elective
  • Programme BPC-SEE Bachelor's, any year of study, summer semester, elective

  • Programme BPC-AUD Bachelor's

    specialization AUDB-TECH , 2. year of study, summer semester, compulsory-optional

  • Programme BPC-EKT Bachelor's, 2. year of study, summer semester, compulsory-optional
  • Programme BPC-MET Bachelor's, 3. year of study, summer semester, compulsory-optional
  • Programme BPC-TLI Bachelor's, 3. year of study, summer semester, compulsory-optional

Type of course unit



26 hours, optionally

Teacher / Lecturer


Introduction to analog frequency filters, basic terms associated with frequency filters, types of filters, first-order and second-order passive filters, active filters and cascade synthesis of frequency filters, multifunctional filters, filters with synthetic building blocks (inductor, FDNR), all-pass filters, switched capacitor filters, crystal filters, monolithic filters, SAW filters.

Exercise in computer lab

13 hours, compulsory

Teacher / Lecturer


Orcad Pspice based analysis of frequency filters (basics and advanced), optimization of active filters, program NAF, design of synthetic functional blocks, audio filters and equalizers, switched capacitor filters.

Laboratory exercise

13 hours, compulsory

Teacher / Lecturer


Experimental measurement of selected types of passive and active frequency filters, students will gradually measure eight different products.