Circuits of Digital Instruments

Lecturer:

Tutor:

Supervisor:

Department of Measurement

Synopsis:

Basic types of circuits and blocks of digital measuring instruments are described and analysed. Range and linearity for analogue circuits and interfaces for digital circuits are analysed in detail. Finally, individual projects including block design, model realisation and parameters verification are solved.

Requirements:

Syllabus of lectures:

1. General structure of digital measuring devices and signal generators

2. Directly coupled amplifiers and attenuators, insulating and modulating amplifiers

3. Mean value and RMS converters (knowledge extension to 38EM), peak detectors

4. Analogue time-continuous filters and filters with switched capacitors, oscillators, mixers

5. Reference voltage and current sources, harmonic and function generators

6. Relations between analogue measuring blocks - signal ranges, linearity and noise. Switching and coupling circuits

7. Time and amplitude signal discretisation, samplers, errors

8. Analogue-to-digital converters (knowledge extension to 38EM)

9. Digital-to-analogue converters, signal reconstruction

10. Frequency and phase digital measurement blocks, phase synchronization, direct digital synthesis

11. Interface circuits for standard buses and interfaces

12. Rules for design of analogue and digital parts from the point of view of electromagnetic compatibility

13. CAD of measuring circuits - simulation and its pros and cons

Syllabus of tutorials:

1. Introduction, safety, organization. Input circuits of measuring devices - dynamic parameters

2. Input circuits of measuring devices - disturbance immunity

3. Generators of testing signal. Direct digital synthesis

4. Measuring voltage and current amplifiers

5. Mean value and RMS converters, non-linear amplifiers

6. Analogue time-continuous filters, switched capacitor based filters

7. Oscillators and mixers

8. Project - design of measuring block, model development and parameter comparison with professional solution

9. Project: block design

10. Project: model part I

11. Project: model part II

12. Project: model part III

13. Project: parameter comparison with professional solution

Study Objective:

Study materials:

[1] Vedral, J., Fischer, J.: Elektronické obvody pro měřicí

techniku, Vydavatelství ČVUT, Praha 1999

[2] Regtien, P. P. L.: Measurement science for engineers.

London, Kogan Page Science, 2004, ISBN 1-9039-9658-9

[3] Witte,R.A.: Electronic Test Instruments. Analog and

Digital Measurements. 2nd Edition. Prentice Hall PTR, 2002,

ISBN 0-13-066830-3

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Cybernetics and Measurements- structured studies (compulsory elective course)