Sampled-Data Analog Circuits

Lecturer:

Pravoslav Martinek (gar.)

Tutor:

Pravoslav Martinek (gar.)

Supervisor:

Department of Circuit Theory

Synopsis:

This subject deals with sampled-data analog circuits, namely switched-capacitor (SC) and switched-current (SI) circuits. It explains problems of sampled-data circuit description and differences to the continuous-time circuit behavior. An attention is devoted to the circuit analysis and simulation and suitable software means. The main building blocks are described including circuit design and non-ideal circuit properties. Circuit design and optimization technique is explained and discussed, together with constraints given by technological requirements. Practical design examples of filters, converters and other circuits are presented.

Requirements:

Syllabus of lectures:

1. Sampled-data analog circuits - a survey, description, properties, s-z transformation

2. Switched-capacitor circuits, circuit description, the basic building blocks

3. Time- and frequency-domain SC circuit analysis, method of nodal charge equations

4. Software means for SC circuit analysis

5. Switched-current circuits - a principle, circuit description, the basic building blocks

6. SI circuit analysis, application of nodal-voltage method, a comparison to the SC circuits

7. Non-ideal behavior of SC and SI circuits, non-ideal circuit simulation - possibilities, limitations

8. A software means for non-ideal SC and SI circuits simulation

9. Procedures and algorithms for SC and SI circuit design

10. Design of SC and SI filters, SC and SI biquads, design optimization

11. Higher-order SC and SI filters, design methods, optimization conditions

12. Circuit design with respect to the non-ideal properties influence minimization

13. General optimization procedures for SC and SI circuit design, technological constraints

14. Future trends and developments of SC and SI circuits

Syllabus of tutorials:

1. General properties of sampled-data systems, s-z transformation: types, applications, properties

2. SC circuit description by the difference equations, transformation to the frequency domain

3. An application of nodal charge equation method in SC circuit description

4. Computer-based SC circuit analysis, SCSYRUP library under MAPLE

5. SI building blocks and their description by using difference equations

6. Nodal-voltage method adapted for two-phase sampled-data circuits and its application

7. SI circuit analysis software means, SISYRUP library under MAPLE

8. Non-ideal sampled-data circuit simulation - SPIN software

9. Non-ideal sampled-data circuit simulation using SPICE

10. Design and simulation of SC and SI filter using biquads, a biquad design optimization

11. Design and simulation of SC and SI filter using LC prototype simulation

12. A comparison of SC and SI circuits, building block design with respect to the technological constraints

13. Design optimization with respect to the non-ideal circuit behavior

14. Semestral work presentation

Study Objective:

Study materials:

1. Unbehauen, R., Cichocki, A.: MOS Switched capacitor and Continuous-Time Integrated Circuits and Systems. Springer-Verlag, Berlin 1989

2. Toumazou, C., Hughes, J.B., Battersby, N.C.: Switched-Currents an analogue technique for digital technology. Peter Peregrinus, Ltd, 1993

3. Toumazou, C., Battersby, N.C., Porta, S.: Circuits and Systems Tutorial. IEEE Press, New York, 1996

Note:

Further information:

No time-table has been prepared for this course

The course is a part of the following study plans:

• Electronics - Electronic Systems- structured studies (compulsory course)