Course detail

Theory of AD and DA Signal Conversion

FEKT-LTVPAcad. year: 2019/2020

Structure of a chain of blocks for analogue signal processing a nd reconstruction of digitized signal, applied codes. Programmable amplifiers, analogue multiplexers, input filters. SH and TH circuits. Parameters and types of DACs, chip structures, application notes. Parameters and types of ADCs, chip structures, application notes. Self calibration, testability. Vf and fV converters, Df converters, digital measurement of time intervals, phase, frequency.

Individual laboratory tasks lead to the creation of a complete datasheet of an unknown A /D converter (ADC). Five exercises are devoted to this purpose.
Thematically, the exercises are focused on:
1. measurement of consumption depending on the converter operating mode (clock signal frequency, supply voltage, function mode),
2. ADC static measurement - INL, DNL, offset, range (Full Scale Error), Gain Error and temperature influence),
3. measurement of influence of external factors on static parameters of converter - influence of supply voltage, clock frequency, clock signal and temperature influence,
4. evaluation of dynamic parameters of the converter - SNDR, ENOB, THD, SFDR,
5. evaluation of crosstalk influence using multiple channels, crosstalk size depending on supply voltage, frequency and temperature influence.

Language of instruction

Czech

Number of ECTS credits

6

Mode of study

Not applicable.

Guarantor

doc. Ing. Jiří Háze, Ph.D.

Department

Department of Microelectronics (UMEL)

Learning outcomes of the course unit

The student is able to:
- define the basic blocks signal processing chain of ADC and DAC,
- define and explain the basic parameters of AD and DA converters,
- describe the static transfer characteristic of AD and DA converters and mark some static parameters in it,
- describe the basic blocks of AD and DA converters (S/H, T/H stages, filters, reference, etc.), as well as design of those stages,
- describe and explain the function of the various structures of AD and DA converters, as well as on the basis of given parameters to select and design the most appropriate structure for the application.

Prerequisites

The subject knowledge on the Bachelor´s degree level is requested mainly design of analog and digital circuits and knowledge of analysis and signal processing.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods include lecture and laboratory excercises.

Assesment methods and criteria linked to learning outcomes

- a maximum of 40points for protocols of laboratory exercises,
- a maximum of 60 points for the written final exam.

Course curriculum

Lectures
1 Basic information about ADC and DAC
2 Signal preprocessing
3 Filters
4 Sampling circuits
5 Reference sources
6 DAC
7 ADC
8 Sigma-delta converters
9 Another types of converters
10 Testing
11 New trends

Individual laboratory tasks lead to the creation of a complete datasheet of an unknown A /D converter (ADC). Five exercises are devoted to this purpose.
Thematically, the exercises are focused on:
1. measurement of consumption depending on the converter operating mode (clock signal frequency, supply voltage, function mode),
2. ADC static measurement - INL, DNL, offset, range (Full Scale Error), Gain Error and temperature influence),
3. measurement of influence of external factors on static parameters of converter - influence of supply voltage, clock frequency, clock signal and temperature influence,
4. evaluation of dynamic parameters of the converter - SNDR, ENOB, THD, SFDR,
5. evaluation of crosstalk influence using multiple channels, crosstalk size depending on supply voltage, frequency and temperature influence.

Work placements

Not applicable.

Aims

The target of subject is to introduce fundamental principles of A/D and D/A converters, parameters of integrated converters and their applications.

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

Laboratory exercises are mandatory. Properly excused absence from seminars can be replaced by appointment with the teacher.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Háze, J. a kol..: Teorie vzájemného převodu analogových a číslicových signálů. Učební text, Brno 2010. (CS)

Recommended reading

Not applicable.

Classification of course in study plans

  • Programme EEKR-ML Master's

    branch ML-MEL , 1 year of study, summer semester, elective specialised

Type of course unit

 

Lecture

26 hod., optionally

Teacher / Lecturer

doc. Ing. Jiří Háze, Ph.D.

Syllabus

Converters in in data acquisition systems. Electronic switches, precision programmable amplifiers.
Sample/hold and trach/hold amplifiers, parameters, application notes.
Fundamental static and dynamic parameters of AD and DA conversion, precision, resolution.
Reference voltage and current sources. Numerical code bases applied in AD and DA theory.
Digital-to-analolgue converters (DAC). Fundamental structure. Paralel DACs using weighed currents, DACS exhibiting monotonicity.
Integrated DACs, indirect DACs, seriál DACs, DACs exploiting selfcalibrating, over-sampled and noise-shaping DACs, solution on chip, DACs application.
Analogue-to-digital converters (ADC). Fundamental structure, one- and multistage flash ADCs, approximation ADCs, integration converters.
Sigma-delta ADCs, SC ADCs, other ADC types. Self-calibrating and self-zeroing in ADCs.
Voltage-to-frequency converters (Vf), charge-balancing converters, dynamic parameters improvement, phase noise rejection, precision.
Frequency-to-voltage converters (Vf), converters exploiting counters and DACs, integrating converters, accuracy. Analog interface of data acquisition systems, communication between ADCs, DACs and microprocessors, plug-in I/O units of PC computers.
Interference rejection of spurious sources in ADC and DAC interfaces. Gigital correction improving final ADC and DAC precision.
Design and application rules for DAC and ADC. Testing od converters.
New trends in ADCs and DACs..

Fundamentals seminar

8 hod., optionally

Teacher / Lecturer

doc. Ing. Jiří Háze, Ph.D.

Syllabus

Filters, sampling, aliasing
DAC with PWM
DAC with resistor network R-2R
Sigma delta ADC
Properties of ADC and DAC

Laboratory exercise

31 hod., compulsory

Teacher / Lecturer

doc. Ing. Jiří Háze, Ph.D.

Syllabus

Filters, sampling, aliasing
DAC with PWM
DAC with resistor network R-2R
Sigma delta ADC
Properties of ADC and DAC