#### DLD - Digital and Linear Circuit Design

DLD - Digital and Linear Circuit Design

# DLD - Digital and Linear Circuit Design

## Module Web Page

Lectures: 36 × 1-hr lectures.
Practicals: 7 × 3-hr practicals. §
Problem classes: 6 × 2-hr problem classes.
Private study: 108 hrs.
Assessment: 3 hrs.

§ Of the total scheduled 21 hours of practical time, 18 hours should be allocated to the laboratory exercises and the remaining 3 hours should be allocated for private study using the on-line examination paper and on-line tutorial conferencer.

## Assessment

Closed: Closed: an unseen 3-hour paper (worth 100 marks): answer 4 questions (25 marks each) from 6.

Open: none.

The two sections of the module are digital circuit design (taught by IDB) and linear circuit design (taught by AJF).

# DIGITAL CIRCUIT DESIGN

## Description

This section of the course gives an introduction to digital circuit design covering combinatorial and sequential circuits at the SSI and MSI levels.

## Aims

 1 Students should be able to analyse SSI and MSI level combinatorial and sequential logic circuits in both the logic and time domains. 2 Students should be able to design SSI and MSI level combinatorial and sequential logic circuits. 3 Students should understand the engineering approach to design. 4 Students will experience the use of commercially available CAD software.

## Content

Logic techniques: addition, subtraction, multiplication, division. Codes: weighted and unweighted codes, BCD, Gray codes, minimum distance, error detection and correction codes. Logic systems: adders, adders with look ahead carry, subtractors, multipliers, dividers.

Asynchronous and synchronous behaviour, sequential circuit design and analysis, asynchronous circuit analysis. Characteristic and excitation tables, state transition tables and diagrams. Basic devices: SR flip-flop, D-type flip-flop, T-flip-flop, JK flip-flop. Logic device considerations: set-up time, hold time, propagation delay, clock skew. Clocking mechanisms: master-slave, edge-triggered, master-slave with ones-and-noughts-catching feature, master-slave with data-lockout. Logic systems: clock generators, shift registers, latches, counters, semiconductor memory. Design of: counters, sequence generators, sequential circuits with asynchronous inputs, self-correcting sequential circuits. Programmable logic device architectures: GAL, registered outputs, registered inputs, latched inputs, exclusive-OR PALs, arithmetic gated feedback, versatile PALs, sequencers. CAD software: SPICE (transistor level simulation), HILO (gate level simulation).

## Teaching material

 1 A booklet containing copies of some overheads used during the lectures. 2 A booklet containing a set of laboratory exercises, supporting appendices, and a code of ethics. 3 An electronic book containing an examination paper with model answers, supplementary information, and a detailed marking scheme for each part of each question. 4 A computer conferenced electronic book, for groups of four students, containing questions in digital electronics, the answers being revealed to those who attempt to answer them.

## Recommended books

 *** Mano M.M., Digital Design (2nd ed.), Prentice Hall (1991) Further details (pbk) Further details (cloth) *** Wakerly J.F., Digital Design, Prentice Hall (1993) Further details ** Bolton M., Digital Systems Design with Programmable Logic, Addison-Wesley (1990) Further details +++ Fletcher W.I., Engineering Approach to Digital Design, Prentice-Hall (1980) Further details (pbk) Further details (cloth) ++ McCalla R., Digital Logic and Computer Design, Merrill (1992) Further details ** § Vladimirescu A. et al., SPICE 2G.5 User's Guide, Dept. of Electrical Engineering and Computer Science, Univ. of California (1981)

§ May be had from the Departmental Office.

# LINEAR CIRCUIT DESIGN

## Description

This section of the course provides an introduction to basic electricity and electronics, emphasizing the transmission of information rather than power, and thereafter concentrating almost entirely on analogue and digital circuits employed in the implementation of computer systems. It builds on the material presented in IDD.

Linear Circuit Design has to do with the engineering of electronic systems. The design of a system to do a job (top-down) must allow for its implementation by taking components and putting them together (bottom-up). You will need to become both an architect and a brick-layer.

## Aims

To enable the hardware-oriented student to follow hardware design courses and to undertake hardware projects. To enable the software-oriented student to be familiar with basic hardware ideas, and so to feel confident when such topics arise during team design discussions.

## Content

 19. Trigonometry and complex algebra. 20. Amplitude, frequency and phase. Example: power factor. The time and frequency domains. 21. AC concepts. Inductance. Impedance. 22. AC properties of CR circuits. 23. AC properties of LCR circuits. 24. Filters: band-pass, high-pass, low-pass, band-reject. 25. Review of bipolar transistors. 26. Transistor linear amplifiers: common collector, common base. MOSFETs. 27. Case study: the simple regulator. 28. Digital switching of continuous signals. Familiarity with switched-mode power supplies. 29. Differential amplifiers. Comparators. 30. Operational amplifiers: feedback, virtual earth. 31. Analogue adders, subtractors, integrators. 32. Simple oscillators. Quartz oscillators. 33. FSK-ed oscillators. Linear voltage-controlled oscillators. 34. DACs and ADCs. 35 - 36. Case study: a simple modem (FSK).

## Teaching material

A comprehensive set of notes can be purchased from the Computer Science Departmental Office.
A practical booklet will be available free of charge.
A set of problem sheets will be available free of charge.

## Recommended books

 *** Jones M.H., A practical introduction to electronic circuits (3rd ed.), Cambridge (1995) Further details (cloth) Further details (pbk) +++ Horowitz P. and Hill W., The Art of Electronics (2nd ed.), Cambridge (1989) Further details ++ Hayes T.C. and Horowitz P., Student manual for: The Art of Electronics (2nd ed.), Cambridge (1989) Further details +++ Senturia S.D. and Wedlock B.D., Electronic Circuits and Applications, Wiley (1975) Further details ++ Ritchie G.J., Transistor Circuit Techniques: Discrete and Integrated (3rd ed.), Chapman & Hall (1993) Further details ++ Jeffrey A., Mathematics for Engineers and Scientists, Chapman & Hall (1989) Further details * Hsiang W.Y., A Concise Introduction to Calculus, World Scientific Pub. Co., Singapore (1994) Further details + Ledermann W, Complex Numbers, Routledge & Kegan Paul (1960) * Tallarida R.J., Pocket Book of Integrals and Mathematical Formulas (2nd ed.), CRC Press (1992) Further details