Module Details

CE336-6-SP-CO: Audio Electronic Systems And Design

Year: 2016/17
Department: Computer Science and Electronic Engineering
Essex credit: 15
ECTS credit: 7.5
Available to Study Abroad / Exchange Students: Yes
Full Year Module Available to Study Abroad / Exchange Students for a Single Term: No
Outside Option: No
Pre-requisites: CE262 AND CE263
Co-requisites:
Comments: Direct year entrants should be familiar with CE163 and CE164

Staff
Supervisor: Professor Malcolm Hawksford
Teaching Staff: Professor Malcolm Hawksford
Contact details: CSEE School Office, email: csee-schooloffice (non-Essex users should add @essex.ac.uk to create full e-mail address), Telephone 01206 872770mail address), Telephone 01206 872770

Module is taught during the following terms
Autumn Spring Summer

Module Description


The course builds on the module established in CE263 and presents a number of electronic design techniques that relate to general electronic systems and especially audio systems. The course focuses on the analysis and application of negative feedback, system design and circuit-level operation where the aim is to engender an intuitive understanding of circuit functionality as well as more formal analysis and use of simulation techniques. These topics find application in main stream analogue design, analogue-digital interfacing and audio systems.

Learning Outcomes

1. Understand feedback and its importance in amplifier design
2. Use a servo amplifier to control the dc conditions of an amplifier
3. Use MultiSim to perform circuit-level simulation
4. Understand the fundamentals of LPCM and SDM methods of conversion using signal processing
5. Explain the requirements and function of a power amplifier, analyse the "current dumping" amplifier
6. Understand the functionality of a phase-lock loop (PLL) in both analogue and digital applications
7. Explain and model a moving-coil loudspeaker system with an all-pass crossover network
8. Use noise sources, noise analysis and noise optimization in transistor circuits

Pre-requisites:
CE263 Alalogue Devices and Circuit Design

Syllabus

Negative feedback in analogue system design:
Closed-loop transfer function, loop transfer function, stability, effect of feedback on input and output impedance, distortion reduction and error correction including feed-forward, dc servo amplifiers and applications.

Audio Power Amplifiers
Comparison of voltage amplifier and power amplifier, use of negative feedback to reduce output impedance and non-linear distortion, class A, AB and B output stages, biasing using the amplified diode, crossover distortion, output-stage circuit examples, amplifier efficiency, bridge output stage, current dumping amplifier.

Noise in Amplifiers:
Noise factor, equivalent circuit noise model, cascaded stages, effect of feedback on noise figure, optimal noise design.

Phase-Lock Loops (PLL):
Phase-lock applications, principles of phase lock including example applications and feedback modelling, phase-sensitive detectors (PSD), comparison of analogue and digital detectors.

Analogue-to-digital and digital-to-analogue conversion:
Specifications and performance requirements; resolution and accuracy; sampling; quantiziation and dither, differential and integral non-linearity, R-2R ladder converters, current-to-voltage conversion, noise shaping, sigma-delta modulation (SMD); de-correlatioin techniques; sampling rate conversion.

Loudspeaker Systems:
Electro-acoustic transduction using pistonic radiator, moving-coil drive unit and equivalent circuit representation, multi-way loudspeaker systems and mathematical description of the all-pass family of crossover networks up to the fourth-order Linkwitz-Riley (LR-4) alignment, digital-and-active loudspeaker systems.

Learning and Teaching Methods

to be advised

Assessment

30 per cent Coursework Mark, 70 per cent Exam Mark

Coursework

Progress Test = 10% to take place in wk 21, Lab Report 1 = 2% submitted in WK 20, Lab Report 2 = 1% submitted in wk 21, Lab Report 3= 2% submitted in wk 22, Lab Report 4 = 1% submitted in wk 23, Lab Report 5 = 1% submitted in wk 24, Final report based on overall laboratory work =13%, submitted to FASER in wk 25.

Exam Duration and Period

2:00 during Summer Examination period.

Other information

STUDENTS SHOULD NOTE THAT THIS MODULE INFORMATION IS SUBJECT TO REVIEW AND CHANGE

Bibliography

  • Substantial notes and back ground reading are provided

External Examiner Information

  • Name: DR Pandelis Kourtessis
    Institution: University of Hertfordshire
    Academic Role: Reader