Electronic Design Project

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Electronic Design Project
ELE 12EDP
ELECTRONIC SYSTEMS DESIGN
George Alexander G.Alexander_at_latrobe.edu.au http/
/www.latrobe.edu.au/eemanage/
23 August, 2004
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Contact Details
Lecturer George Alexander Department Electroni
c Engineering Office Physical Sciences 2 PS2
129B E-mail G.Alexander_at_latrobe.edu.au Website
www.latrobe.edu.au/eemanage/ Availability Mon,
Wed, Fri
PLEASE NOTE when e-mailing type ELE 11EDP in the
subject field
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Timetable

• LECTURES
• Monday 0900 HS2 222
• Monday 1100 HS2 223
• Lab sessions (2hr)
• Monday 15.00 BG 320/324
• Wednesday 11.00 BG 320/324
• Friday 11.00 BG320/324

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Assessment

• 1-hour examination (closed book) 30
• Major project 50
• Assignments and laboratory work 20

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Reading

• Australian Standard 1000
• Standards Association of Australia
• Digital Systems, Principles and Applications
• Tocci, R.J. and Widmer, N.S. 8th edition,
  Prentice-Hall, 2001
• Project Management From Idea to Implementation
• Haynes, M.E. Kogan Page, 1990

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Approach to the topic

• Presentation of the principles of Electronic
  Systems Design (based on notes prepared by Jim
  Whittington, School of Electronic Engineering).
• Some practical insights into how these principles
  have applied in practice in a leading
  telecommunications company.
• Relating this to the EDP project

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Background George Alexander

• BSc (Eng) Edinburgh 1967
• MBA Deakin 1986
• Manufacturing
• Logistics, production, engineering including
  maintenance, production eng, test eng, QA
• Design
• Hardware, software projects. Business support
• Consulting/Project Management

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ERICSSON

• Headquarters in Stockholm, Sweden
• Currently employs 60,000 people in 140 countries
• Largest global supplier of mobile systems
• 40 of total traffic through Ericsson systems
• Est. 2004 sales A25bn
• In Australia
• Main customers Telstra, Vodafone, Hutchison
• Regional support for Asia Pacific region
• Until recently, major design centre

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Todays Lecture Topics

• Definitions Engineering Design, the Electronic
  Engineering Design Process
• Requirements for effective electronic design
  activity
• The Electronic Design Process
• The skills required
• The Systems Approach to electronic design

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Engineering Design a definition

• Engineering design is a process of devising a
  system, component, or a process to meet desired
  needs.
• It is a decision-making process (often
  iterative), in which the basic sciences,
  mathematics and engineering sciences are applied
  to convert resources optimally to meet a stated
  objective.
• Among the fundamental elements of the design
  process are the establishment of objectives and
  criteria, synthesis, analysis, construction,
  testing, and evaluation.

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The Electronic Engineering Design Process

• The electronic engineering design process is a
  creative activity where knowledge and resources
  are used to solve problems and meet performance
  objectives.

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Requirements for effective electronic design
activity

• An understanding of the problems to be addressed
  and the settings in which they arise
• A knowledge of the field of electronics and the
  current trends
• A knowledge of the available resources
• An insight into problem-solving strategies
• A thorough understanding of the benefits to, or
  the limitations on the design process, occurring
  in each of the above

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The Electronic Engineering Design Process

• The electronic engineering design process is a
  highly complex task, with many different
  solutions.
• Due to this, and the continuing rapid growth of
  electronics technology, circuit designs are
  constantly changing.
• It is impossible to categorise a few specific
  circuit design techniques which will satisfy all
  the requirements of a practising electronics
  engineer - therefore

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The Electronic Engineering Design Process

• Therefore, when studying the electronic design
  process, students must come to an understanding
  of
• general design principles
• the methods by which these principles can be
  linked to specific design applications.

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Electronic Engineering Design Skills

• In order to become proficient in electronics
  design, the engineer must be able to draw on
• A fundamental understanding of the design
  processes that will be associated with a broad
  range of decision making choices regarding all
  aspects of the circuit production.
• A sufficient background in physical electronics
  to understand the operation of different building
  block devices and to appreciate the inherent
  design opportunities and constraints associated
  with a variety of elements and technologies.

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Electronic Engineering Design Skills

• An understanding of the links that develop
  between device physics, the operation of single
  (discrete) devices, and complex ICs that make use
  of many devices in integrated form.
• As new technologies emerge, this understanding
  of hierarchical relationships enables the
  designer to maintain a co-ordinated framework for
  the available design elements and the ways in
  which they relate.

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Electronic Engineering Design Skills

• 4. An insight into the simplifying models that
  are used in the design process and the regions
  over which these models are valid and invalid.
• 5. The mastery of the analytical and graphical
  methods of circuit design that provide a
  foundation for the selection of design
  strategies, evaluation of alternatives, and
  effective interaction with CAD systems no matter
  what type of implementation strategy is adopted.

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Electronic Engineering Design Skills

• An appreciation of the realistic experimental
  nature of electronics.
• An orientation towards the use of computer
  support for the design and manufacture of
  electronic systems.
• A systems management approach to the design task.
  

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The Systems Approach to Electronic Design

• When undertaking the design of an electronic
  system, the designer is usually exposed to a
  number of varied, and often opposing objectives.
• For example, in most cases a number of technical
  objectives must be considered, the fulfillment of
  which can often require considerable effort and
  creativity.
• At the same time, production costs, reliability
  and serviceability are often major
  considerations.
• To achieve a successful outcome, the designer
  must take a systems approach to the circuit
  design, and attempt to merge the numerous
  objectives.

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The Systems Approach to Electronic Design
Source Mitchell Mitchell, Introduction to
Electronics Design
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Electronic Design Process some practical
insights

• Reasons for design the triggers
• Structure of the product hardware
• Functional roles in design
• Features of the design process
• Features of the manufacturing process
• Testing issues in design and in production

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ERICSSON

• Headquarters in Stockholm, Sweden
• Currently employs 60,000 people in 140 countries
• Largest global supplier of mobile systems
• 40 of total traffic through Ericsson systems
• Est. 2004 sales A25bn
• In Australia
• Main customers Telstra, Vodafone, Hutchison
• Regional support for Asia Pacific region
• Until recently, major design centre

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Reasons for Design

• New technology generation
• New component technology
• New production technology
• Need for product enhancements
• Priority determined by urgency
• Highest priority redesign now, retrofit
• Non-urgent redesign for next product release

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Reasons for Design

• Market demands
• New features to match/beat competition
• Reduce physical size of product (shoe box).
• Local adaptation of global design

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Physical Structure of Product

• Within the network, exchanges, base stations
  consisting of cabinets
• Within the exchange - cabinets, sub-systems and
  magazines
• Sub-system functions, printed board assemblies
  and backplanes
• On the pba, printed circuit boards, discrete
  components, ICs, ASICs

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Functional Roles in Design

• Systems Engineers
• PCB, PBA, ASIC designers
• Test Engineers
• Input from Service and Production areas
• Project Managers

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Design Process Features

• Usually multinational
• Strict design rules
• Computer design tools (CAD/CAM)
• Approved components
• Industrialisation service and production
• QUALITY design reviews, inspections, audits

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Manufacturing Process Features

• Multinational - co-operation, standards
• PCB PTH, multilayer
• PBA assembly
• Automatic insertion for axial-lead and ICs
• SMT (surface mount technology)
• Manual or robotic assembly for odd shape
  components
• Automatic wire wrap and test
• Electrostatic discharge precautions

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Testing Process

• Component testing (reducing)
• Visual inspection of assemblies
• In Circuit Testing (ICT)
• PBA functional test go/nogo, fault-finding
• Magazine test
• System Test test models (pre-delivery)
• Also for design testing
• ASICs (usually overseas test facilities)
• Simulated Test Environment (STE)

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Next week

• Invariably, the Electronic Systems Design is
  applied in a project environment.
• Next week, we will look at whats involved in
  managing such projects.
• Thanks for your attention