Computer Aided Electronic Design. 20. E. Computer Aided Printed Circuit Board
Design. 20. F. Electronic Simulation. 20. G. CAD Application Software. 6 ...
Computer Aided Design & Drafting
Computer Aided Design & Drafting
Unit Value
1.0 (typically 60 hours for a full-time course)
This standard unit is primarily used by the Technical Institutes when operating the following Courses : Diploma in Computer and Communications Engineering (0304)
August 1995
Vocational Training Council, Hong Kong
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Computer Aided Design & Drafting Preface 1.
In teaching this unit, staff should devise guidance and supervision process to facilitate achievement of the principal objectives. 2. To gain a pass grade, students are expected to achieve all the learning outcomes expressed by the principal objectives. ___________________________________________________________________________ Summary of aims 1. To appreciate the technology of CAD. 2. To get accustomed to using CAD system. 3. To develop the learning skill of CAD system. 4. To use CAD software in Electronic design, Electronic simulation and Drafting. ___________________________________________________________________________ Assessment scheme and teaching strategies 1.
Assessment should be in the form of practical assignments which are related to the course objectives. 2. Lectures and assignment work should be the principal teaching method used for this unit. 3. Practical examples should be used whenever possible; industrial visits and suitable audio visual aids could be used to support the teaching process. ___________________________________________________________________________ Table of Contents Section Topic Contents Learning Support Time (%) A Introduction to CAD Systems 4 B Fundamental of Computer Graphics 10 C Computer Aided Drafting 20 D Computer Aided Electronic Design 20 E Computer Aided Printed Circuit Board Design 20 F Electronic Simulation 20 G CAD Application Software 6 ___________________________________________________________________________ Special Notes
The effective coverage of this unit requires significant development of college-devised software or acquisition of commercial software packages, and a need for continual up-dating. ___________________________________________________________________________
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Computer Aided Design & Drafting
Section Principal Objectives plus indicative content or Specific Objectives ___________________________________________________________________________
A.
Introduction to CAD Systems 1.
CAD System Hardware - Identify and describe the function of the following hardware devices in a CAD system : Central Processing Unit (CPU), Memory Mass storage device : Hard disk, floppy disk, magnetic tape. Input devices : keyboard, mouse, graphic tablet, trackball, stylus. Output devices: video display unit, printer, plotter. 2. CAD system software - Describe the function of the following software required for a CAD system : Operating system, driver program for hardware devices, application program, library. ___________________________________________________________________________
B.
Fundamental of Computer Graphics 3.
Basic drawing elements - Identify and describe the properties of basic drawing elements : line, circle, polygon.
4.
Manipulation of drawing elements - Demonstrate the technique to manipulate the drawing elements : move, copy, delete, zoom, mirror, rotate, drag, rubber-banding, area filling, area hatching.
5.
Graphics database and library - Describe the functon of graphics database and library. ___________________________________________________________________________
C.
Computer Aided Drafting 6.
Coordinate systems - Describe the different types of coordinate systems : user coordination system, world coordinate system, absoluten and relative coordinates.
7.
Text and Dimensioning - Demonstrate the use of different type of text and dimensioning : Font and line type, size, style, text justification, linear dimensioning
and angular dimensioning. 8.
Layering - Describe the use and advantages of layering.
9.
Special drawing features - Demonstrate the use of special drawing features : grid, view control.
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Computer Aided Design & Drafting 10.
Projection - Identify a drawing using different projections : orthographic, isometric.
11.
2D & 3D drafting - Produce 2D and 3D drawings with reference to a given drawing specification.
12.
Introduction to solid modelling and wireframing - Understanding the concepts and application of solid modelling and wireframing. ___________________________________________________________________________
D.
Computer Aided Electronic Design 13. Electronic logical parts - Describe the properties of an electronic logical part : part name, part number, part reference designator, pin definition. 14.
Electronic parts library - Understand the structure of an electronic parts library and create a user-defined library.
15.
Schematic capture - Demonstrate the creation of an electronic schematic diagram : i) Electronic parts placement ii) Interconnection of electronic parts with wires and bus iii) Editing
16.
Utility - Demonstrate the use of program utilities : i) Schematic design rule check ii) Schematic annotation iii) Partlist generation iv) Netlist generation ___________________________________________________________________________
E.
F.
Computer Aided Printed Circuit Board Design 17.
Physical components - Identify the physical components on a PCB : Integrated Circuits, resistor, capacitor, edge connector, jumpers, metal trace, pads.
18.
PCB design - Demonstrate the design of a PCB from a given electronic schematic circuit : i) PCB layout ii) Components placement iii) Parameter definition : number of layers, trace width, pad diameter, tolerance, clearance between traces. iv) Routing v) PCB design rule check
19.
Artwork Master generation - Describe the use of following artwork masters in the manufacture of a PCB : silk screen, solder mask, pad master, drill plot.
Electronic Simulation Page 4 of 5
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Computer Aided Design & Drafting
20.
Types of Simulation - Describe the different types of simulation : logic simulation, circuit simulation, fault simulation.
21.
Electronic Simulation - Demonstrate the simulation of a given electronic schematic circuit : i) Circuit elements modelling ii) Circuit description : text format and graphical format iii) Circuit analysis iv) Result output : text format and graphical format ___________________________________________________________________________
G.
CAD Application Software 22.
Typical CAD software appreciation and evaluation : - Computer-aided drafting software, electronic design automation software, electronic logic and circuit simulation software, computer-aided presentation software. ___________________________________________________________________________
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