Table of Contents

1. Analogue and digital signals 1.1 Converting binary to decimal 1.2 Storing information 1.3 Information stored on CDs 1.4 Calculating pit depth 1.5 Solving Problems 1.6 The pros and cons of digital 1.7 Implications for society 2. The charge-coupled device 2.1 Capacitance 2.2 Structure of a CCD 2.3 Pixel charging 2.4 Digitizing an image 2.5 Quantum efficiency 2.6 Magnification 2.7 CCD Resolution 2.8 Quality of CCD images 2.9 Uses of a CCD 2.10 Retrieving CCD images 2.11 Solving problems 3. Electronics 3.1 The operational amplifier 3.2 Amplifiers 3.3 Deriving Gain 3. Two source interference 3.4 Use as a comparator 3.5 The Schmitt Trigger 3.6 Solving problems 4. The mobile phone 4.1 Cells 4.2 Cellular exchange and PSTN 4.3 Use of multimedia 4.4 Impact of mobile phones 5. Common exam mistakes 6. Questions 7. Answers

About the Author

Hugh Duncan studied astronomy at London University and then gained a teaching certificate in physics, science and mathematics at the University of Kent. He has many years' teaching experience and has taught IB Physics at the International School of Nice, France since 1991