1. Chapter 2 Introduction to Digital Concepts

2. Analog Representation Voltage, current, movement

3. Digital Representation Digital watch Digital watch

4. Advantages of Digital Techniques Easer to design. (processing limited values). Easer to design. (processing limited values). Information storage is easy. Information storage is easy. More accuracy. More accuracy. Operation can be programmed. Operation can be programmed. Less affected by noise. Less affected by noise.

5. Limitations of Digital Techniques The real world is mainly analog The real world is mainly analog need to be converted to digital (ADC) need to be converted to digital (ADC) Process the digtal form Process the digtal form Convert the digital output to analog (DAC). Convert the digital output to analog (DAC).

6. Example

7. Digital Number System

8. Representing Binary Quantites

9. Digital Waveform

10. Pulse Types Periodic Pulse Periodic Pulse repeat itself at fixed intervals. repeat itself at fixed intervals. A frequency is the rate at which the waveform repeats A frequency is the rate at which the waveform repeats

11. Pulse Types

12. Non periodic pulse Non periodic pulse Does not repeat itself at fixed intervals. Does not repeat itself at fixed intervals.

13. Example

14. A Digital Waveform Carries Binary Information.

15. Timing Diagram Showing the relationship of all waveforms Showing the relationship of all waveforms

16. Data Transfer Serial Form Serial Form

17. Data Transfer Parallel form Parallel form