Introduction to digital system
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This document discusses numerical data representation and digital and analog systems. It notes that there are two types of numerical representation: analog and digital. It also describes two types of systems: analog systems, which use analog representations, and digital systems, which use digital representations. The document outlines several advantages of digital systems, such as being easier to design, having greater accuracy and precision, and being less affected by noise. It also notes a limitation of digital systems is that the real world is analog. To take advantage of digital techniques, analog inputs must be converted to digital forms, operations performed digitally, and digital outputs converted back to analog forms.
Introduction to digital system
- 1. Numerical Data Representation Two ways of numerical data representation: Analog Digital Discussed on first lecture
- 2. Systems Two types of system: Analog system: An analog system is a combination of devices which are designed to manipulate logical information that are represented in a analog form Digital system: A digital system is combination of devices which are designed to manipulate logical information that are represented in a digital form
- 3. Advantages of Digital Systems Digital systems are easier to design: As the circuits are mainly switching circuits, where exact values of voltage or current in not important. But only the range( HIGH or LOW) in which a specific voltage falls is important. Information storage is easy Accuracy and precisions are greater: Digital systems can handle as many digits of precisions as you need simply by adding more switching circuits. In Analog system precision is limited to only three or four digits. Operation can be programmed: digital system operations can be programmed more easily as the variety and complexity of the problem is limited compared to analog system operations.
- 4. Advantages of Digital Systems Digital circuits are less affected by noise: As the exact value of voltage or current is not so important here, therefore these systems are less affected by noise Smaller in size compared to the analog circuits.
- 5. Limitation of Digital Systems The world is analog
- 6. Then how to take the advantages of digital techniques
- 7. How to 1. Convert the real world analog inputs to digital forms 2. Process or perform operation of digital information 3. Convert the digital output back to the real world analog form
- 8. Example of temperature control system
- 9. MD. Shakhawat Hossain Student of Computer Science & Engineering Dept. University of Rajshahi
- 10. MD. Shakhawat Hossain Student of Computer Science & Engineering Dept. University of Rajshahi