Unit 1
- Created by: BethScott
- Created on: 13-04-15 19:33
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- Unit 1
- Bit
- Binary digit
- 0 or 1
- Byte
- A group of 8 bits
- 01010101
- Digital data
- Can be represented by discrete bit patterns, can only take a finite number of definite fixed values
- e.g. number of people in a room, sweets in a tin etc.
- Digital to analogue converter (DAC)
- A device for converting digital signals from the computer into analogue data
- Can be represented by discrete bit patterns, can only take a finite number of definite fixed values
- Analogue data
- A continuous varying signal, represented using an infinite scale of values
- e.g. sound
- Key characteristic
- If you have any two values, there is always a value between
- To be stored and manipulated into a computer it must be converted to a digital representation
- The height of the waveforms can be sampled at regular time intervals and is represented by a binary code in order to digitise the data
- Analogue to digital converter (ADC or Digitiser)
- A device which converts analogue signals into digital ones for subsequent computer processing
- The height of the waveforms can be sampled at regular time intervals and is represented by a binary code in order to digitise the data
- A continuous varying signal, represented using an infinite scale of values
- Bit
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