Analogue and digital signals (AQA A-Level Physics): Flashcards
📚Flashcards
Practise the cards
10 cards from this deck
ShowHide
Practise the cards
10 cards from this deck
Nature of analogue signals
Nature of analogue signals
Continuous; can take any value within a range
Nature of digital signals
Nature of digital signals
Discrete, only two values: or (binary)
ADC full form
ADC full form
Analogue-to-Digital Converter
Three steps in ADC process
Three steps in ADC process
Sampling, Quantisation, Encoding
Nyquist rate (min. sampling rate)
Nyquist rate (min. sampling rate)
Twice the highest frequency in the analogue signal
Definition of a byte
Definition of a byte
A group of 8 bits
How ADC resolution increases
How ADC resolution increases
With the number of bits used for each sample
Why digital signals less affected by noise
Why digital signals less affected by noise
Noise must be very strong to alter distinct on/off states
Regenerators vs Repeaters
Regenerators vs Repeaters
Regenerators filter noise; repeaters amplify all (incl. noise)
Parallel-to-serial converter function
Parallel-to-serial converter function
Converts parallel data to serial stream (one bit after another)