Lecture 12

Question 1

What are the main differences between analogue and digital quantities?

Answer 1

Analogue - continuous values, analogue systems deal with higher power
Digital - discrete values (typically 0 and 1), digital systems process, store and transmit data more efficiently.

Question 2

What are the two possible states in digital systems?

Answer 2

0 and 1, on and off, open and closed, high and low. These two states are represented by two voltage levels.

Question 3

What are the advantages of integrated circuits?

Answer 3

Integrated circuits (ICs) have small size, high reliability, low cost and low power consumption.

Question 4

What are the three basic logic operations used in digital circuits?

Answer 4

AND, OR and NOT.

Question 5

What are the key characteristics of digital waveforms?

Answer 5

They are composed of a series of pulses (pulse trains), can be periodic or non-periodic, characterised by time period (T) and frequency (f), duty cycle - ratio of pulse width to time period.

Question 6

What is the purpose of timing diagrams in digital electronics?

Answer 6

Timing diagrams show the relationship between two or more digital waveforms, all synchronised with a basic timing waveform called the CLOCK.