analogue and digital signals

what is a analogue signal

a analogue signal is a signal that has different frequencies and amplitudes

what is a digital signal

a digital signal is a signal that uses binary or bitswhich are 0 and 1 and only has one amplitude which is 1

what is a ADC and what does it do?

a ADC is a analogue to digital converter it takes a analogue signal looks at the amount of voltage and converts it into binary (bits) so that a computer can understand.

what is sampling

sampling is measuring the value of an analogue signal at regular intervals and each measurement is called a sample. for example taking photos of a moving object the smoother the video same for sampling the more samples the better the digital signal

properties of analogue signal

they are continuous and the value can be within of any range, they also have different amplitudes and frequency’s.

properties of digital signals

they could be a volatage that can be high or low 0=low 1=high

how can a digital signal carry info

they can be transmitted through fiber optics and information or stored as computer memory

advantages of digital signals

they can carry more info in the same bandwidth as they use 0s and 1s. Analogue is like an old tape recording, while digital is like an MP3 file — the same sound, but much smaller, so more fits into the same space.

they can pick up and filter out interference easier because the computer recognizes 0s and 1s very easily

disadvantages of digital signals

the sampling rate can affect the quality of the signal which means there are fewer samples taken per second so the signal loses detail and quality gets affected and it also takes time processing more data so there are delays when transmitting or processing the signal