A- Level Physics- Analog and Digital Signals, Best Maths and Physics Tutor in UK

A-Level Physics-  Analog and Digital Signals (Best Maths and Physics Tutor in UK)

We are the best Maths and Physics tutor center in UK. Today we will discuss a very important topic in Physics which is Analog and Digital signals.

An analog signal is any continuous signal for which the time-varying feature of the signal represents some other time-varying quantity. A digital signal is a signal that represents data as a sequence of discrete values.

 Differences between Analog and Digital signals

1. Analog signals are continuous, digital signals are discontinuous.

2. Digital signals have two states, high and low.

What is a bit?

A bit is a basic information unit that can either be 1 or 0. A byte is a unit of digital information. The byte consists of 8 bits. 

Define the sensitivity, resolution, and response time of sensors that produce an analog output. 

Sensitivity: Change in output quantity/ unit change in input quantity. 

Resolution: Smallest change in the quantity that can be measured, given as a ratio of the change to the value measured.

Response time: The time is taken to completely respond to a change in input. 

How does an analog to digital converter work? 

Sampling: Analog signal passes into a sampling gate which samples signal value in equal intervals determined by an external clock pulse. Each decimal sampled value is converted into binary form and the corresponding digital signal is sent. 

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