Analog-to-Digital Conversion › lesson 01 of 100 · Beginner

Understand Analog Signals

This lesson is the first in the Analog-to-Digital Conversion course, and after completing it, you will be able to recognize continuous signal variations over time. You will understand the fundamental concept of analog signals and how they change over time.

Recognize continuous signal variations over time.

Consider a sound wave from a guitar string: as the string vibrates, it creates a continuous variation in air pressure over time, which our ears perceive as sound. This is an example of an analog signal, which is a continuous signal that varies over time. Analog signals can be found in many natural phenomena, such as light, temperature, and pressure.

Analog signals have a range of values, or amplitudes, and can change smoothly over time. This means that at any given moment, the signal can have any value within its range, and the value can change gradually or abruptly.

The key characteristic of analog signals is that they are continuous, meaning they have no breaks or gaps in their variation over time. This is in contrast to digital signals, which are discrete and have distinct values.

Примеры

• A light sensor measuring the intensity of sunlightThe sensor would produce an analog signal that varies continuously over time as the sunlight intensity changes.
• A thermometer measuring the temperature of a roomThe thermometer would produce an analog signal that varies continuously over time as the room temperature changes.
• A microphone measuring the sound pressure of a voiceThe microphone would produce an analog signal that varies continuously over time as the sound pressure changes.

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