Analog

Analog is a type of communication technology which uses continuous physical signals or variable physical attributes to transmit and interpret information. The use of analog technologies preceded the more commonly used digital technology, which uses binary code to store and send information.

An analog signal is constantly changing in its amplitude, frequency, or other measurable signal attributes. Examples of an analog signal are sound waves, light waves, and electrical signals, which all can be converted into digital information.

Analog devices are used to process the input from analog signals. These devices serve as an interface between the analog and digital worlds. Examples of analog devices are switches, resistors, transistors, capacitors, transformers, amplifiers, and oscillators.

Analog devices are used in a variety of technology fields, including telecommunications, audio, video, robotics, engineering, and medical devices. They play an important role in everyday devices such as phones, televisions, radios, and computers.

Analog technology can be advantageous in some cases, particularly in the transmission of data over copper wire, as analog signals are more resistant to interference than digital signals and can travel farther with less degradation. Additionally, analog devices are generally cheaper and easier to use than digital devices.

However, analog devices have their limitations. Analog signals are prone to noise, distortion, and signal fading, and analog transmission speed and accuracy is limited. Moreover, analog technologies are largely being replaced by more advanced digital technologies, as the latter are more efficient and require less signal processing.