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Photonics Dictionary

analog-to-analog

Analog-to-analog (AA) refers to the process or system that involves the conversion or transmission of analog signals from one form to another, without converting them into digital signals at any point. This can involve a variety of transformations, including amplification, filtering, modulation, or other signal processing techniques applied to analog signals.

Here are some examples to illustrate the concept:

Amplification: An analog signal, such as a sound wave picked up by a microphone, can be amplified to a higher power level using an analog amplifier.

Filtering: Analog filters can be used to remove unwanted frequencies from an analog signal, such as using a low-pass filter to remove high-frequency noise from an audio signal.

Modulation: Analog modulation involves changing the characteristics of a carrier wave (such as amplitude, frequency, or phase) to encode information from an analog signal. This is used in analog broadcasting like AM and FM radio.

Mixing: Combining two analog signals to produce a new signal, as in audio mixing where multiple audio tracks are combined into a single output.

In an A-to-A system, the integrity of the original analog signal is preserved throughout the process, as it is never digitized. This can be crucial in applications where maintaining the continuous nature of the analog signal is important for fidelity and accuracy.
 

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