signal where the time-varying feature is an analogous representation of some other time-varying quantity
An analog signal is a continuous representation of information where the signal itself changes in a way that directly mirrors changes in whatever it's measuring—like how the groove patterns on a vinyl record directly correspond to the sound waves they reproduce. Analog signals matter because they can capture and transmit information smoothly and naturally, though they can be more susceptible to interference and degradation compared to other signal types.
AI-generated from the Wikipedia summary — may contain errors.
An analog signal (American English) or analogue signal (British and Commonwealth English) is any signal, typically a continuous-time signal, representing some other quantity, i.e., analogous to another quantity. For example, in an analog audio signal, the instantaneous signal voltage varies in a manner analogous to the pressure of the sound waves.
In contrast, a digital signal represents the original time-varying quantity as a sampled sequence of quantized numeric values, typically but not necessarily in the form of a binary value. Digital sampling imposes some bandwidth and dynamic range constraints on the representation and adds quantization noise.
Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).