analogue (English spelling)computing dictionary

<electronics> A description of a continuously variable signal or a circuit or device designed to handle such signals. The opposite is "discrete" or "digital".

Analogue circuits are much harder to design and analyse than digital ones because the designer must take into account effects such as the gain, linearity and power handling of components, the resistance, capacitance and inductance of PCB tracks, wires and connectors, interference between signals, power supply stability and more. A digital circuit design, especially for high switching speeds, must also take these factors into account if it is to work reliably, but they are usually less critical because most digital components will function correctly within a range of parameters whereas such variations will corrupt the outputs of an analogue circuit.

See also: analogue computer.

American spelling: analog

(01 Mar 1995)

analogue (English spelling)medical dictionary

1. One of two organs or parts in different species of animals or plants which differ in structure or development but are similar in function.

2. A compound that is structurally similar to another but is not necessarily an isomer (e.g., 5-fluorouracil is an analog of thymine); analog's are often used to block enzymatic reactions by combining with enzymes (e.g., isopropyl thiogalactoside vs. Lactose).

Origin: G. Analogos, proportionate

American spelling: analog

(10 Feb 2009)

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