Lock-in amplifier

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Notion

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Science and technology

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What Wikipedia says

A lock-in amplifier is a type of amplifier that can extract a signal with a known carrier wave from an extremely noisy environment. Depending on the dynamic reserve of the instrument, signals up to a million times smaller than noise components, potentially fairly close by in frequency, can still be reliably detected.

Excerpt from the Wikipedia article “Lock-in amplifier”, under the CC BY-SA 4.0 license. Read the article on Wikipedia

Image: RMBurdett, CC BY 3.0, via Wikimedia Commons.