The Allan variance (AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after David W. Allan and expressed mathematically as σ y 2 ( τ ) {\displaystyle \sigma _{y}^{2}(\tau )} .
The Allan variance (AVAR), also known as two-sample variance, is a measure of frequency stability in clocks, oscillators and amplifiers. It is named after David W. Allan and expressed mathematically as σ y 2 ( τ ) {\displaystyle \sigma _{y}^{2}(\tau )} .
Source: Wikipedia "Allan variance" · CC BY-SA 4.0
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