added in quadrature

Verb

add in quadrature (third-person singular simple present adds in quadrature, present participle adding in quadrature, simple past and past participle added in quadrature)

1. To combine the magnitude of two uncorrelated signals, usually noise or errors, by taking the square root of the sum of the squares.
   • The derived expression for the g‐r noise consists of a thermal component and a background component which add in quadrature.1982, “Theory of generation‐recombination noise in intrinsic photoconductors”, in Journal of Applied Physics, volume 53, →DOI