LXIX. An electrical circuit for harmonic analysis and other calculations
T B Rymer, C.C. Butler · The London Edinburgh and Dublin Philosophical Magazine and Journal of Science · 1944
A D.C. electrical circuit suitable for the evaluation of certain arithmetical expressions has been devised, and its use for harmonic analysis is described. Apart from a potentiometer and mirror galvanometer, only standard radio components are used, and thus the instrument is inexpensive and simple to construct, while its average error is less than 0·1 per cent, of the largest quantity involved. Modifications of the basic circuit are described.