An aid to the use of averaging computers in experimental investigations.

Abstract

The input analogue-to-digital converters of currently available averaging computers have a finite resolution. It is shown that in the presence of noise of 1/f character, this finite resolution sets an upper limit to the possible improvement of signal-to-noise ratio. This limit can be exceeded only if the d.c. level of the input signal is periodically reset. The performance of an electronic circuit designed to do this automatically is described.