Zero-Level Drift

The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

Drift, Zero-Level

 

in an analog computer, a slow change in the voltage at the output of the computing amplifier (which is taken as zero) in the absence of an input signal. It is caused by variations in the parameters of the amplifier elements caused by variations in the temperature of the surrounding medium and in pressure and humidity, by aging of the elements, and by instability of the power-supply voltage. Zero-level drift leads to errors in the operations performed by the amplifiers. Automatic compensation, correction, and stabilization are generally used to reduce zero-level drift or to eliminate its effects.

REFERENCE

Chesnokov, A. A. Reshaiushchie usiliteli, 2nd ed. Moscow, 1969.
The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.