Drift (communications engineering)

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In telecommunications, drift is a relatively slow change in a value or property of a system or facility.


For example there is the frequency drift ( frequency distortion ) and the drift of the output voltage. The drift can go in one direction, but it can also lead back in the direction of the original state, it can be cyclical, it can depend on ambient conditions ( temperature , humidity ) or on the aging of the components.


The drift is usually undesirable. In particular, drift must be taken into account when calibrating devices (e.g. when determining a zero point). Undesired drift shifts this point. The closer the measurement is to the zero point, the greater the effect (e.g. with large enlargements or amplifications). In this context, one also speaks of zero point drift . This can be reduced by using a chopper amplifier .

Temperature drift

Under temperature drift ( English: temperature drift ) is the unwanted change of a physical size by changing the (ambient) temperature .


  • Joachim Goerth: Introduction to communications technology. BG Teubner Verlag, Stuttgart 1982, ISBN 978-3-519-00091-4 .
  • Dieter Stoll: Circuits in communications engineering. Friedrich Vieweg & Sohn Verlag, Braunschweig 1988, ISBN 978-3-663-00131-7 .
  • Karl Steinbuch, Werner Rupprecht: communications engineering. An introductory presentation, 2nd edition, Springer Verlag, Berlin / Heidelberg 1973.
  • Otger Neufang: Lexicon of Electronics. Friedrich Vieweg & Sohn Verlag, Braunschweig 1983, ISBN 978-3-528-04099-4 .


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