Noise performance

The noise power is the average electrical power that a resistor or other component can give off to other systems due to various sources of noise . As long as all connected devices are at the same temperature, the system is in dynamic equilibrium ; H. the noise power that a component consumes corresponds to the noise power that it emits. ${\displaystyle {\tilde {P}}_{t}}$

The mean temporal noise power results from the integration of the spectral noise power density over the frequency : ${\displaystyle {\tilde {P}}_{t}}$ ${\displaystyle {\tilde {P}}(\nu )}$  ${\displaystyle \nu }$

${\displaystyle {\tilde {P}}_{t}=\int _{0}^{\infty }{\tilde {P}}(\nu )\;d\nu }$

The spectral noise power is made up of the power of the individual noise sources , which are weighted with the transfer function of the system : ${\displaystyle P_{i}(\nu )}$ ${\displaystyle _{i}}$ ${\displaystyle G(\nu )}$

${\displaystyle {\tilde {P}}(\nu )=G(\nu )\cdot \sum _{i}P_{i}(\nu )}$

See also

• Noise voltage

literature

• Hans Lobensommer: Handbook of modern radio technology. Principles, technology, systems and practical applications . Franzis Verlag, Poing 1995, ISBN 3-7723-4262-0 .
• Rudolf Müller: Rauschen (=  semiconductor electronics . Volume 15 ). 2nd, revised and expanded edition. Springer, Berlin a. a. 1990, ISBN 3-540-51145-8 .
• Wilhelm Hille, Otto Schneider, Klaus Großmann: Electrical expertise. Vol. 3: Helmuth Willelms, Dieter Blank, Hans Mohn: communications engineering . BG Teubner, Stuttgart 1982, ISBN 3-519-06807-9 .
• Walter Fischer: Digital television technology in theory and practice. Springer Verlag, Berlin / Heidelberg 2006, ISBN 978-3-540-29203-6 .
• Hans Fricke, Kurt Lamberts, Ernst Patzelt: Basics of electrical communication . BG Teubner Verlag, Stuttgart 1979, ISBN 3-322-94046-2 .

Web links

• The noise voltage and its calculation