=== Noise Simulation Syntax === To run noise simulation - ad the following line to circuit file (spice format): ''.noise V(a,b) Dev stepmode points fromF toF'' * V(a,b) - output to measure noise at - nodes a to b; possible form: V(a) is the same as V(a,0) * Dev - device which is considered as input * stepmode - [o{ctave}, d{ecade}, lin, ti{mes}, step, by, +, *] * points - number of points (depends on stepmode) * fromF - lowest frequency * toF - highest frequency It will calculate noise power density between output nodes "a" and "b" and equivalent power at input device "Dev" using "stepmode" making "points" in frequency range "fromF"-"toF" Example: '' .noise v(3) V1 oct 5 10 10K '' - calcualate spectral noise density at node "3" and reduce it to input device V1 making 5 points per octave in frequency range from 10HZ to 10KHZ '' .noise V(10,12) I1 dec 2 10K 10MEG'' - calcualate spectral noise density between nodes 10 and 12 and reduce it to input device I1 making 2 points per decade in frequency range from 10KHZ to 10MHZ == Output == Usually simulators also support ''.print noise'' statement. Now it is not implemented yet. Currently output contains: '' Freq inoise_density onoise_density '' Also - at the end of the frequency range total power over the range s integrated: '' inoise_total onoise_total ''