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Harmonic Oscillator at the Specified Frequency (Tone N) with Phase Noise: OSC_W_PH_NOISE



OSC_W_PH_NOISE models a harmonic oscillator at the specified frequency Fc, with the available power Pwr, with the phase noise specified by a table of {FREQUENCY, Phase Noise}. The noise sideband is symmetric around Fc.


Name Description Unit Type Default
ID Element ID   V1
Z Termination Impedance Resistance 50 ohm
Fc Oscillation Frequency Frequency 1x109 Hz
Pwr Available Power dB power 10 dBm
Ang Relative angle of the excitation Angle 0
Tone Tone Number for the signal   1
FREQUENCY Frequency Table Frequency {1e4, 1e5, 1e6, 1e7, 1e8} Hz
Phase Noise L(f) Phase Noise in dB/Hz dB/Hz {-75, -100, -120, -141, -145}
Temp Temperature for thermal noise calculation Temperature 290 K
METHOD Linear or Spline Interpolation in x=log10f   Linear
NHarm Maximum number of harmonics for this tone. Value of zero causes this parameter to be ignored.   0
NSamp Oversampling factor   1

Parameter Details

NHarm & NSamp. Specify a value of zero to indicate that these parameters do not override the values specified for the Tone X Harmonics and Tone X Over sample in the project or document harmonic balance settings. (Choose Options > Default Circuit Options and click the AWR Sim tab.) This only applies when the Tone parameter is set to 1, 2, or 3 for the element. An error is issued if these parameters are set to zero for a source with Tone equal to 4 or more.

Implementation Details

OSC_W_PH_NOISE consists of a sinusoidal voltage source with the series resistance Z, and the table-specified noise source I_N_TAB connected as shown in the previous figure. The values of phase noise L'(f) (in dB) are converted into the normalized spectral density S(f) according to the following expression:

See I_N_TAB for further details on the interpolation of S(f).


This element does not have an assigned layout cell. You can assign artwork cells to any element. See “Assigning Artwork Cells to Layout of Schematic Elements” for details.

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