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Noise correlation simulation in pnoise

radiowaves

 Hi,

1. I am using IC6.1.6-64b.500.1 and my simulator version is 10.1.1.296.isr18 64 bit

2. I am simulating a basic downconversion mixer as shown in attached figure. I want to know the correlation between noise at
RF (red) and noise at IF (blue). I tried to follow the following article:
www.cadence.com/.../tdnoise.pdf

In page 7, it uses noisetype=correlations. But this option is not available in this version. How shall I find my required  correlation.

I shall highly appreciate if you provide me an appnote or the steps.

Parents
  • Pnoise correlations is a byproduct of the pnoise modulated simulation. Pnoise modulated measurement is derived from the results of two analyses: pnoise and pnoise correlations. This means pnoise modulated results are only available when using the ADE GUI. (i.e. cannot plot the results in spectre standalone). “Correlations” was removed from the ADE GUI for several reasons - one being not many folks used it - it's mainly used to calculate pnoise modulation results. But pnoise correlations is still available in spectre standalone.

    Selecting noisetype=correlations correlates the noise at different ports of a multi-port circuit.
    For example, it computes the correlation of noise at different outputs, and the correlation of noise at the input and output of a circuit that exhibits frequency conversion. You can extract equivalent noise sources from these calculations. The parameter “cycles” refers to an array of cycle correlation frequencies when computing noise up- or down-converted to the output of a periodic driven circuit.

    To read more about correlations, see the section on Analyzing Time-varying Noise in the SpectreRF theory chapter . There is a simple example on Calculating Noise Correlation Coefficients and a Cyclostationary Noise Example. Also see the SpectreRF theory manual: http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/spectreRFTheory/spectreRFTheory14.1/chap1.html
Reply
  • Pnoise correlations is a byproduct of the pnoise modulated simulation. Pnoise modulated measurement is derived from the results of two analyses: pnoise and pnoise correlations. This means pnoise modulated results are only available when using the ADE GUI. (i.e. cannot plot the results in spectre standalone). “Correlations” was removed from the ADE GUI for several reasons - one being not many folks used it - it's mainly used to calculate pnoise modulation results. But pnoise correlations is still available in spectre standalone.

    Selecting noisetype=correlations correlates the noise at different ports of a multi-port circuit.
    For example, it computes the correlation of noise at different outputs, and the correlation of noise at the input and output of a circuit that exhibits frequency conversion. You can extract equivalent noise sources from these calculations. The parameter “cycles” refers to an array of cycle correlation frequencies when computing noise up- or down-converted to the output of a periodic driven circuit.

    To read more about correlations, see the section on Analyzing Time-varying Noise in the SpectreRF theory chapter . There is a simple example on Calculating Noise Correlation Coefficients and a Cyclostationary Noise Example. Also see the SpectreRF theory manual: http://support.cadence.com/wps/mypoc/cos?uri=deeplinkmin:DocumentViewer;src=pubs;q=/spectreRFTheory/spectreRFTheory14.1/chap1.html
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