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# phase noise

• #### Re: PSS, PNOISE and Transient Noise

Hello, Thanks for your answers. Relating to point 4, so if I choose either transient noise analysis or transient analysis without checking the transient noise analysis, the result of the Phase-Noise/Jitter calculations will be the same on the two cases, right ? Relating to your question in point 5, I...
Posted to Custom IC Design (Forum) by pcardoso73 on Mon, Apr 11 2011
• #### PSS, PNOISE and Transient Noise

Hi all, I have several questions which i will describe by topics. All the circuit design is made in Candence using Spectre. 1 - As transient noise introduces noise in the transient simulation, I export the data to Matlab to perform the Jitter (RMS and Peak-to-Peak) calculations. How can I do this in...
Posted to Custom IC Design (Forum) by pcardoso73 on Tue, Apr 5 2011
• #### PNOISE and Transient Noise

Hello all, I am doing a Phase Noise analysis, which I would like to convert to jitter. 1 - I am using a tran analysis+ PSS+ PNOISE and I get the Phase Noise out of this. How can I get the jitter ? 2 - The transient noise should be enable during the tran simulation , and use those data on PSS+PNOISE ...
Posted to Custom IC Design (Forum) by pcardoso73 on Thu, Feb 24 2011
• #### Unable to plot phase noise

Hi, After running pnoise: jitter analysis, I wanted to plot the phase noise by choosing: Direct Plot Form => pnoise jitter => Phase Noise => dBc => Plot I got some error messages shown as follow: *Error* flip: can't handle flip(nil) *Error* flip: can't handle flip(nil) *Error* flip...
Posted to Custom IC Design (Forum) by sebastion on Wed, Jul 21 2010
• #### difference between the two phase noise functions in Direct Plot Form?

Hi, I am trying to simulate the phase noise of a 25GHz LC oscillator using pss (flexible balance) and pnoise analysis. In the Direct Plot Form, there are two different Phase Noise options: 1) Analysis: pnoise Function:Phase Noise 2) Analysis: pnoise jitter Function: Phase Noise The two above give different...
Posted to RF Design (Forum) by Soner on Sat, May 8 2010
• #### how to capture 1/f noise in spectre

Hello I am designing a down-converter and need to capture 1/f noise corner. I need to find a way to capture the corner automatically after simulation (PSS and Pnoise) instead of using rulers to find it. Does anyone know how to grab it automatically? Thanks much in advance.
Posted to RF Design (Forum) by pureck on Fri, Apr 9 2010
• #### pss+pnoise analysis failure in Monte Carlo Simulation

Hi, I am trying to run a Monte Carlo simulation of a 25GHz LC-VCO (vco followed by an ac-coupled buffer) for phase noise (mmsim-7.11, pss (harmonic balance) and pnoise). When I try a single run (no variability), the simulation finishes successfully without any errors or warnings. When I try running a...
Posted to RF Design (Forum) by Soner on Wed, Jan 27 2010
• #### Why Spectre noise-aware PLL simulation give huge PSF output and taking long time?

we are trying to follow the spectre RF noise-aware PLL sim flow. Using MMSIM71 and IC5141_USR5(with latest hotfix), and the PLL is running at 2.5GHz. It goes well at the beginning, the divider ,CP and VCO model was extracted sucessfully, though we can not view it since the model was encrypted. We don't...
Posted to RF Design (Forum) by bluestatic on Fri, Sep 18 2009
• #### positive phase noise

I simulated the phase noise of an LC VCO. The phase noise at very low offset is positive. For example, the phase noise is +13.2 dBc/Hz at 100 Hz offset whilst the phase noise at 1 MHz offset is -100 dBc/Hz. The carrier frequency is 5 GHz. Should phase noise be negative? If the component at 5.0000001...
Posted to RF Design (Forum) by Andy Liu on Thu, Jun 11 2009
• #### half harmonic frequency in PSS analysis

I am designing an LC based voltage control oscillator. I want to simulate phase noise of my oscillator, but, I ALWAYS got a very bad phase noise performance (for example, -60 dBc/Hz @ 1 MHz offset, compared to my expectation -110 dBc/Hz). The reason is that in the periodic steady state analysis (PSS...
Posted to Custom IC Design (Forum) by Andy Liu on Thu, Apr 30 2009
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