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Monte Carlo Analysis

197 Threads found on edaboard.com: Monte Carlo Analysis

hi all! I'm gonna use monte carlo analysis to find standard deviation for input Offset of a latched Comparator using icfb 5.10.41_USR5.90.69. the goal is to plot it against a voltage value called Common Mode Voltage. It is to some extent a parametric monte carlo analysis. But it seams (...)

One question about the Monte Carlo simulation for the bandgap reference circuits

Hi All, I have a question about the Cadence operation for the MC simulation for the BGR. Normally, we can specify a temperature and run the DC analysis of a BGR to get the historgram of Vref at this temperature. However, are we able to run the MC sim with different profiles at different temperatures at the mean time? For example, this is a measur

monte carlo simulation for dac in spectre (cadence)

hi guys im looking forward a way for doing monte carlo simulation for current steering DACs . does any body know any way for doing it in cadence .

MNA-MAT : An easy-to-use MATLAB tool for SPICE netlist simulation

MNA-MAT, a MATLAB based analog circuit simulation tool, uses Modified Nodal analysis to reduce a SPICE netlist to a system of equations which yield voltage at and current through specific points in the network. monte carlo analysis adds further functionality by evaluating possible uncertainties in real-world working (...)

plot waveform in cadence monte carlo analysis

Hello, I am running cadence virtuoso 6.1.5 and trying to sort out the monte carlo analysis for process variation and mismatch. I want to plot the gain vs frequency plot of a single-ended amplifier for 10 runs i.e. I want to see the 10 gain-curves in a graph window. The only option in EVAL TYPE in OUTPUT SETUP of the (...)

Microstrip patch antenna on FR4 for 2.4 GHz band

I think studying the spice model in analysis process then set parameter in spice program to more practical and proper for purpose . Pspice has monte carlo analysis option , But no 3D graphics result shown .

monte carlo simulation problem

I have designed too many op amps and none of them have any issue with a wide range variations of supply voltage , temperature , corners of process , worst case pvt circumstances , etc . but the problem is the monte carlo analysis by which my op amps are all totally devastated .I know the monte carlo (...)

Running Monte Carlo on VerilogA Variable with Synopsys Custom Designer

Hi all, I am trying to run monte carlo analysis on a variable, from veriloga model. I had initially done the implementation with cadence-spectre flow. below is the example of how it is achieved in cadence-spectre. I put it here, so i can explain clearly what I want. 1. included the following in verilogA model for the (...)

Cross function and Monte Carlo analysis

Dear all, I am trying to run the monte carlo analysis of the offset voltage of a comparator. For this, I am using the 'cross' function from Cadence calculator. The expression I use is the following one: cross(VDC("/OUT_SF") 0.9 0 "either" t "time"), where OUT_SF is the output of my comparator and 0.9 is my threshold value. Befo

[moved] How to use .spf file in HSPICE for mnte carlo analysis?

I have used Synopsys Star RC tool to obtain a .spf file. My question is how to use that .spf file in HSPICE to perform monte carlo analysis? Thank you.

Monte carlo analysis mean cutoff is double the fc from one point analysis in Cadence

I have designed a low pass filter in cadence with cutoff frequency 50Hz. However when I do a monte carlo analysis it gives mean cutoff frequency as 80Hz. How is this possible.?? All the parameters are same?? Please help me to understand this. Thanks

How to use Mosfets_mac?

monte carlo analysis is a statistical analysis perfomed on the components (here Mosfets_mac). The MC analysis predict the effect of randomly varying model parameters of the Mosfets_mac , category of Mosfets. Essentially , these categories of components contains model parameters with specified tolerances.

Monte Carlo analysis- analysis variation

Perhaps this tutorial can be helpful: 123718 ... in monte carlo analysis-> in analysis variation why do we have process only, mismatch only and process and mismatch. Can someone pls tell whats the actual difference. See p. 15 of the above tutorial.

Hello, As you know, PVT simulation is process, voltage and temperature. About process simulation, you can use monte carlo simulation ( samples > 10). To voltage simulation, you will change voltage supply. For example, voltage supply is 3.3 V, you can run 3.2-3.4V and may be plus Vsin (noise). To temperature simulation, you can run 0-70 celcius.

parameters for variance contribution, monte carlo sensitivity analysis (Spectre RF)

Hi, From a sensitivity analysis following a process only monte carlo analysis, I have a variance contribution report showing that the main contributions to the noise figure of a Low-noise amplifier are due to the parameters xbpos, xncjcu and xndren. I am using the IBM process BiCMOS8HP and ADEXL (Spectre RF). Any one who (...)

[Moved]: netlist for a CMOS full adder with monte carlo analysis comment

please provide a netlist for full adder simulation with monte carlo analysis i am using 120 nm model. i want to do threshold voltage variation how can we come to know allowable variation for a particular technology say 120 nm thank you

Standard Deviation of Flash ADC with Monte Carlo Analysis

Hi I just need to ask how to find standard deviation of the transition points of a flash ADC using a monte carlo simulation. Say numbero f runs is 100.

Monte Carlo Simulation (Mismatch)

Hello, I'm working with TSMC 180nm and try to run Montre Calro Mismatch simulation. I can see the parameters variation of Porcess analysis but for Mismatch analysis there is no variation in parameters. I tried to check the variation of toxnmis or other parameters variation which are defined in mismatch section, but all parameters are 0 for all i

library for monte carlo analysis

Hai all, Can anyone get me library fies for monte carlo analysis in mentor graphics. I'm using pyxis version 10.1.

Output voltage of Boost PFC circuit is higher than calculated?

What are the tolerances on the resistors? This will play a significant role and even more with temperature changes. You may have to do a worst case or a monte carlo analysis to see this.

[Moved]: MC ignored warning in Monte Carlo simulation

When I run monte carlo simulation it shows, Warning 369: COMMAND ignored: No LOT or DEV specification found ERROR 26: No analysis specified what does it mean?

Monte Carlo simulation Error

Hi To me it doesnt look that you are doing a monte carlo simulation: you can see this in the toolbar "Single Run, Sweeps and Corners". This should be monte carlo analysis Then on the error you are getting, it seems you are having a network/server error. Are you running the job locally?

Monte-Carlo simulations to find optimum size of a circuit

Hi How to apply monte-carlo simulations to find optimum size of a circuit like flip-flop in HSPICE? Thanks

"Delay Distribution Density" versus Delay

Run a monte carlo analysis - if your transistor models include mismatch and/or process variance parameters - and display the delay measurement statistics ordered in your control file.

NBTI phenomena in simulators such as Spectere

Hi, Every foundry units research on reliability phenomenons like NBTI before developing suitable models. Hence I believe that doing corner analysis and monte carlo simulations would take care of NBTI effects as well. It may not be included in Typical performace models of MOSFETs. Thanks.

Interpretiing data from Cadence stability analysis

I had enough trouble from the stb analysis (coming up with absurd operating points and giving way-bogus loop gain) that I gave up on it and went back to old school methods. You just can't trust it to work each and every time, like you need to ever get through your monte carlo compliance analysis.

[Moved]: Monte Carlo Yield Analysis

Hello All, Please tell me how to decrease the mismatch and increase the yield of my designed Operational Amplifier, as during the monte carlo simulation for yield analysis, the open loop gain drops too large from the gain value it has been designed for. Any help would be highly appreciated. Thanks in advance.[/QUOT

Monte Carlo - circuit exlusion

It depends on the tools and PDK. Some PDK's have different transistors in the library for monte carlo simulations. In other PDK's it's an option in the transistor properties. In AdeXL you can also select which devices should be included in the monte carlo analysis.

Hi, I do monte carlo analysis to my Bandgap project, in this simulation I'm interreste in Opamp parametetrs Dc Gain,PM etc.... But as you can see on picture I have 100run but no sigmas no results no distribution. It looks like monte carlo doesnt change any parameter and do 100times same thing.I'm (...)

Monte Carlo Analysis Histogram

monte carlo analysis Histogram Today at 11:34am Quote Modify Hi All, I am designing a current conveyor and I am doing monte carlo analysis(by varying width and length of transistor) for Current gain , voltage gain and Rx,Ry & Rz. I am using code as given below: Vdd 5 0 2.5 Vss 20 0 -2.5 (...)

Monte Carlo Analysis

Hi everyone, I want to do monte carlo analysis of a circuit by varying its device width . I am writing the syntax as given below : .param W1=gauss(2.072u,0.2,1) and the using sweep monte=30 in ac analysis. Everything is fine upto this point but when I rewrite the syntax as below .param (...)

Monte Carlo settings in pspice

This is not required for monte carlo analysis. This is needed in worst case (.wcase) analysis, which tries to simulate worst case condition by varying the variable. HI, LO just tell the simulator which direction to go wrt nominal value.

What is the meaning of "offset between the threshold voltages"

If you have mismatch (Avt) parameters from the foundry/fab you can calculate worst case offset values for adjacent transistors, depending on their size. Or you can run a monte carlo analysis if you have the corresponding mismatch set.

HSIM mixed mode co-simulation and Monte Carlo analysis

Hello, I want to ask you EDA-board gurus for suggestions with HSIM Co-simulation and monte-carlo simulations. I want to run a montecarlo simulation in a relatively large transistor-level circuit (imagine a microcontroller), but the caveat is that the environment to this circuit is very complex and event-driven. (...)

[SPICE]Make a TRANS sweep of Vdd for each iteration of a Monte-Carlo analysis

Hi, I have an (H)SPICE script which compute the energy consumed by my circuit for a different set of parameters through the TRANS SWEEP statement: .tran 0.1p 600n SWEEP data=info I would like to see how the energy vary for each set of parameter while doing a monte carlo analysis. That is, if i set the parameter (...)

can u tell me the steps for monte carlo simulation in cadence virtuoso 6.1.4 ADE

after the monte carlo run, say I ran only 2 runs, what are the different folders names '1' and '2' . Any idea?

Standard deviation for effective channel length? (45nm)

Hi, I'm trying to find a reference for computing or getting a (not so) gross value for the standard deviation for effective channel length (to perform a monte carlo analysis on my circuit). Despite looking for, I couldn't find anything except it probably follows a law of the type A/sqrt(M*W*L) with A a constant depending of the process (...)

Standard deviation of threshold voltage

Hi, I want to do the variability analysis on my design and hence I need sigma of vth and u0 (standard deviation of threshold voltage and mobility) for monte carlo simulations. I have the 90nm PDK as well, but I dont know where these values are written. Can you please tell me how to get these values? [P.S: I can access PVT corners (fast, (...)

Monte Carlo Analysis using Ocean

Good Moorning at all I'm a newbie in Cadence IC 6 and now I want to use Ocean to get a monte carlo analysis from my schematic. I've written a simple script in ocean: montecarlo(?numIters "3" ?startIter "1" ?analyisisVariation 'mismatch ?sweptParam "None" ?sweptParamVals "27" ?saveData t ?nomRun (...)

Difference between Corners and Monte Carlo Analysis

Corner analysis uses special combination sets of conditions for PVT, e.g. process=typ, V=nom and T=25°C for typ process=worst, V=nom-10%, T=85°C for ind. w.c. process=best, V=nom+10%, T=-40°C for ind. b.c. monte carlo analysis uses randomly selected condition sets in between, often selectable with limited conditions, (...)

FPGA or GPU for monte carlo simulation problem??

I am working on a project "acceleration for probabilistic load flow analysis using monte carlo simulation". At distribution level bus size will be less (<500). But thousands of load flow analysis needed to be done within critical time. Which will be good solution from performance point of view. FPGA or GPU? Thanks in advance.

How to save PAC simulation results?

I'm running PSS, PAC-Rapid IP2 analysis on a frontend circuity. I can plot result through Direct Plot->Main Form -> PAC -> Rapid IP2, and I can read result directly from the plot. However, If I want to save this result, especially for a monte carlo simulation, how to do it? Thanks! So attachment. How to save data on this plot without (...)

simulation models - worst case/Monte carlo models

Hi, I know somethings about worst case analysis,monte carlo analysis. I do these simulations using standard spice models available in Library. What i know is the simulation tool will vary the component parameters automatically during these analysis and gives the results. My question is , do we get (...)

Monte carlo simulation issue

Hi, I am running MC simulations on a simple single MOSFET common source amplifier. Fig 1 shows my MC analysis setup. I am getting variations in both the AC and Transient simulations (Fig 2). But I am not getting histograms for my outputs. Even after precessing the tab for "Post Processing operations for monte carlo" and opening the (...)

Corners Simulation in ELDO, starting from PSPice Circuit Description

If you make the VT, TOX, maybe deltaL and u0 params have variable "k" factors rather than fixed numbers then you can arbitrarily mess them around; knowing what is valid and what's overkill is the trick. You might even be able to make use of gauss() and track() to do poor-boy monte carlo analysis (same concerns about validity apply, only now (...)

V-T Comparator offset test

You run a monte-carlo analysis and look for the point where the current in the two devices is equal. It will only be approximate - it will take account of Vt and some other mismatch parameters but will not account for speed differences between the two halves. Keith. - - - Updated - - - The way to do it dyn

Assign tolerance to the potentiometer ( POT ) found in BREAKOUT library of OrCAD

Did you understand the purpose of the tolerance parameter? It's only used for monte carlo statistical analysis.

Monte Carlo Analysis

The extension of the MC output file name probably is .mt0 . See the HSPICE? User Guide: Simulation and analysis, the chapter on Getting Started with Traditional monte carlo Simulations. The monte carlo PARAMETER DEFINITIONS contain the output data of a single MC run. As I don't know which graphical (...)