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40 Threads found on edaboard.com: Hspice Accuracy
Hi, I have used this statement is my hspice simulations .option accurate Would this work for better accurate solution? Do i have to instead use .option accurate=1? Is there a way i can find my simulation timestep? thanks in advance
Hi All, Currently I am using finesim tool for characterization using Siliconsmart. I have asked for correlation study, i.e i have to compare the .lib using finesim with the .lib using hspice. So are there any tool to which we can import the spice netlist and compare the .lib (generated from finesim and hspice). Regards, M.Ali
Hello, I am defining a model card for a simple custom resistor : deltaV=R*I targetting a simulation in HSIM (Fast Spice simulator "coming from hspice"). When I launch the simulation of my netlist : a circuit including this simple resistor custom, I have a Warning message. My goal is to evaluate the runtime (and accuracy) impact of the model
I use -mt command to make hspice run on several cores, it sometimes gets correct results faster than just one core running, but sometimes gets totally wrong results while I could get correct results by running on just one core. Why's that case? Thanks!
/1/ hspice? User Guide: Simulation and Analysis Version B-2008.09, September 2008 /1/ p. 579: Specifying Relationships between Properties /1/ p. 580: "When designing circuits, the multiplicity factor M is always a positive integer" /1/ p. 49: "The .OPTION NUMDGT=x controls the listing printout accuracy."
Current equations are found in any texbook but the best way to check the accuracy of this equation is to simulate with-for instance- Cadence or hspice. Because foundry MOS models are generally are very complex so that it doens't permit to calculate the current density in the channel by hand. The equations which are given in those textbooks is to gi
It is dependent on which key (accuracy, design capacity and tool runtime) you need. The tradition spices include hspice (synopsys), eldo (mentor graphics), finesim (magma was acquired by synopsys) and so on. You also can find some free spice tools by google. I guess that is what you want. In the other side, the fast spices are customsim (synopsys),
Hi, While characterizing one of my IO buffer for a particular timing arc for various values of load capacitance, I see that the simulations are converging when the load is cap values are higher. Unfortunately, they are not converging when the load cap value is set to a lower value. I find this rather strange :) As per my understanding, wen th
hspice, spectre turbo, spectre APS,any other faster? Thanks.
Hello all, Anybody is using Cadence UltraSim? I have been used Spectre and hspice, but I don't have any experience with Ultrasim. I think this sound stupid, but I'm wondering Ultrasim can take the Spectre transistor models? I will also appreciate your help, if you can point me out some tutorials regarding usage of UltraSim. Thank you,
Hi guys, I met one challenge in simulating the low jitter synthesizer in verilogA in hspice simulator. The theoretical rms jitter of the synthesizer is expected to be a few hundred fs. However, the accuracy of the simulator is somehow limited to be at ps level. How can I further improve the simulation accuracy for this (...)
Hi, I am now using the transmission line model in hspice to facilitate my design. the U element is the lumped RLC transmission line model. and W element is the distributed RLC transmission line model. The simulation are quite different between these two models. I have no idea how these two models work. So could anybody tell me the reason?
Hi All, I am using hspice generated netlist for simulation and I am simulating leakage based circuits. I wanted to do fast simulation using nanosim as the VCO simulation takes a long time in hspice. I wanted to use different accuracy levels for the various blocks in the circuits, viz high accuracy for analog blocks (...)
it seem that 2007.09 support vista hspice 2007.09 - Major Enhancements in Sept 2007 Release Performance, Convergence & accuracy Improvements Multi-CPU .ALTER support Improved auto convergence Faster netlist read-in Design for Yield - Variability Analysis Spatial variation support Subcircuit parameter support Board & Package
we usually use synopsys hspice ..but hspice is expensive and very slow not convergence as I know other spice maybe better like ELDO smartspice tspice which one have windows+ linux versin ? which one have 64 bit version and which one is fast & accuracy and result is close hspice (Golden tool) how about (...)
Hi, hspice may be too slow. We did this before via fast spice simulator like Hsim.
in hspice RF u can do it , with power sweep via the HB engin khouly
Yes, hspice is adequate to simulate a 1GHz ADC. And the post sim are MANDATORY. The (usual) problem is that it takes someone with a lot of experience, to make a design that really works at 1GHz.... The simulations have the tendency not show much more than what we are trying to find ;-), and thus we need first to know what to look for... Rega
ADIT vs Hsim vs Starsim vs Nanosim .. adit run fast than hspice / eldo . smartspice but hsim vs adit vs nanosim(powermill) which tool is better on whole chip simulation more fast & more accuracy .
In general , Bsim 3v3 or hspice L49 use for .13 ~ .25um but in 45nm or 90nm still use L49 model ? or other accuracy model what is difficult design in 45nm ? or just like .18um trust "hspice " + post sim extract tool