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320 Threads found on edaboard.com: Cadence Noise
Hello all, Newbie here. Trying to learn about phase noise in cmos VCOs. I have a assignment I was given, and have been scouring the internet and textbooks trying to get past one part. I have a current starved VCO I designed in cadence. Part of one of the tasks is the following: "There is difficulty in using CAD tools to assess phase noise (...)
hi.. i am layouting full adder using cmos in cadence virtuoso,but i m facing problem while connecting bulks to the supplies... anyone tell how to connect these to supplies... i have attached a fig. of my layout.. help me
If you have cadence+Spectre there is a lot of docs regarding noise analysis.
Hi I have to design an LNA at 900MHz on cadence. I m using tsmc 0.35nm technology file. The transistor I have selected for my application is Avago technologies ATF-34143. But this transistor is not available in cadence. In cadence tsmc library I only have nch transistor and nch5 transistor. The only thing of the transistor I can change is (...)
Hi Himali, Go through an attachment to do Phase noise Simulation of VCO and PLL. I believe you need Spectre RF to do PSS noise Simulation . also, you can go through help manual of cadence.
hi, everybody, May you tell me what design enviroment is used to simulate phase/frequency detector? Does analog design enviroment can support the PFD and prescaler simulation? Thank you all.
Hi, guys! I'm now trying to design an amplifier to amplify thermal noise of a resistor, say, 1GΩ. I'm quite new to this topic as well as the software-cadence. The simulation is supposed to be done by Spectre. But how can I simulate the thermal noise? Can anybody help? Thanks a lot!
Hi, We have designed a basic current source loaded nmos common-source amplifier as well as an op-amp in a 0.35 technology in cadence and we would like to optimize the design for a minimum 1/f noise. Since I am not very familiar with noise simulations, can anyone help me with: 1) Does the regular noise analysis in (...)
Please forward procedure for noise simulation using cadence spectre for NMOS thanks
I guess standard cell library models have 3 sections - timing data - noise data - power data u can take a look at any cell to see its syntax and on what factors it depends. I guess cadence SignalStorm and Synopsys Liberty NCX can do automatic Library characterizations to fill in these 3 data for each cell.
Hi All, I heard cadence's spectre has a new feature supporting transient noise analysis. But I cannot see the options such as noisefmax and noiseseed in tran analysis setup of my spectre. The version of my virtuoso ADE is 5.10.41.500.6.130 Do I need to update to any newer version? Or is there any switch I need to set (...)
The transient noise simulation in cadence has a bug and does not work when you have a switch in series with a current source because the noise update is not done when the switch turns on and off but rather every 1/(noise bandwidth segment). In the newer versions of mmsim this has been fixed.
I have designed a low noise amplifier and gotten the satisfied simulation results when it was simulated in ADS. Unluckly, the simulation results in cadence(ic5141+mmsim610) is very bad. The paraments are all the same. The difference is that the PDK in ADS is TSMC rf cmos 0.18um v5 and the PDK in cadence is chrt rf cmos 0.18. What's more, in (...)
find the cadence manual for the SpectreRF, u had better find out the latest release.
Hi, I want to perform noise analysis in cadence but I haven't found any really relevant tutorial in the topic. Could someone please send me a tutorial, or a link to such a document? I have already checked cadence sourcelink as well but it haven't returned anything serious. So does somebody have experience/idea ab
I don't think you can get it directly from cadence. You have to plot the output noise spectrum and then find the intersection of the extrapolated 1/f and white noise lines.
Hi, I want to perform noise analysis in cadence but I haven't found any really relevant tutorial in the topic. Could someone please send me a tutorial, or a link to such a document? I have already checked cadence sourcelink as well but it haven't returned anything serious. So does somebody have experience/idea about
... I'm designing a low noise differential amplifier using the ams0.35um technology in the cadence environment. This amplifier is going to work as a differential amplifier without feedback because the amplitude of the input signals is really small. The output is going to be single ended. Now i'm trying to simulate the input
What ever i feel related to Data preparation in the PD is preparing the noise analysis libs (CDBs in cadence world ) ,the foundary data, the required lef and timing libs ...etc.. i work in cadence world so i got these things, and will be different in other EDA tools like synopsys or magma
the simulation results of cadence follow the analytical methods from Ali Hajimiri. "A general theory of phase noise in electrical oscillators" Reading his paper,there are many methods to improve the phase noise of the VCO. First,you may increase the output swing,which relates to the qmax. Second,you may reduce the rise time and fall time (...)