71 Threads found on edaboard.com: Parameter Cadence Simulation
Hi,
How to calculate Jitter peaking and 3db bandwidth(in simulation) of PLL across PVT in cadence spectre.
Thanks
satya
Analog Circuit Design :: 02-17-2017 11:29 :: analogdesigngiga :: Replies: 0 :: Views: 476
See
You can see a defintion of NF(k) in Keysight ADSsim and GoldenGate.
If you use more than three ports, e.g, port1=RF, port2=IF, port3=LO, NF(2) is different from NF of cadence Spectre.
Here you have to use resistor + vsin instead of port3=LO.
RF, Microwave, Antennas and Optics :: 08-22-2016 11:31 :: pancho_hideboo :: Replies: 4 :: Views: 797
Hi I'm not entirely sure if this should belong in this subforum or one related more to circuit simulation, but here goes.
I simulated a structure in HFSS and was able to export an equivalent *.s4p file so that I could use it in cadence Virtuoso. However, when I run port analysis in cadence, the resulting s-parameter (...)
Electromagnetic Design and Simulation :: 07-30-2016 07:08 :: ngox :: Replies: 0 :: Views: 476
Hi everyone,
For an LNA design, the inductors used in the design were simulated in a simulation software separate from the spectre simulator used in cadence for the other components (transistors, resistors, capacitors). So we created a n-port file for the inductors in the design and made it point to the S-parameter file generated by the (...)
Software Problems, Hints and Reviews :: 07-19-2016 17:42 :: mzzim :: Replies: 0 :: Views: 568
Hello,
Im using cadence 6.1.3 and Id like to do monte carlo simulation. I found out that "m" shouldnt be used in schematic or monte carlo might be errorous. source:
So I decided to test it:
testbench
results
ASIC Design Methodologies and Tools (Digital) :: 03-29-2016 19:22 :: Gornarok :: Replies: 1 :: Views: 597
By extracted the channel to S parameter to simulate, but in cadence the simulation time is huge due to the large s parameter file.
Anyone knows some idea that we can convert the s parameter to the lumped RCL circuit to run the simulation?
In order words, if we know a frequency (...)
Electromagnetic Design and Simulation :: 02-20-2016 20:06 :: shanmei :: Replies: 0 :: Views: 574
Probably by saving your session as an Ocean script and
then editing that to add an inner parameter loop. From
the menu interface, it's an either/or type choice.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 09-01-2015 16:44 :: dick_freebird :: Replies: 2 :: Views: 641
The s-parameters being a small signal analysis can be easily calculated using any spice by means of AC analysis. The question is - the mos model you are using for LNA simulation is valid for RF range ?
You can refer the application note to know how to calculate s-parameter using pspice -
Analog Circuit Design :: 08-12-2015 05:56 :: mvaseem :: Replies: 2 :: Views: 1595
hi
thank u edaboard members for helping me a lot...
i m simulating gilbert mixer for finding its input impedance i tried it using s-parameter in cadence but the test bench i used have a balun at RF port so while measuring Z11, i think it gives input impedance at single ended input of balun but i want to measure input impedance at mixer input
RF, Microwave, Antennas and Optics :: 05-21-2015 04:55 :: jignesh_prajapati :: Replies: 2 :: Views: 1122
Hi,
I've been assigned to design a non conventional FET (FINFET,Quadfet etc.) in silvaco and then somehow extract and feed the generated device parameters into cadence for making a single stage amplifier. I wanted to ask if it is possible?? and if yes then how it could be done??
Thank you very much in advance:)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-28-2014 14:51 :: maxxtorr723 :: Replies: 2 :: Views: 763
The source which you have used is wrong.It's a AC source and cannot be used in s-parameter simulations.
You have to use "psin" or "port" element instead of it.These components have internal source impedance ( e.g. 50 Ohm by default) and you should define this component in s-parameter simulation setup ( if you do 1-Port (...)
RF, Microwave, Antennas and Optics :: 09-13-2014 09:26 :: BigBoss :: Replies: 3 :: Views: 1526
You would like to redefine a parameter which is already defined in your model file or PDK. You add this parameter to 'Design Variables' pane in Analog Design Environment window. When you run the simulation, you get an error message similar to the one above. Does Spectre allow duplicate parameter redefinition?
Spectre (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-23-2014 10:13 :: yadavvlsi :: Replies: 4 :: Views: 4409
Sure..
Assign a variable for the parameter which you're interested in then do your simulation by sweeping this variable.
For instance, Rload=1K (Initial value) then make it as sweeping variable in ADE.
RF, Microwave, Antennas and Optics :: 11-07-2013 14:24 :: BigBoss :: Replies: 2 :: Views: 478
Hi,
does NCsim provide some kind of simulation switch/parameter to initialize all the unresetable flip flops of the design, instead of leaving them undefined (or X)?
Regards,
Giorgos
ASIC Design Methodologies and Tools (Digital) :: 08-13-2013 06:28 :: George_P :: Replies: 8 :: Views: 3436
can anyone help me,please!!!!when use the spectre to simulate the SP parameter,after i finished the simulation,and wanna produce the plot,the plot cannot be openned,and the error like this:
Loading paraplot.cxt
simulate...
Loading viva.cxt
INFO (ADE-3071): simulation completed successfully.
reading simulation data... (...)
Software Problems, Hints and Reviews :: 11-28-2010 15:36 :: yxue :: Replies: 2 :: Views: 3414
inductor s-parameter simulation in cadence
While setting the parameter of the inductor, it says "Inductance:1nH Resistance: 670m ohm Capacitance: 240fF ".
But the s-parameter simulation shows that the real part of Z11 of the inductor is 1.76.
Could anyone help me and explain it to me? (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-08-2013 15:02 :: bladewade :: Replies: 0 :: Views: 1106
Hi,
You can do it from dc analysis. In sweep parameters choose the "component parameter" position, like this:
88817
Run simulation and now you can plot transconductance curve vs w or l of transistor.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-04-2013 06:37 :: sarge :: Replies: 1 :: Views: 3534
what's the difference between the job of cdf parameter, which can be set manually in cadence build-in dialog window when try to "i" an part on the schematics, and that of simulation model file, like .scs, which is loaded in the procedure when try to do spectre simulation?
Maybe some parameters are (...)
Software Problems, Hints and Reviews :: 02-07-2013 11:48 :: iamyuchenjie :: Replies: 0 :: Views: 1017
Well, there's the analogLib switch element which, if SW was
a node voltage, would do what you want. Not the form you
ask for, but the result. And it wouldn't look for strict equality,
but >= the threshold parameter.
You could stack switches, like relay logic, to get closer to
an = function (arbitrarily so, but finite slop).
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-19-2012 06:23 :: dick_freebird :: Replies: 2 :: Views: 5962
I use AC and S-parameter simulate the ft of NMOS and PMOS in cadence spectre, two kinds of simulation results, then use ft = gm/(2 * pi * Cgg) verify , found simulation of NMOS and calculation results is same, calculation results of PMOS are much smaller than the simulation results, I can get gm, and Cgg (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-10-2012 10:00 :: beibei :: Replies: 0 :: Views: 1052
Hi,
I have to simulate the gain of my designed LNA with certain antenna impedance as a source. I am using cadence spectre for the simulation.
The problem is that cadence spectre provides n1port for importing S11 parameters of antenna, which is a passive port. Therefore, if i connect the n1port at LNA input to represent (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-10-2012 07:22 :: viperpaki007 :: Replies: 5 :: Views: 2172
Dear all,
I have run an S-parameter simulation with Spectre in cadence and got the S21 of a filter. Can anybody tell me how to plot the Q, which is defined as 3.14*freq*d(phase(S(2,1)))/d(freq)
BTW, the differential term in that definition is also called Group Delay.
My friend told me to export the data into MATLAB and plot the Q. I (...)
RF, Microwave, Antennas and Optics :: 12-27-2011 01:15 :: wht4665453123 :: Replies: 3 :: Views: 1910
Use the parametric tool where the digital code is your parameter.
Analog Circuit Design :: 11-21-2011 19:23 :: JoannesPaulus :: Replies: 4 :: Views: 632
Hello, I beginner in cadence, help me please.
(sorry for my English)
When doing the s-parameters simulation I get such log:
******************************************************
S-parameter Analysis `sp': freq = (100 MHz -> 1.2 GHz)
******************************************************
Error found by spectre (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 09-14-2011 12:31 :: Anatoliy :: Replies: 1 :: Views: 1384
Hi Guys
I need to find the expression for freq for further calculation. I just can not find the expression for it. I am using cadence 1.5.1 and spectre. I remembered I used to find it in browse the data, then I can find it from variable, but I just can not find it now.
Thanks
RF, Microwave, Antennas and Optics :: 05-07-2011 22:20 :: liletian :: Replies: 1 :: Views: 696
Use S-parameter of Touchstone format.
The Designer's Guide Community Forum - conversion of .s8p into SpectreRF netlist
RF, Microwave, Antennas and Optics :: 04-04-2011 16:52 :: pancho_hideboo :: Replies: 1 :: Views: 1821
hello!
If for one transistor k=1/2(uCox) then which parameter in cadence is Cox and which is u (mobility)? An lambda? Can't find them.
thx
Elementary Electronic Questions :: 03-11-2011 14:04 :: geozog86 :: Replies: 1 :: Views: 1450
Hi All, I have a question related to cadence....After i do the DC sweep simulation, I want to plot the variation of some parameter vs any parameter..the cadence won't let me choose this option. It plots "vs" the default swept value.
Eg: If i sweep W (width) of a device and now if i want to plot gm/Id vs Id, (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-25-2011 20:08 :: mfhanif :: Replies: 3 :: Views: 6965
use parameter "max step" to define maximum simulation step (e.g. max step = Tosc_period/10), and "trap" method of integration
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-31-2010 11:16 :: mikersia :: Replies: 4 :: Views: 1736
Hi aindejeje,
1.Create a file (with any text editor) with .scs extension (for example sigtype.scs) and
in this file write the following :
save * sigtype=all
2.Include the above file you just created to your model files from the ADE L environment.
3.Run the simulation with your custom swept parameter and via
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 08-23-2010 15:46 :: jimito13 :: Replies: 6 :: Views: 3977
Hi all ,
i want to measure the resistance of a pmos (operating in triode region)
in cadence and i want you to suggest me a practical way to do that.I am quite amateur to
this,although i used s parameter simulation i didnt have any results.
Thank you in advance
Analog Circuit Design :: 08-02-2010 13:28 :: milvapp :: Replies: 4 :: Views: 2363
I don't normally use Tanner, although I have done briefly. I cannot see from your netlist how the Vto in the model file would be overridden by what you have done. Is Vto_n defined as a global parameter in the model file?
Keith
PCB Routing Schematic Layout software and Simulation :: 04-01-2010 21:45 :: keith1200rs :: Replies: 11 :: Views: 3201
Hello all,my question is : what is the Vd(sat) parameter in cadence spectre simulation results??Is the Vds that a cmos transistor must have in order to enter the saturation region and it means that a designer must be carefull to have Vds=Voverdrive + Vdsat for nmos transistors to operate in sat region??
A second question is : Can somebody (...)
Analog Circuit Design :: 02-21-2010 15:52 :: jimito13 :: Replies: 6 :: Views: 2531
when we do spp (S parameter simulation) in cadence Spectre RF"spp" is not SP analysis. "spp" is a conversion program of HSPICE netlist to Spectre netlist.
And SP analysis is a function of Spectre not SpectreRF.
so, in Sp
RF, Microwave, Antennas and Optics :: 02-10-2010 16:18 :: pancho_hideboo :: Replies: 3 :: Views: 6583
hi Guys,
can anybody tell me ?
when we do spp (S parameter simulation) in cadence Spectre RF and we have to plot S11, S12, S21 and S22. we have to choose dB20 with rectangular mode and
there is one more option below in that window to choose Power Gain P with dB10.
so, in Spectre RF when we plot S21 with dB20 . then is that mean (...)
Analog Circuit Design :: 02-10-2010 13:05 :: girih192002 :: Replies: 1 :: Views: 1668
for moscap, C-V fullfill the formular: V=I*Z=I/(jwc) , so |C|=|I/(w*V)|
if V=1,w=1 then C=I
Insert a dc voltage source in the gate of moscap, set the "ac amplitude" to 1 and dc voltage to "Vin". Do ac simulation and sweep the parameter of Vin from -2V to 2V at frequency "1". Plot ac current "I" of the terminal "G" and the C will be the same as
Analog Circuit Design :: 01-20-2010 07:01 :: sharpsheep :: Replies: 4 :: Views: 8810
Thanks LvW!
But can someone also point out if the method I am using is correct? As in doing the S-parameter analysis, and then using the Z paramater. Or is there some other way?
It's ok, but since you connect one terminal of inductor to ground, so it's just a single-ended Q
if you use it as a differential Q or some el
RF, Microwave, Antennas and Optics :: 01-13-2010 21:00 :: totowo :: Replies: 11 :: Views: 5591
Hi Guys
For most of the device, cadence use bsim4 model, so how in cadence they transfer the parameter into a real circuit like capacitor , resistor network.
Also, how will they use I-V curve of device? Will they use it to calculate capacitor and resistor and inductor, or they will use I-V curve directly to run the (...)
Analog Circuit Design :: 03-31-2009 22:51 :: liletian :: Replies: 0 :: Views: 996
I try to run the TRAN and PSS simulation in cadence with the nport s-parameter file obtained by HFSS.But it does not work.
How to run TRAN and PSS with s-parameter?
Electromagnetic Design and Simulation :: 03-30-2009 15:27 :: elite631 :: Replies: 2 :: Views: 2186
Hi~
I use the IBM 7RF cadence designkit with cadence 5.1.41 and spectre simulator.When I try to simulate a simple circuit using the nch mos devices then I got following error:
----------------------------------------------------------------------------------------------
Error found by spectre during circuit read-in.
?/cad
Software Problems, Hints and Reviews :: 03-07-2009 00:35 :: morevening :: Replies: 3 :: Views: 4691
How to specify Vth(Threshold voltage) of a MOSFET as a parameter for monte carlo simulations. Thanks in advance.
Analog Circuit Design :: 03-22-2009 06:01 :: arunkumar446 :: Replies: 0 :: Views: 1459
you can also use dc analysis and obtain 'gmoverid' parameter.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 02-22-2009 04:57 :: oermens :: Replies: 5 :: Views: 2869
What is the parameters for calculating of AMS CXQ 0.8u such as Vthn, Vthp , Kn, Kp. Lamda and so on. I use cadence simulation.
Analog Circuit Design :: 02-21-2009 07:14 :: kickeyes :: Replies: 6 :: Views: 1145
For your first error, there is some CDF call back function working in the background that will try to calculate some parameter like Perimeter of Drain region or area of drain region. When you dont enough parameters for that callback function it displays an error in the schematic window. To confirm about your simulation you need to look at (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 01-29-2009 09:31 :: gunturikishore :: Replies: 3 :: Views: 4347
Hi
can some one tell me the equation for beteff parameter that is displayed in cadence spectre?
Thanks
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-20-2008 14:44 :: bharatsmile2007 :: Replies: 1 :: Views: 1713
Hi,
I am a research student in ASU, Tempe. I am having troubles in running the montecarlo simulation in cadence, for tsmc 0.35 um technology. Looks like some parameter files and parameters are not available. Can someone, help me in this regard or upload the required files for running the simulation?? (...)
Software Problems, Hints and Reviews :: 10-21-2008 23:29 :: kdeenada :: Replies: 0 :: Views: 1610
I am trying to simulate the mismatch of current mirror using spectre-dcmatch.
Now the problem is we do not have the parameter in the model card. So I mannully set the parameter mvtwl. However, in the DC simulation I still can not see the modified parameter, and it only displays zero.
Can someone help me? Thank you!
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-19-2008 12:09 :: hotraymanf :: Replies: 0 :: Views: 2017
First, you should using verification tool diva, dracula or calibre get the extracted file, and annoded the parisitic parameter. I know the cadence cdsdoc include some paper refer to it. you can read it
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-17-2008 05:00 :: dabing :: Replies: 1 :: Views: 2530
By parameter sweep.
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-11-2008 08:52 :: Hughes :: Replies: 2 :: Views: 827
You define a transient sweep and setup a parameter sweep to sweep variable TEMPDC -- the variable can be picked up with menu.
Then you setup an outpu expression with calculator. Maybe you need function "value". After a successful run, this expression should give a single value, displayed in the simulation window.
Then you do the (...)
Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 04-10-2008 05:18 :: Hughes :: Replies: 3 :: Views: 1017