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193 Threads found on edaboard.com: Simulate Capacitor
Hello all,
I want to simulate, the characteristics of a capacitor using cadence, but I don't know how can I start.
I used to simulate circuits by tran and dc analyses.
For capacitor characteristics, I try to do sp-analyse as follows:
S-Parameter Analysis --> Ports ----> /C0
Sweep Variable ----> Frequency (...)
Analog Circuit Design :: 11-21-2014 04:20 :: hannover90 :: Replies: 4 :: Views: 627
If you design your circuit with the correct values, it will simulate. The problem with crystal oscillator circuits is that you need a small-time step and a lengthy oscillation time due to the slow built-up of oscillations caused by the very high Q of the crystal.
The 22 pF capacitor can be a trimmer to make slight frequency corrections.
So be
Analog Circuit Design :: 09-20-2014 12:47 :: E-design :: Replies: 26 :: Views: 1228
Decoupling 20Mhz is easier option. Select capacitor with 20Mhz Resonant frequency. Decoupling 2.4Ghz is difficult.....2.4Ghz decoupling requires capacitance in pF range may be 2-10pf range. check with RF capacitor manufacturers. decoupling 2.4Ghz requires very good layout..so, that mounting inductance is very low.....Try to simulate the (...)
PCB Routing Schematic Layout software and Simulation :: 07-31-2014 11:51 :: malli_1729 :: Replies: 3 :: Views: 334
i wanna simulate a microstrip tunable bpf in ADS and i dont know how to find and use the varactor diode
please help me
Analog Circuit Design :: 07-13-2014 05:41 :: saeed3406 :: Replies: 2 :: Views: 383
I believe, it is useless to excite an interdigital capacitor alone. It is always a part of some kind of waveguide, microstrip or coplanar. Create a microstrip or coplanar line, then excite it with a waveport, or lumped port (2-port pass-through model), as you like.
Then I would simulate input sections of the transmission line, and extract them fro
Electromagnetic Design and Simulation :: 04-22-2014 08:29 :: Andryuha :: Replies: 1 :: Views: 305
Hi.
Before start to design the SAR ADC, i want to simulate the relationship between capacitor mismatches of CDAC and SAR ADC using matlab.
when capacitor mismatch ratio is 'sigma' and Cu is unit capacitance,
plz check the equation and next matlab code
capacitor mismatch ratio ~ N(0,sigma^2)
when i want to make (...)
Analog Circuit Design :: 12-28-2013 09:18 :: je01911 :: Replies: 0 :: Views: 380
Hello everyone.
I have an issue with CoventorWare.
I tried to simulate the distribution of the electric field between the plates of a capacitor filled with air. As a result, I got a field distribution merely on the plates, but not inside.
Is it possible to obtain the distribution of the field between the plates?
Electromagnetic Design and Simulation :: 12-13-2013 14:47 :: LPKIR :: Replies: 0 :: Views: 320
What are you trying to simulate with ?
Analog Circuit Design :: 12-12-2013 11:08 :: cmontoya :: Replies: 1 :: Views: 539
Hi everybody,
I am using HFSS to simulate a CPW structure which forms a tank circuit. The capacitor is realised by the CPS and the inductors are realised by lumped inductors. The CPW is 1.5 mm long and it resonates at about 1GHz. HFSS can calculate Epsilon and I think that that is the relative permittivity. The results show that it it very high
Electronic Elementary Questions :: 10-30-2013 15:33 :: PaulGwo :: Replies: 0 :: Views: 301
Hello all,
I am trying to simulate IDC on HFSS but it just stuck at calculating the matrix step, I am wondering if anyone could help me out on that. I have attached the HFSS file on here97434. Thanks.
Electromagnetic Design and Simulation :: 10-18-2013 11:28 :: Mr.Tingalingling :: Replies: 3 :: Views: 399
I want to know how the capacitor can be used as a inductor
Together with an operational amplifier a capacitor can mimic a lossy inductor - and if you can afford to apply two opamps (GIC configuration) you can simulate a nearly ideal active inductor.
Electronic Elementary Questions :: 10-12-2013 10:53 :: LvW :: Replies: 3 :: Views: 372
can you help me to simulate this circuit with ltspice, i want to drive 77 LED from osram
the LED datasheet
i want to drive the LED at 30 mA,
and i want to use this circuit, i have many error when i tried to simulate the circuit,
i want to si
Electronic Elementary Questions :: 08-27-2013 10:38 :: yassin.kraouch :: Replies: 5 :: Views: 493
Its not impossible to simulate an Planar loop structure in ADS..!! Do u have any references that u r following for ur design rules..?? Making a Printed loop in ADS is quite easy..!!
RF, Microwave, Antennas and Optics :: 09-02-2013 05:35 :: SpaceDust :: Replies: 20 :: Views: 1018
Hi,
I need to simulate structure excited with a capacitor through long coaxial cable.
From past experience modeling coaxial cable takes prohibitively long time.
Can I substitute the cable with network of lumped components?
If so how to derive such network?
How to simulate capacitor discharge?
Electromagnetic Design and Simulation :: 03-28-2013 11:21 :: AndreyG :: Replies: 0 :: Views: 368
gm/Id is mostly for DC operating points and small-signal parameters. Switched-capacitor circuits will require a transient simulation. You may get a good starting point with gm/Id, but you'll have to do simulation-based sizing (tweak-simulate-tweak) anyway, maybe with an optimizer software, and could start with it right away.
Analog IC Design and Layout :: 11-26-2012 07:56 :: micpro :: Replies: 1 :: Views: 559
Yes, you can use PSS and PAC to simulate AC response.
The switch Top will turn on which resets the capacitor, now the amplifier is in unity gain feedback
and the negative input of amp will get biased to Vref. So, I think there is no need for another DC bias.
Analog Circuit Design :: 11-09-2012 14:50 :: learning_curve :: Replies: 1 :: Views: 276
I'm trying to simulate the magnetic field between two LC circuits a distance Z apart and find out the Q and S parameters of the system so I can see the efficiency and whatnot.
I'm new to HFSS so it came with this thing called the "Antenna Design Kit" and I was able to generate a model of a helical antenna coil and it has a ground plane and what
Electromagnetic Design and Simulation :: 10-28-2012 01:52 :: zero_coke :: Replies: 0 :: Views: 399
i am using PROTEUS 7.4 to simulate LPC2138 and using Keil uVision4 to generate hex file..
the simulation is not working, it is running without any error or warning and it is showing proper result on Keil debugger...
when i look at flash memory on proteus it is initalized properly but RAM read blank completely
anyone having any solutions..
Microcontrollers :: 10-26-2012 13:10 :: jitu9954 :: Replies: 2 :: Views: 906
I designed one 4th order switched capacitor biquad filter in UMC 180 nm technology using cadence software (version 5.10.41).This circuit is operating on a two phase non overlapping clock generator (i/p frequency = 1 kHz). To simulate this circuit I used, PSS and PAC analyses in Spectre RF tool(Analog Design Environment). For single ended topology i
Analog IC Design and Layout :: 10-19-2012 05:48 :: nishanthpv :: Replies: 1 :: Views: 645
hi all,
I am trying to simulate a push pull stage with negative feedback to op amp. i shall be using it to drive a dc motor with ratings of 10V and 0.5A.
Awhile simulating, sometimes(keep in mind) there are oscillation in output of op amp and hence at the load. I have tried changing Vsource to Vpwl and there also oscillations were there. im
Analog Circuit Design :: 10-06-2012 08:50 :: maanas :: Replies: 1 :: Views: 290
I want to simulate capacitor bank glitch. This is a 8bit binary cap bank. I can use AC or SP simulation find the total cap value vs. code. How can I run some transient simulation and find cap vs. time (code changes with time)? I want to see glitch size when code changes in real time.
Thanks.
Analog Circuit Design :: 09-19-2012 01:59 :: danda821 :: Replies: 3 :: Views: 278
Hi 2 all, there are another questions about class E PA :)
If i want to design load/matching network for the class E PA:
1. Choose inductor and capacitor in drain of the transistor
2. simulate load-pull contours in PSS and choose optimal impedance of load network
3. Create load network with optimal impedance
4. Create matching network for m
Analog IC Design and Layout :: 09-11-2012 10:45 :: sarge :: Replies: 0 :: Views: 309
i have designed a RC OSC, which uses a current source to charge and discharge the capacitor, to generate a trigular wave, and then converted to square wave.
when i simulate the OSC with white noise (max amplitude is 100mV for 3.3V supply)added in power supply, i found that, the jitter of OSC increases a lot (about 2 times)than not including the
Analog Circuit Design :: 08-09-2012 02:10 :: lhlbluesky :: Replies: 2 :: Views: 401
Hi All,
I am looking for the Spice models for a 4.7uF Murata capacitor which would have the following variations modelled,
ESR vs Frequency, ESR vs Temperature, capacitance vs temperature and Capacitance vs Freqeuncy.
I require this information to simulate a LDO circuit that used this external capacitor.
Analog Circuit Design :: 08-08-2012 02:06 :: Rad_31 :: Replies: 1 :: Views: 673
hi.
i am going to design a 3phase inverter motor driver with IGBT's.
designing of pwm generator- soft start-and dead time generator is already finished.and works good.
but at the power stage i have problem with IR2112!
when i try to simulate the circuit the coverage problem accrues.!!
i think it's due to boot strap diode or capacitor.
i am s
Power Electronics :: 07-16-2012 11:54 :: logically_man_can :: Replies: 1 :: Views: 1206
Hello all,
I am trying to simulate a very basic circuit but i don't know why it does not work. The goal is to generate a ramp.
Below the picture: the basic principle is to charge a small capacitor which will be "poured" step by step into a bigger
Analog Circuit Design :: 05-14-2012 16:43 :: ruby1212 :: Replies: 6 :: Views: 395
who use ADS ?
pls tell me how to use SDD to module a step recovery diode ,the following is my module formulor ,but it's err:
73069
I want to discript the SRD : i(t)=dQ(t)/dt, Q(t)=CV, where C is the equall capacitor ,V is the voltage between the diode.
Software Problems, Hints and Reviews :: 04-23-2012 11:01 :: rickyren :: Replies: 1 :: Views: 699
I'm trying to simulate an antenna and matching unit, which has a capacitor in it. The capacitor is physically much smaller than the wavelength.
It is possible to do this in HFSS? I guess it would be possible to draw two parallel places, with a dielectric, which have the capacitance required, but is there a better way?
If I did draw (...)
Electromagnetic Design and Simulation :: 03-14-2012 06:36 :: DeboraHarry :: Replies: 3 :: Views: 732
Anyone can share the knowledge how to design and simulate a voltage multiplier using ADS at low voltage level ~1V?
RF, Microwave, Antennas and Optics :: 12-15-2011 12:02 :: kezambo :: Replies: 3 :: Views: 625
You should put 10 times 1pF MiM cap parallel..
If your operating frequency is pretty high, then simulate them in Momentum to check the parasitic inductances and stray capacitances..
RF, Microwave, Antennas and Optics :: 12-03-2011 00:14 :: BigBoss :: Replies: 2 :: Views: 865
I try to simulate serial channel 2.5 Gbps in Ansoft Designer:
64287
without decoupling capacitor all OK!, but with capacitor eye diagram very strange
64286
In what the reason of such behavior
Electromagnetic Design and Simulation :: 11-16-2011 05:27 :: SAV_ :: Replies: 0 :: Views: 633
What is the best way to simulate several pF SMD capacitors on microstrip line circuits?
Are there some precise mesh/material libraries/constructors available anythere to import and place on the structure to be simulated?
Electromagnetic Design and Simulation :: 10-24-2011 09:37 :: Andryuha :: Replies: 1 :: Views: 1028
Good day EDA fellows,
I would like to ask on how to simulate the process variation of the MIMcapacitor.
In MOS, we have the corner simulation but I don't know about the capacitors.
Thank you.
Analog IC Design and Layout :: 10-04-2011 05:25 :: allennlowaton :: Replies: 5 :: Views: 813
Should your project be something novel ? or you can simulate some devices which are already designed (ex: RF switch or variable capacitor).
Analog Circuit Design :: 08-27-2011 13:20 :: sv1437 :: Replies: 2 :: Views: 328
Hello, imado_60. Unfortunately, ADS has limited number of coplanar components, only transmission lines i think. If you want to simulate an interdigital capacitor in ADS you can only in Momentum, from the EM field point of view (depends now what kind of result do you want from the simulation!!). As far as I know, i don't think any kind of microwave
Analog Circuit Design :: 05-06-2011 06:30 :: kondor_konami :: Replies: 1 :: Views: 1038
On the first page there bottom right graph Vout batch time that in certain turn ratio of 1:20 and Vin 60mV 100s it has been necessary to load uF capacitor 470 to charge to 3.3 V and Vout and Vin as 60mV. This is true? If this is true, I also simulate this LTspicer what I fail to simulate 100s always get error.
Analog Circuit Design :: 04-05-2011 12:22 :: LTspicer :: Replies: 0 :: Views: 345
I am currently working with LTC3108 and to simulate LTspice. With solar panels to feed for simulation I used 0.8 V as the source. I try the different outputs to measure but have different problems. As to why power capacitor decreases after
Analog Circuit Design :: 03-29-2011 10:05 :: LTspicer :: Replies: 0 :: Views: 830
I'm trying to simulate a SONOS gate capacitor with n substrate. The idea is to charge it with FN or DT tunneling and then observe the CV. So far the code i've written is this:
go atlas
mesh width=1.0
x.m loc=0.0 spac=0.005
x.m loc=0.5 spac=0.005
y.m loc=-0.1 spac=0.02
y.m loc=-0.03 spac=0.005
y.m loc=-0.02 spac=0.002
y.
Software Problems, Hints and Reviews :: 03-21-2011 06:09 :: edu11 :: Replies: 0 :: Views: 1001
Because this circuit works with clock or periodic signal, you can simulate it with pss+pac.
Analog Circuit Design :: 03-16-2011 13:13 :: Milad-D :: Replies: 1 :: Views: 369
If you simulate in Cadence, pls use cap from analogLib. For spice netlist, pls just use: Cfly node+ node- 1uF. No special model is needed for simulation.
Analog IC Design and Layout :: 01-21-2011 00:21 :: leo_o2 :: Replies: 4 :: Views: 593
How to simulate a PTAT circuit?
Run a DC analysis and sweep the temperature.
can someone show me how to set the parameter of the component for PTAT circuit?
Your question isn't clear to me: Which parameter of which component?
How is your circuit? Schematic, Verilog-A, AHDL, functi
Analog IC Design and Layout :: 12-13-2010 13:14 :: erikl :: Replies: 4 :: Views: 875
The manual which you attached explains how can you control the motor at page 2. Construct the schematic given in the manual and put appropriate capacitor value that is specified at the capacitors section of manual with respect to your applied voltage 24 or 48 V and simulate it. Which point you did not understand ?
Analog Circuit Design :: 11-08-2010 07:31 :: alperuslu :: Replies: 6 :: Views: 495
help regarding matlab
how to draw simulation diagram in matlab & how to simulate
r=0.25
l=1.57*10-3
capacitor bank =300 MVAR
c=0.124 f=60
8-kV power distribution feeder in with three distributed capacitors is
Electronic Elementary Questions :: 10-27-2010 07:23 :: jayu_dakhore :: Replies: 1 :: Views: 534
LvW is right in all his points. Just to try to make it a bit more clearer, if there is no DC path in the feedback, then any DC signal at the input, no matter how small (offsets etc) will charge your capacitor, leading finally the opamp to saturation and the output to the rail.
Also, when you simulate a transient usually the simulation starts from t
Analog Circuit Design :: 09-28-2010 07:00 :: kgl_13gr :: Replies: 12 :: Views: 715
Hi everyone,
I want to design and simulate a 1st order 200 KHz HPF in Cadence ,
but instead of the regular R I use a subthreshold PMOS resistor
(because the R value needed for this filter is about 1.6MΩ and in
terms of spa
Analog Circuit Design :: 09-06-2010 08:39 :: milvapp :: Replies: 0 :: Views: 654
hi,there
I am designing a MDAC for pipelined ADC.
The structure of it is plotted as attachment.
My question is how to simulate the closed-loop gain vs phase of this schematic because it is a switched-capacitor circuit and decrete-time applied.Then,how does spectere do with its stb analysis with this circuit type?And I only need to add a cmdmprob
Analog IC Design and Layout :: 08-30-2010 08:22 :: urian :: Replies: 0 :: Views: 478
Hi Spidyelectronics,
You can use the LC low pass filter similar to the one you used at the DC side, but the value of the L and C have to be recalculated. First you have to simulate to see the output frequency spectrum without your AC filter (may be using Proteus). then note the frequency components. Then you can use another software (for example F
PCB Routing Schematic Layout software and Simulation :: 08-22-2010 08:58 :: pico :: Replies: 9 :: Views: 1407
Another method, You can simulate the schematic and do cut and try. You can also evaluate the ripple level.
You can take a look at
Hobby Circuits and Small Projects Problems :: 08-05-2010 00:45 :: pico :: Replies: 3 :: Views: 3018
......................
As for your circuit, i don't think it works like a lowpass RC-network, because (as i understand) switched-capacitor approach lets us simulate grounded resistance (like in highpass RC), but not floating (like in lowpass RC).
Regards, pavel.
Pavel, in principle, you are right - as far as the
Analog IC Design and Layout :: 08-02-2010 03:01 :: LvW :: Replies: 17 :: Views: 5421
I am new to analog world, can someone show me how to set up and write the hspice input file to simulate the open loop gain/phase margin for this single stage OP Amp? It's an OP amp with negative feedback.
Many thanks
Analog Circuit Design :: 05-12-2010 02:35 :: tailbit :: Replies: 23 :: Views: 6028