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## kT/C noise simulation

Hi everyone, I'm just wondering if there is a way to simulate the kT/C noise and/or the 1/f noise? I'm using cadence Virtuoso with eldoD simulator or questa. If there is no way, should I satisfy with some basic hand written equations?? Thank you

Hi all I would like to add noise source for my simulation under cadence but have no idea how to do so. Anyone has any idea how to do that?

## Cadence Virtuoso Vs Tanner EDA L-EDIT

cadence layout isn't the best for MEMS structures, other tools have been more aggressive in adding support for the weird (from an IC perspective) geometries. And it's certainly the most expensive tool for the job (unless this is Somebody Else's Problem). I've seen some other layout editors that make noise about MEMS suitability; I'm sure you cou

## figure of merit , VCO

dear every body i am practicing to simulate VCO using cadence, i already known to simulate phase noise, PSS , or how to get current consumption of VCO but i do not how to simulate FOM parameter in cadence could you please guide me or give me some advices to get this parameter in cadence tool thank you in advance .

## VCO phase noise is too bad, need to improve it

Hi, I am designing a VCO in cadence, operating at 2.4GHz, its phase noise is -47.4 dBc/Hz. How can I improve it?

I am building sigma Delta ADC, i want to include the effect of thermal noise in the sustem.. Is there any way to include noise source to represent resistors' thermal noise ?? a random source generator or something ?

## i need help in my first designs using Cadence

Open cadence ADE First, Chose the model Library you want to include Eable DC analysis, AC analysis, noise analysis(Select the frequency you interest) Then plot the AC magnitude and phase, you can check your GAIN, AC response, Phase margin here. You can also plot the curve of noise Plot the DC current from vdd and I*V is your power (...)

## Signal to Noise ratio of a complex filter in cadence

I have designed a complex filter in cadence and want to find its signal to noise ratio. Can anyone please tell me how to do it?? Thanks in advance

## Noise Figure in mixer - simulation by using Cadence

Why in simulation by using cadence, even a simple basic mixer also showing very high value. There is any setting or consideration? bcos in most of Journals they can achieve NF below 15dB, i have been tried many ways but NF can not achieve below 18dB. Please anyone help me. Thanks advance.

## Cadence: Seperate cell views' subcircuit can work, but put them together cannot work

You could start with just what "didn't work" means. A result you didn't like, or failure to produce a result at all? bandgap / PTAT loops without explicit startup mechanisms, can easily converge in one testbench and fail in another, because when they start up they're doing so on "numerical noise" which depends on the circuit matrix and algorithm

## Flicker phase noise: simulaiton with PSS+Pnoise in cadence

I have a problem with Flicker phase noise of a quartz crystal oscillator simulated with PSS + Pnoise of cadence: Indeed I simulate the phase noise of a quartz crystal oscillator and I include only Flicker noise (verilogA) in the feedback amplifier. The simulated phase noise shows white (...)

## Noise analysis in Cadence and relationship with S-parameter

Hi All, Can anybody suggest the relationship between s-parameter and noise of a signal trace. I hope tools like ADS have option to generate noise from the s-parameter calculation tab. what about noise anlysis in cadence ? Is there any option to generate noise from signal trace in Allegro??? or NEXT and (...)

## Resistor noise contribution problem in cadence(noise summary)

Hello, I am running a noise analysis in cadence. In noise summary, I am getting the following two terms for noise of a single resistor RL23. rma rn RL23. rmb rn I know that rn is the thermal noise of the resistor but can anyone tell what does rma and rmb mean?? Thanks (...)

## output noise vs frequency plot

hii all, can any one tell me how to get output noise vs. frequency lot in cadence

Hi, With calculator, you have VN2(), wich plot the squared noise vs frequency. To obtain the output noise, just integrate over the desired bandwidth (iinteg), calculate the square-root, and here it is. You shoul find the same value as output->print->noise summary (be careful of units)

## opamp model needed with noise

There's a opampmacro model in the functional library in cadence. Unfortunately, this does not have noise modeling. Is there a opamp model with that incorporates noise? Thanks.

## Low noise amplifier P1dB gain compression cadence

I designed an lna,the input-referred 1dB compression point is shown below 76307 With the increase of input power, the LNA gain increased. I think the input-referred 1dB compression point is very strange I feel normal as follows, 76308

## Programmable Gain Amplifier

I want to simulate in cadence noise Figure, IIP3 and 1dB Compression point of PGA, i used in my design op amp and feedback loop to vary its gain by varying resistor .

## Error in Cadence noise analysis

If you want to see the noise at internal nodes and/or the noise contributions from internal devices, I guess you have to select them before.

## How to simulate Phase Noise of VCO with switched part in Cadence?

I designed a VCO which some part of it is switched by a periodic source. The switch frequency is 1/100 of VCO frequency. I want to know how can I simulate the VCO phase noise with pss and pnoise analysis in cadence? I want to know the required setting in cadence. Thank you in advance.