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# Flicker Noise Simulation

31 Threads found on edaboard.com: Flicker Noise Simulation

## VCO phase noise error !

In fact the noise Floor is weird and there isn't any flicker noise corner or 1/fx drops directly If you post your simulation setup, we can interpret it better.

## Flicker noise simulation for Schottky diodes

Hello everyone, I am trying to simulate the noise of a Schottky diode power detector. Theoretically, the flicker noise should approach zero if there is no dc bias but the simulation results I am getting using ADS are quite the contrary. Any comments and experiences are welcome. PS: I am attaching the plot of Id and (...)

## [Moved]: Problems in simulation noise of amplifier

Probably the bandwidth of your opamp is smaller than flicker noise corner frequency?

## Help for VCO phase noise simulation after bandpass filter by using functional block

According to Leeson phase noise equation, doubling the loaded-Q the phase noise gets 6dB better. Try to use Q of 100 instead of 50, and see what happen. At least you find if the reason is the low Q filter added to the circuit. Beware that Leeson equation applies only between 1/f flicker corner and the corner where the white (flat) (...)

## questions on current noise simulation

Because of flicker noise, should low freq noise be higher than high freq noise? Voltage noise yes, current noise no. See a typical MOSFET noise

## SSB Phase Noise / SPICE model

Usually the Spice models of those transistors don't have the flicker noise parameters set, and you cannot trust the SSB phase noise simulation in that region.

## How to simulate 1/f noise reduction of CDS in simulator

Hi, I have designed CDS circuit. As given in literature, CDS reduce flicker noise and sampling noise / KT/C noise. I know that, we can calculate KT/c through Transient noise simulation in spectre. But, Please, let me know how can we simulate 1/f noise reduction through CDS

## problems about simulate flicker noise of chopper amplifier with PSS & PNOISE

hi all~ From papers I read about chopper stabilization, the flicker noise in the PSD of chopper amplifier should be modulated to odd harmonics of chopping frequency. And I use a simple fully differential op-amp to simulate this function with PSS & Pnoise. The beat frequency is 10kHz. From the simulation below , the (...)

## Hi dose anyone know monte carlo simulation?

HI everyone I want to simulate MOS noise which are Thermal noise and flicker noise. for approch this noise simulate , I am going to use Monte carlo simulation in HSPICE. I put the device variation like below .tran 1us 100ms sweep monte=30 .param LENGTH=0.35u .param (...)

## how to get flicker noise for NMOS and PMOS?

Hi Guys How to get the flicker noise of NMOS and PMOS devices from simulation? What kind of simulation should be ran to get it? Thanks

## Does DFT give signal/noise information? How to Simualtion SNR?

If you just wanna know thermal/flicker noise for most linear circuits, you could simply use "noise" simulation. I'm afraid that DFT is just for the simulation of quantization noise for sampling circuits.

## Flicker noise simulation again

Hi, dear all, the flicker noise analysis again. Last time, I asked about flicker noise simulation and thanks for palmeiras's help. However, when I running simulation, I found sth. quite controdictory to what we learned before. According to many text book, like razavi, paul gray, it is (...)

## How to do flicker noise simulation in scripts (spectre)

Hi Jordantang. In the ADE, the simulator presents the noise per components (MOS thermal, resistor thermal, flicker, and so on). Using the script, maybe you need to find in your models, the noise parameters and work with it. For example, you can cancel (make them equal to zero) the parameters related to flicker (...)

## need help in obtaining flicker noise

In the HSpice manual, FN is "output flicker noise" and ID is "output thermal noise due to channel". The RD etc are due to drain resistance etc. Total is the sum of them all (straight arithmetic sum because they are all in volts squared per Hertz). Keith.

## noise anaylsis in pspice, determine flicker noise in NMOS

hi, im to pspice and currently doing a project to determine flicker noise in NMOS transistor. the problem now is when i set for noise enabled and simulate it, the output simulation will give result as below: * Analysis setup DEC 10 0 5 -----------\$ ERROR -- Invalid value .noise V() V_Vgs 1 .OP .LIB (...)

## flicker noise simulation result different from computation

I simulated a simple common source NMOS with a 1kohm resistor load with noise analysis. in spectre noise summary, i get the squared noise at 0.1mHz as id = 53.2567 e -18 fn = 1.395 e - 3 My transistor is 144u/2u with Kf = 1e-24 and cox=4.6mF/m^2. The gm is about 4.9mS. Id is from thermal noise = 4kt(2/3)gm(R^2) = (...)

## Noise simulation in HSPICE

kindly help in doing noise simulation using HSPICE.. How can I get noise in term of thermal, shot and flicker?

## flicker noise simulation in cadence

Hi, I would like to do the flicker noise(1/f noise) simulation of differential opamp using cadence tool. Which analysis I should do? Is it noise , pnoise or pss analysis? How to give the necessary parameters for these analysis? Do anyone have an example schematic for (...)

## Parasitic Insensitive Design

For a switched cap application, does parasitic insensitive design reduce flicker noise? I did a noise simulation and surprised to see a flat horizontal line at the low frequency... looks like the flicker noise is gone...

## How to insert RMS noise into a circuit simulation?

noise where PSD is the thermal noise PSD and vf2 is the flicker noise value at 1Hz alpha is the flicker exponent

## How to counter the phase noise in ring oscillator?

I meant by transient analysis is to have indication for the deterministic jitter without the flicker noise. we can say it's acceptable if the flicker noise is negligible like most of cases concerning the Ring Oscillator. I hope I came to the point best regards, Rania are u sure? i don't think so, tran analysis (...)

## help on pll jitter simulation

In your transient simulation, no thermal noise or flicker noise is included in your simulation. Some famous company can do transient thermal noise analysis using its own tools

## analog filter output noise

Hi, all Did anyone know how to simulate or calaulate the second -order analog filter output noise(thermal + flicker)??Can supply some material about this topic? Thank you sch

## spectre simulator read spice models

I use spectre to simulate circuit , but unfortunate the spectre model hasn't flicker noise ,i add it but result is incorrect. So i use spice model in spectre simulator. The DC and ac simulation is right,but transient ,PSS and Pnoise is not correct.... so anyone can help me ? Is there has some thing i forget? thanks~~~

## Simulation of flicker noise

How to simulate flicker noise in MOSFETs using Cadence?(looking for setup)

## noise summary results display in Cadence Spectre simulation

fn is the flicker (1/f) noise portion of M0 noise id is the channel thermal noise portion of M0 noise

## hspice model file noise factor

My hspice model file does not contain noise parameter: AF KF.However, it specified parameter: noimod=2. Added after 10 seconds: When I do simulation of noise, I could see flicker noise. However, I am not sure how simulator knows transisors' noise performance?

## Flicker noise modeling for ota-c filters

Hi. I need some help about where can i find information on flicker noise modeling for ota-c filters. Thanks

## BSIM3 noise model flag, noimod, and PNOISE

Hi there Do you know where I can find noise model flag, noimod, in my technology mode file (*.scs) for spectre ? Since I would like to whether noimod=1 or others in order to check my Pnoise simulation results for flicker noise. Right now, I found I couldn't see the flicker (...)

## how to make a white noise sim model ??

hspice spice model KF only for frequency_domain , can not use in time domain (like .tran) but I find a solution is use VCVS ... and make a behavior source like flicker noise

## bandgap flicker noise

Can any one suggest method or some paper to reduce the flicker noise of the Bandgap reference source.