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Spectre Noise Simulation

90 Threads found on edaboard.com: Spectre Noise Simulation

[300 pts]Ineed a step by step tutorial on using spectre RF

Hi all, I used only to do trans simulation for a PLL and now I'm trying to do ac simulations. According to some threads on edabord I knew that spectre RF can: 1- automatically plot the curve Freq=Vtune for the VCO 2- Plot the frequency spectrum curve of the VCO/PLL 3- Measure the jitters 4- Measure the noise. (...)

Calculation of noise figure

When I simulate the noise performance of an amplifier using Cadence spectre, I can get the values of output noise voltage (Vn,out) and noise figure (NF). But I use the formula NF=square(Vn,out/A)*1/(4kTRs) (A is the voltage gain.) the result of NF is different with the simulation result. Why?

Transistor noise current simulation in spectre/cadence

Do you know how to measure the noise current of a transistor in saturation? I bias the mos in sat region then how to specify/manage the probes in noise analysis.

Mixer NF Simulation problems in Spectre

Hello people, I am having some trouble simulating the NF of a mixer I designed. I am trying to simulate its performance using spectre Periodic noise Figure analysis (combined with PSS of course), in the ways described both in CADENCE's app note ( ) and in a tutorial from a Sweden University

Simulation noise in Bandgap circuit

Hi evrybody; I have a question, How Simulate noise in bandgap circuit? i'm using Cadence "spectre" I'm inexperimented please step by step Thanks Regards .

CMOS Operational Amplifier

On spectre you can use the noise analysis and then choose the noise source to be your input and the output is the OpAmp output Run the simulation go to Results-->Print-->noise Summary Rania

What is the standard for noise file format and is there a method for creating them?

After I plot the phase noise data of an oscillator I want to save the output data to a text file in spectre. Then I will use this data for next simulation as a noise file in a sinusoidal source. The problem is the tabular results display of calculator tool saves the output to a comma separated file or an xml file. However in (...)

Delta sigma transient simulation in Spectre

I am running into a problem when I was trying to simulate my DSADC in spectre. The entire system is using ideal components (no transistors, but there are VCVS, R, C) and Verilog models. When I was doing transient sim using "Liberal" setting, for about 60us, it was running fine and giving correct output (noise shaping and all that) but then at about

Delta sigma ADC transient simulation in Spectre

I am running into a problem when I was trying to simulate my DSADC in spectre. The entire system is using ideal components (no transistors, but there are VCVS, R, C) and Verilog models. When I was doing transient sim using "Liberal" setting, for about 60us, it was running fine and giving correct output (noise shaping and all that) but then at about

Delta sigma ADC transient simulation in Spectre

I am running into a problem when I was trying to simulate my DSADC in spectre. The entire system is using ideal components (no transistors, but there are VCVS, R, C) and Verilog models. When I was doing transient sim using "Liberal" setting, for about 60us, it was running fine and giving correct output (noise shaping and all that) but then at about

how to simulate mixer noise?

You cannot use SP analysis with mixer noise. SP is a small signal linear simulation that does not take into account frequency translation. (Although I heard about spectre RF's Periodic SP simulator - PSP that can be used to calculate the noise figure for periodically varying circuits). You can use HB simulator in ADS or (...)

how to simulation the performance of a auto-zero circuit?

well, if u r using only spectre (no spectre RF) then can put sin source representing noise signal and do transient analysis and examine the noise at the output (of course this can be done also with the dc offset). if u have access to spectre RF u can do PSS then Pnoise , and see the (...)

Region 3 area in cadence schematic simulation using spectre

Type "spectre -h model_name" in terminal. There are many model names for BJT. See correct name in netlist.

Noise simulation in spectre

How to calculate noise,minimum noise figure in spectre by writing code in .scs file instead of using graphical environment? Like for ac one writes ac_analysis ac param=freq start=1e8 stop=1e10 lin=20 annotate=status If u have some information please help me

How to test or simulate the jitter of LVDS TX ?

concerning the jitter - as jitter depends on the noise created in the TX driver stage you can do a transient noise simulation with mmsim/spectre from cadence - if you use cadence tools ... after running the transient noise simulation with a pseudo-random-bit-generator or just a pulse (...)

How to counter the phase noise in ring oscillator?

use spectre ,there is pss simulation

Phase Noise Simulation in VCO

you can use spectre RF for phase noise simulation. If the input frequency of the pll is fixed, the tuning range is dependant on the process variations. The tuning range of the VCO should cover the process variations.

In the cdsdoc spectreRF documents, you can find step by step simulation tutorials using ADE. For more detailed RF design methodology, you can refer to cadence RF design kit which includes a complete WLAN RF reference design.

about noise simulation for lna in spectre

the simulation just tell me the noise out/noise in=nf and added noise, but when I change the source impedance and temperature all of the three noise also changed,can anybody tell me based on what the noise data are given out especially noise in.

Noise simulation using Specter

Hi ,,, I hope every body are OK, well, how to simulate the noise using Cadence spectre? I want to simulate the noise sources effects on differential amplifier performance , so, the NMOS noise, tail current, and the load (passive or active) are considered. so what is the procedure? thankx

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