Search Engine www.edaboard.com

320 Threads found on edaboard.com: Cadence Noise

## calculating random jitter in PLL from VCO phase noise

I have a 16GHZ pll and div by N is 160. I am trying to calculate random jitter from phase noise of VCO. I TRIED IN cadence by setting noise source type as jitter and then selecting FM jitter or PM jitter. I was wondering how to plot jitter information using above choices I have made in direct plot form. Also, while calculating Random (...)

## unity Noise Gain in Tag comparator

Hi I already design a 40-Bit Tag comparator schematic in cadence 6. Now i want to measure Unity noise Gain in cadence6. will you give me steps to find unity noise gain?

## THD of low pass filter for ultra low frequency

I have designed a low pass biquad for cutoff 14Hz. I have done its dft and thd. I got thd 125.814. What does this value mean. In the help guide of cadence calculator, it say the formula returns voltage percentage. Please help me to understand this. With dft I got the follpwing graph 124160 When I use the log scale I

## calculation and plot of phase noise for phase frequency detector in cadence

Hi all, I am trying to find how to find phase noise for phase frequency detector in PLL in cadence. Everyone is discussing about phase noise in VCO. Please any one can help me in finding phase noise value and plot in cadence. Regards, tanya dey

## How do I measure the PLL bandwidth using Cadence Virtuoso

Is there any way I can measure the bandwidth of the PLL - which is like a low pass transfer function- using cadence Virtuoso?

## PVT analysis in cadence

Hi can someone pls explain to me what is PVT analysis and how to do the analysis in cadence. I understand a circuit has to be tested under different conditions say if the voltage varies, and how stable it is in varying temperature and also the same functionality is met even it some changes occur during fabrication process and changes which are widt

## [Moved]: noise calculation format using cadence ads spectre

noise calculation format using cadence ads spectreWhat do you mean ? Use correct terminology. I have a circuit (buffer) to drive interconnect, i calculate the noise of it but the form of the noise in (V^2/H), whats this unit meaningnoise Voltage Density,

## Folded cascode opamp design procedure using cadence

I need folded cascode design step by step, i want to implement it on cadence 180nm suggest me the procedure or ieee paper through which I can design Folded cascode opamp using cadence

## Opamp input current noise simulation in cadence

Dear all, I am using cadence to simulate an opamp's input referred current noise. However, i have no idea how to build the test circuit for it; since I cannot use a current source as a input noise source in the noise analysis. If i do, the bias condition will be disturbed. can anyone help me? Thanks a lot!

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

Hi everyone. I am using cadence IC5 to simulate a 2 stage opamp noise. What I want is to find the corner frequency where 1/f noise equals thermal noise. The problem is that from "direct plot->main from->noise" I can see the 10dB/decade roll till 1kHz, then the power begins to keep decreasing with 30 (...)

## transient and ac analysis on cadence virtuoso

hello I am simulating low noise transconductance amplifier circuit in cadence virtuoso and for the transient analysis I am getting the output current as 10 microampere when the input is fed at 2.4GHz and when ac analysis is done then the output at 2.4Ghz is showing as 10.339 mA.I could not understand the concept. Can anyone suggest. Many Tha

## How can I get spectral response (frequency domain) of an oscillator like shown in pic

friends how can I get spectral response (frequency domain) of an oscillator like shown in the pic using cadence virtuoso....

## kickback noise in dynamic latched comparators- analysis/ measurement in cadence

how can we analyse kickback noise of dynamic comparator in cadence?? steps? how can we measure different types of noise in comparators?? how can we differentiate total noise from kickback noise component??

## Linear interpolation

Hi Dario I am not sure that cadence/spectre can do the linear interpolation. What you should do is a interpolation of your points in matlab, and then feed this to Vdc in cadence. hope it helps

## Pll linear model for phase noise

Hi all, Is there any way to find the phase noise of a PLL using any model in cadence. I know how to run individual block phase noise using ADEL. But incase of a PLL loop its taking to much of time. That is why I am asking any simlify model to find the phase noise of a PLL. Please help me. Thanks.

## How to generate a clock signal with random noise in Cadence Spectre?

I am trying to generate a clock signal with random noise, but not using complicated VCO models in cadence Spectre. One possible way I think is to use the vsource in analogLib with "prbs" type, and specify the bit file with "...0101..." pattern. So that, I can put the noise for the pattern as provided by the vsource model. But I don't (...)

## XO simulation: HB convergence issue

Hi all, I'm currently work on an oscillator using XO. I want to characterize the phase noise and I've some strange behavior. I've set the simulator by following the link below. Using HB and HB noise, f

## thermal noise simulation in cadence virtuoso IC 616

Hi I have found the following thread, which i am trying to understand currently. In that they tried to measure the thermal noise of a resistor. I have a doubt in that, Do we need to connect any source to this transistor or we just use the resistor without any sources before calculating noise.

## NF in Cadence Virtuoso

The noise figure obtained by simulation with ADE L increases after and upgrade from release 6.1.5 to 6.1.6.080 of cadence Virtuoso. The design kit is the same for both releases. Any one who had a similar problem and who may know its origin ? Regards, Aba

## How to determine parameters like Dynamic Range, Signal CMOS Image Sensor

Hi, I am working with CMOS Image Sensor. I need to determine the parameters like dynamic range, signal to noise ratio etc of the image sensor. Is it possible to do with cadence Virtuoso? Thank you.