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25 Threads found on edaboard.com: **Matlab Sndr**

What kind of analysis used?
An FFT (Fast Fourier Transformation) analysis. With the tabular outputs of such an analysis you can generate such curves using the wavetool, or by exporting the FFT result values to an appropriate presentation tool like Excel, **matlab** ...

Analog Circuit Design :: 03-14-2015 16:49 :: erikl :: Replies: **1** :: Views: **966**

Dear engineers,
I have a really important problem!I made a second order Sigma delta modulator in **matlab** Simulink(OSR=128,vin=0.7,fin=1.5625KHz,fs=12.8MHz),I modeled the effect of Slew-rate and GBW in Simulink!when I ask **matlab** to calculate SNR of the ideal one, it gives 107.1dB(by hand calculation I get SNR=111.4dB) but when I add the Slew rate an

Analog Circuit Design :: 06-24-2013 10:00 :: Emehdi :: Replies: **5** :: Views: **769**

Hi
I want to calculate SNR,**sndr**,SFDR,ENOB of designed ADC.
I want to use **matlab** for processing.
I have designde ADC in cadence spectra and do the tansient analysis by sine wave as the i/p.
Can anyone tell me should I use ideal DAC at the o/p of ADC and take the reconstructed sine signal
to **matlab** or only digital bits of transient (...)

Analog Circuit Design :: 03-10-2013 08:07 :: satya193 :: Replies: **1** :: Views: **1235**

Hi guys,
I am simulating 3bit ΣΔ ADC using HSPICE. a 3bit-flash quantizer used in ΣΔ ADC.
how can implementation ideal thermometer coded DAC in hspice (using control voltage sources) to convert 7 thermometer code to one output for return the data to **matlab**, and calculating **sndr** SFDR ,...........
thank you very much

Analog Circuit Design :: 01-31-2013 11:03 :: black man :: Replies: **0** :: Views: **876**

hi folks.
i am trying to test the 10 bit pipelined ADC schematic i designed. The procedure i am following for finding the **sndr** is " take a sinusoidal input signal nearer to full scale range.Using an ideal DAC reconstruct the signal. Plot its FFT ,say for 1024 points,take those values and find **sndr**, THD, SFDR , SNR from **matlab** by giving (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 09-14-2011 05:36 :: chandra3789 :: Replies: **1** :: Views: **1050**

using a simple **matlab** code, take FFT from you output over specified number of points

Analog Circuit Design :: 03-16-2011 10:46 :: ic98 :: Replies: **1** :: Views: **1774**

hi everyone
I am trying to simulate ADC for SFDR,SNR,THD and **sndr**. The **matlab** code is attached as below. I am new in **matlab** and couldn't fully understand the program.
To simulate, I input low frequency sinewave signal and the ADC is running at 50Ms/s.
(1) Can somebody explain the program below.
%find the signal bin number, (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-17-2010 08:28 :: malesky :: Replies: **1** :: Views: **2157**

use shrier tool box from **matlab**....

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 05-23-2010 17:06 :: shasun :: Replies: **2** :: Views: **1419**

hi
i want to find some **matlab** programms for calculating the snr&**sndr** of the sigma-delta modulator
the input signal frequency is 1k
and the osr is 256
can anybody help me to give me the codes?
thank u very much.

Analog Circuit Design :: 07-23-2010 01:53 :: frankwen :: Replies: **0** :: Views: **787**

Hi,
I am going to build the simulink models of a Pipeline ADC, including SHA, each stage of pipeline ADC,clock generation, digital correction. The non-ideal of switched-capacitor opamp should be included. Eventually I can get the plots of INL, DNL, SFDR, **sndr**, and ENOB in the **matlab**. Is there any examples I can follow? Or where to get more informa

Analog Circuit Design :: 04-15-2010 15:27 :: barry0107 :: Replies: **0** :: Views: **1581**

Hi all.
i'm working on a s/h for 100M/S 14bit adc.since my SFDR is come with **sndr**,that's means catch the output data and use **matlab** code for calculation.just like for whole adc dynamic matter with Hspice or Spectre.
But,there's seems someone directly got SFDR for s/h in cadence,my question is after s/h ,the signal isn't a continu

Analog Circuit Design :: 11-19-2009 01:36 :: fencl :: Replies: **0** :: Views: **993**

Can somebody please help me on how to determine the **sndr**, sfdr and enob of my 10 bit Single Slope ADC for CMOS Image Sensors using **matlab**..
I would very much appreciate it if someone could post the code here ..
Thank you!!
hyuugapatik

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 10-03-2009 18:47 :: hyuugapatik :: Replies: **0** :: Views: **2675**

HI all,
I need some clarification on calculating SNR/**sndr**.
I did cadence simulation of a sample and hold circuit and then took the FFT of the output. ( i did that keeping in mind the proper method of dealing sample data FFTs)
now i want to calculate the SNR/**sndr** and i want to use **matlab**. I have following confusion.
(i save the FFT in (...)

Analog Circuit Design :: 08-03-2009 04:30 :: dkumar :: Replies: **3** :: Views: **5715**

I'm designing a 2nd order delta sigma ADC. I want to compare the systematic results with circuit design. In **matlab** I have a 73 dB **sndr** but in HSpice (all blocks are ideal) I have 66 dB **sndr**. I don't know why? What could be the reason?

Analog Circuit Design :: 02-05-2009 15:57 :: naalald :: Replies: **5** :: Views: **1480**

DStoolbox's hann is as below, and use it to calculate sigma delta **sndr**
have different value vs **matlab**' hann. why does DStoolbox's hann always have
better performance than **matlab**'s hann? which result is accurate? thanks....
***********************DStoolbox's hann**********************
function w = hann(n)
% function w = (...)

Analog Circuit Design :: 12-13-2006 04:14 :: bbtjacking :: Replies: **1** :: Views: **823**

Hi
I have built digital correction logic in **matlab** .
How to send the H-spice result into **matlab** for calculate **sndr**?
THANKS

Digital Signal Processing :: 11-29-2006 07:21 :: oomywayoo :: Replies: **0** :: Views: **938**

Hi All,
I am building a delta-sigma ADC in Cadence, and need to measure its **sndr**. For that, I want to import the waveform and then manipulate it in **matlab**. According to the course's tutorial, there is a "printvs" function in the calculator. I just can't find it at all. I am using SpectreS for simulation.
Could someone walk me through the step

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 11-11-2006 16:24 :: Crusader370 :: Replies: **1** :: Views: **2012**

As the title.
I am going to simulate the smapling jitter effect and pulth width jitter influence on the **sndr** of delta sigma modulator. So I need to model the clock jitter and pulth width jitter in simulink. Does any one know how to model them in **matlab** and simulink? I need the code badly.
Thanks!

Analog Circuit Design :: 10-25-2006 07:17 :: Alan_yi :: Replies: **0** :: Views: **1794**

of course, you also can use **matlab** if you post the data to **matlab**.

Analog Circuit Design :: 06-10-2006 18:01 :: paladinzlp :: Replies: **6** :: Views: **3630**

Hi wan,
You should use a transient analysis and move the results to **matlab** or any other software suitable for math calculations (I always prefer using **matlab**). Then there you can perform FFT function and find SFDR and **sndr** of your S/H front-end stage. Since this stage is the front-end of the whole system so its performance should be better (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-06-2006 16:57 :: ezt :: Replies: **8** :: Views: **2234**

In general do a fft of the signal (remember fftshift) extract the fundamental signal power and sum the noise power. Then do Signal Power/ Noise Power. Check this **matlab** code:
George

Analog Circuit Design :: 02-28-2006 16:58 :: gsuarez :: Replies: **5** :: Views: **1848**

Does you have the **matlab** code ? If I get the SDM out , I want to do **sndr** .. Thanks

Analog Circuit Design :: 08-16-2005 04:28 :: mitgrace :: Replies: **4** :: Views: **2211**

You should use the "printvs" function in your calculator (if you are using cadence). This will create a text file that you can export to **matlab** (or some other software) to run a fft. You need to run a fft because most likely (I don't know what speed you're running your ADC at) the dft will be insufficient because you need to have a lot of samples

Analog Circuit Design :: 07-26-2005 12:45 :: jl010i :: Replies: **4** :: Views: **2277**

You can input a sine wave that frequency is less than 40MHz. And you can get many 10bit digital output datas. You must simulate or test many periods. You can use this **matlab** file to caculate your SNR **sndr** and THD SFDR.
fclk=80E+6;
numpt=4096;
numbit=10;
load saradcdata.txt; % Load data from disk;
a=saradc

Analog Circuit Design :: 04-13-2005 09:38 :: zwei78 :: Replies: **9** :: Views: **5357**

hello!!
Somebody can tell me !! How to calculate **sndr** of ADC??
How to find **matlab** program that to analysis dynmic parameter of A/D Converter ??
thanks !!!

Analog Circuit Design :: 09-03-2004 06:11 :: chrischen :: Replies: **3** :: Views: **4081**

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