Search Engine **www.edaboard.com**

18 Threads found on edaboard.com: **Sampling And Quantization**

Effect of DAC resolution can be estimated by **quantization** noise calculation.
**sampling** rate will theoretically not affect THD as long it's above the Nyquist rate **and** a sufficient reconstruction (anti-aliasing) filter is used. Existence of the filter is presu

Analog Circuit Design :: 09-17-2016 14:34 :: FvM :: Replies: **11** :: Views: **780**

i have one doubt.
when A **and** B system are cascade, then if the system is linear time invariant system even A **and** B are interchanged, no change in result.
quantizer is a nonlinear system. but even the **sampling** **and** **quantization** is interchanged the entire result is unchanged **and** same result (...)

Analog Circuit Design :: 08-13-2013 15:04 :: rameshbalan :: Replies: **3** :: Views: **668**

If you do not use "coherent **sampling**" you need to apply a window function to your signal before the fft, see below.nsignal=4096;
fs=44100;
f=1001*fs/nsignal; % coherent **sampling** i.e. integer number of cycles (1001) in nsignal samples
%f=1000; %non-coherent **sampling**. Use hann window below
t=/fs;
y=1*sin(2*pi*f*t);
w=ones(nsignal,

Analog Circuit Design :: 11-04-2010 20:49 :: JoannesPaulus :: Replies: **1** :: Views: **2061**

Hi all
What is the relationship between "**sampling** frequency" **and** "**quantization** noise" in audio signals?

Digital Signal Processing :: 03-05-2010 09:31 :: meher81 :: Replies: **0** :: Views: **1005**

Hello , i'm newbie here :D .
Just a simple question , is there a relation between **sampling** frequency **and** **quantization** ?
I implement a **quantization** script under MATLAB 7.0.14 for quantizating signals.
Theorically the quantized signal must be like stairs , not a line !
These are my results :
For fs(frequency (...)

Digital Signal Processing :: 02-05-2010 10:39 :: papriko :: Replies: **7** :: Views: **2935**

I need mathematical examples about the subjects in image processing:
-filtering in the spatial domain.
-filtering in the frequency domain.
- Histogram equilization.
-Image **sampling** **and** **quantization**.
-Gray Level Transformations.
Anyone can help me in that?

Digital Signal Processing :: 01-05-2009 10:33 :: ahmadaltaan :: Replies: **1** :: Views: **805**

Why do we use the **quantization** process? **and** what is the motivation?
when u get **sampling** result, what will u do to it?... Answer is u will quantise it.. so if u are using suppose 3 bit quantaization, u will try to give a 3 bit (0 to 7) code to each sample. then using these 3 bit codes, u can make ur original signal too.
g

Digital communication :: 06-17-2008 11:34 :: Naveed Alam :: Replies: **4** :: Views: **8135**

Dear all
I need the following the paper, but i don't access to it, if you can ,pls send it for me.
thanks you for your help.
Chang,H., ?Pre**sampling** filtering,**sampling** **and** **quantization** effects on the digital matched filter performance? Proceeding of International telemetering conference,pp.889-915,San (...)

Digital communication :: 01-31-2008 09:08 :: scottxin :: Replies: **1** :: Views: **1685**

In 2001, Abidi published a paper of "A 6-b 1.3-Gsample/s A/D Converter in 0.35-um CMOS".
Only 6-bit resolution is required, however, Abidi **and** Michael Choi added 1pF as input **sampling** capacitor. The thermal noise due to KT/C is only about 2mV, which is much lower than LSB **quantization** noise. Why they put so much capacitance there (...)

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 07-10-2007 14:37 :: neoflash :: Replies: **0** :: Views: **919**

Hi all,
I have been searching about **sampling** rate setting of an ADC.
What is the main criteria (or criterias) of its operating rate? Clock frequency, equipment's time delays, or what?
Please, would you like to explain how does manufacturer set this **and** how user use it?
Thanks, best regards
Added after 12 minutes

Digital Signal Processing :: 06-08-2007 09:21 :: haydaa :: Replies: **10** :: Views: **11469**

Hi, all
I noticed for some SD ADC designs, ppl use CDS to decrease integrator leakage **and** flicker noise. For those of designs that circuit noises are the dominant noise sources (i.e. **quantization** noise is not so obvious), how can I model flicker noise **and** white noise properly if CDS is employed? thanks.
-TiwstedNeurons

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-05-2007 21:36 :: TiwstedNeurons :: Replies: **5** :: Views: **3517**

u can use the wavread comm**and** to read the file
**and** wavplay to play the wav file
note in the above two methods u can change the bits/sample **and** **sampling** frequency. but i suggest u to use a wav file which is sampled at 8k si that u can get a nice output.
as a wave file is a digitized oneu cannot quantize it again u can (...)

Digital Signal Processing :: 01-25-2007 11:52 :: rsrinivas :: Replies: **2** :: Views: **4680**

Hi all,
I am wondering for a 12-bit resolution ADC, how big of a **sampling** capacitor at the front end should be in order to surpress the kT/C noise **and** opamp thermal noise from the later stages?
Peoples used 6pf before, I think it is way too big. Any ideas?

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 03-09-2006 11:12 :: Analogworld :: Replies: **3** :: Views: **1943**

You have to do **sampling** first, because remember that **sampling** has the time reference, that is the **sampling** period.
**quantization** is just mapping a set ot measured voltages, to a set of predefined discrete voltajes, that are in turn mapped to a set of binary digital values by ADC.
So in order to do this, you have to (...)

Elementary Electronic Questions :: 09-10-2006 17:37 :: jetset :: Replies: **16** :: Views: **7278**

Hi
Process gain is defined as improvement in signal to **quantization** ratio when using over**sampling**.
PG = 10 * log10(fs / (2 * BW))
BW = output BW after decimation.
To calculate PG you need to know BW, so specify the output BW or decimation ratio then i can help you.
Regards

Analog Integrated Circuit (IC) Design, Layout and Fabrication :: 12-13-2005 07:33 :: Circuit_seller :: Replies: **4** :: Views: **955**

I has these IEEE papers about NOISE FOLDING **and** could upload them:
1. An approach to tackle **quantization** noise folding in double-**sampling** /spl Sigma//spl Delta/ modulation A/D converters
Rombouts, P.; Raman, J.; Weyten, L.;
Circuits **and** Systems II: Analog **and** Digital Signal Processing, IEEE (...)

RF, Microwave, Antennas and Optics :: 12-21-2005 21:15 :: aho1363 :: Replies: **1** :: Views: **2065**

i think your question is not so clear...
basically, to convert an analog signal to digital:
**sampling** then quatization.

Professional Hardware and Electronics Design :: 07-02-2005 16:19 :: banh :: Replies: **5** :: Views: **1723**

Hi,
I hope you are not looking for DIRECT digital down conversion.
I had used digital downconversion for a GPS receiver. It is fairly easy. you follow in digital all the process of analog. However you need to be careful about **sampling** **and** **quantization** levels.
B R
Madhukar

RF, Microwave, Antennas and Optics :: 01-26-2005 07:33 :: brmadhukar :: Replies: **2** :: Views: **1050**

Previous
1
Next