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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: **687**

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: **619**

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: **2021**

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: **982**

There are a few problems with your code...
The best way to define a sinewave is:
A=1;
n=7;
N=2^n; % simulation length
fs=1e2; % **sampling** frequency
t=(0:N-1)/fs; % time (**sampling** points)
f=3*fs/N; % sinewave frequency
x=A*sin(2*pi*f*t); % cw sinewave
r=10; % number of bits of resolution
R=2^R; % number of **quantization** levels
q=fl

Digital Signal Processing :: 02-05-2010 19:27 :: JoannesPaulus :: Replies: **7** :: Views: **2842**

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: **795**

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: **7706**

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: **1660**

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: **895**

over**sampling** reduces the **quantization** noise density.

Digital Signal Processing :: 06-11-2007 11:14 :: brmadhukar :: Replies: **10** :: Views: **11261**

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: **3443**

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: **4533**

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: **1896**

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: **6953**

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: **942**

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: **2024**

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: **1704**

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: **1030**

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