How does in ADC conversion actually accomplished?

I am interested in ADC/DAC conversions. How do they actually work? I am working with LabVIEW doing interfacing but I don't understand the principles behind the interfacing and the ADC conversions.
Thanks.

This is a good starting point
http://zone.ni.com/devzone%5Cconceptd.nsf/webmain/139DFA3645B29BE586256865004E742A
bye,
manga

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I'm a student currently working on my final year project, of which one of the objectives are to detect peaks of ECG signals (R-peaks) using the Daubechies-4 wavelet transform VI in LabVIEW. I'm current using LabVIEW 2013 student edition (6 months trail), if that makes any difference.
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Solved!
Go to Solution.

Hi Derren,
Firstly, can you clarify the exact name of your 'Daubechies-4 wavelet transform VI' and in which pallette you find it in LabVIEW (i.e. which module / toolkit it is from)? It is also possible that the VI you mentioned is not from NI. For example, maybe you inherited that from your senior who was in the project last year.
Nevertheless, the closest match I can find is WA Discrete Wavelet Transform VI found under the Advanced Signal Processing toolkit. You can choose db04 in the wavelet terminal. This is a bit different to what you described as the VI can work for different kinds of wavelet, not just Daubechies type. Suppose you will use this, then the answer to your questions are:
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2) Is there a way to set the level of decomposition?
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3) Are filters already applied in the VI or do I actually need to design a filter myself?
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4) What is the main difference between a Db4 PtByPt and a normal Db4 transform in terms of LabVIEW?
I can not find these VI you mentioned. Please clarify.
5) Finally, how does the VI actually superimpose the wavelet onto the signal? Does it take the entire signal into consideration or does it take each pulse into consideration when superimposing the wavelet?
I am not sure if I understand this question correctly. You can open the WA Discrete Wavelet Transform VI to see how it works inside up to the decimation filtering, in which it is protected as a DLL. From what I see it takes the entire signal (modified with the chosen extension) for this main process.
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Hope this clarifies.
Regards,
A. Yodha
NI Singapore

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How does in ADC conversion actually accomplished?

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