hi

if anyone has known about , sample and hold please give it to me...

 

Hello,

Just take a look in the WIKI:
http://en.wikipedia.org/wiki/Sample_and_hold

Greetings,
Bertus

 

hi

if anyone has known about , sample and hold please give it to me...

I know about them, but what are you expecting exactly?

 

I did the experiment of sample and hold after that I lost how to write the Conclusion
so if you explain it.Plz​

 

Here is a link to the data sheet for an Analog Devices S & H amp. It may jog your memory - http://www.analog.com/en/other/sampletrack-and-hold-amplifiers/ad585/products/product.html

 

sorry i am not understand could you

Summary it​

 

and the experiment was about analogue to digital converter.

 

Possibly, you might find pages 4, 5, & 6 of the PDF on the AD585 interesting, as they bear directly on you query.

Follow the link, get the PDF, read the PDF. You will learn everything you need to know.

 

i ve read the PDF was more specifically, so jest i need general about it

 

You have a capacitor and a switch.
When you close the switch the capacitor "samples" the input voltage.
When you open the switch, the charge has no place to go and so the capacitor "holds" this voltage.
Then the A/D converter may read this voltage at its own pace.

The key features are how well does the capacitor follow the input, it is a low pass filter after all, and how fast does the voltage leak off after the switch is opened.

Don't understand how you could do the experiment and lose the conclusion. I have confidence that according to the inscription on the silver chest:

"Who chooseth me shall get as much as he deserves,"