Hi all,

Can you all show me how to obtain the sinc response from a DAC converter? as I know that it is because of zero-order hold, but I still can't get the idea why the sinc response will occuring in the high freqeuncy but not on low frequency?

 

The sinc response looks like a low-pass filter and is a function of the sample rate so you can get a sync response at low frequency if you sample at a low frequency. Here's an article to help explain.

 

sinc is a pulse. So you turn DAC on, then you turn DAC off, there, you have one pulse.