Periodicty - Sampling of a periodic signal

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A signal sampled from a periodic signal is not necessarily periodic unless the sampling frequency is an exact multiple of the original signal's frequency. The relationship between the time periods of the two signals is crucial; if the sampling frequency aligns correctly, the sampled signal can maintain periodicity. In general, without this alignment, the sampled signal will not exhibit periodic behavior. Understanding the conditions under which a sampled signal retains periodicity is essential for signal processing. Proper sampling techniques are vital for preserving the characteristics of periodic signals.
tina_singh
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periodicty -- Sampling of a periodic signal...

I have a doubt..is a signal which is sampled from a periodic signal also periodic?if so then is there a relation beyween the time period of the two?
 
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In general the sampled signal is not periodic.
However if the sampling frequency is an exact multiple of a periodic sampled signal then it will be periodic.


What do you understand by a periodic signal?
 

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