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Altera_Forum's avatar
Altera_Forum
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14 years ago

how tooutput a high speed clock

I need a clock to control high speed AD.But I measure it with oscillograph finding it is very bad so that AD can't work. thank you very much
Altera_Forum's avatar
Altera_Forum
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14 years ago

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Because I just have low speed ADC,but I need sample a high frenquency signal.

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How do you know this ADC can sample a high-frequency signal? What is the analog input bandwidth of the ADC? Do you have a data sheet for the ADC? Please post a link.

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But if I use an external clock to control ADC,how can I change the sampling rate.

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You can use an external clock source that is programmable.

However, its not clear that you understand how equivalent sampling (also known as repetitive interlaced sampling) works either. How do you think you can use a 1MHz ADC to sample at 200MHz?

Cheers,

Dave