Altera_Forum
Honored Contributor
Honored Contributorhow 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
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Altera_ForumHonored Contributor
Honored ContributorYou can use an external clock source that is programmable.
An external clock source that is programmable? Can you give a example(the chip's name )? As you know,I am designing an oscilloscope so the sample rate Varies greatly. I design divider that is programmable using FPGA to control ADC clock. Equivalent sampling is to use low-frequency sampling high-frequency signals. I use the sequential sampling technique. sampling a point a cycle of signal, and delay a slight time(slight delay determines the sampling rate ). I use the 200M counting clock signalto get signal's period. And I design a state machine get the clock to control AD.
