G
Grumps
- Jan 1, 1970
- 0
Hi
I'm looking at making a video grabber that will grab VGA video with a pixel
clock of up to 250MHz (approx).
I've used monolithic decoders in the past which work fine. But the frequency
does not go to 250MHz.
Before I start evaluating what I need to do, is anyone aware of a suitable
decoder that runs at this speed? Whether it's a monolithic part or even a
complete board, I don't mind.
And would I be correct in thinking that the solution to this is to have a
PLL/VCO to lock to the hsync in order to generate the sample/pixel clock.
Some sort of phase shift for the sample clock to get the centre of the
pixel. Then a few ADCs?
Thanks.
I'm looking at making a video grabber that will grab VGA video with a pixel
clock of up to 250MHz (approx).
I've used monolithic decoders in the past which work fine. But the frequency
does not go to 250MHz.
Before I start evaluating what I need to do, is anyone aware of a suitable
decoder that runs at this speed? Whether it's a monolithic part or even a
complete board, I don't mind.
And would I be correct in thinking that the solution to this is to have a
PLL/VCO to lock to the hsync in order to generate the sample/pixel clock.
Some sort of phase shift for the sample clock to get the centre of the
pixel. Then a few ADCs?
Thanks.