Serial sampling with DRAM used for video sampling:

      !4x sample clock
      !                    256Kx8 DRAM-module
*----------*                   *--------*
!2044    A0!------------------>!/CAS    !
!counter   !  *------------*   !        !
!        A1!--! 20ns delay !-->!/RAS    !
!          !  *------------*   !        !/--\
!          !                   !  D0..D7!     Din/
!          !                   !        !\--/ out
!          !------------------\!        !
!   A2..A10!                   !A0..A8  !
!          !------------------/!     /WE!---- R/W
!          !                   !     /OE!---- /OE
*----------*                   *--------*

Counter counts to 511*4. The memory contain 511*512 samples.

Regards,
Jens Dyejaer Madsen