I am looking for very fast ram/fifo buffer ICs for a possible digital oscilloscope project. Mainly, I am wondering what the fastest commonly available RAM or FIFO is, and how fast it is. By doing a search on the web, the fastest I could find was about 3.3 or 4 ns access time. This would probably work, but I am just wondering what exists. Does anyone know what DSOs do to capture data at >2GS/s ?? I thought possibly they might parallel several 5ns FSRAMs and let one recover while writing to the next, etc. There still is a limit to how much one could do this, thought, because the data has to be placed at the pins of the ram for a certain amt. of time. Thanks, Sean +--------------------------------+ | Sean Breheny | | Amateur Radio Callsign: KA3YXM | | Electrical Engineering Student | +--------------------------------+ http://www.people.cornell.edu/pages/shb7 mailto:shb7@cornell.edu Phone(USA): (607) 253-0315