[eagle] Re: Eagle Microwave Antenna Arrays-- mechanical concepts

John B. Stephensen wrote:

The amount of power required by the FPGA depends on the number of logic elements used and the speed of operation. Anything that isn't clocked in the FPGA consumes almost no power so the thermal dissipation is controlled by the logic designer.

This is not true anymore. Small geometry devices (< 90nm) can consume a lot of static power.

DCMs require a lot less power than an external DDS and an FPGA would be a good place to put other logic.

DCMs have horrible phase noise. You wouldn't want to use them for generating clocks for ADCs, DACs, LOs, or PLLs.

Matt