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Need roughly 10ns or better ramp to drive a VCO

Question asked by jroger14 on Feb 26, 2015
Latest reply on Mar 19, 2015 by JLKeip

I'm looking for some product such as the AD9956 in an evaluation board form for quick setup. In our application we are looking to generate a ramp that can go from 0V to (8V or 10V) in less than a 10ns time period. We want to use this ramp to drive a VCO that will give us 1GHz of BW over 10ns (chirp). It sounds like a DDS might be able to give a ramp necessary to drive a VCO or it can do the chirp directly. Can the AD9956 do a ramp with these requirements? If not, what are the limits it can meet? Also might a different DDS be able to do this? Thanks, John

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