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AD9914 or AD9915 for generating a linear chirp signal

Question asked by dbcole on Apr 15, 2015
Latest reply on Apr 27, 2015 by dbcole

HI all. First post to the board but a long time visitor.  We are looking to generate a linear frequency chirp for a RADAR/LIDAR application. We'd like the ability to sweep the frequency from a few MHz up to about 1GHz.  But perhaps more important than the absolute bandwidth is the chirp rate.  I'd like to sweep at a rate somewhere in the range of 30MHz/ms-300MHz/ms.  Unfortunately our expensive rack mount signal generators can't generate chirp signals at this rate without switching bands during the sweep.  Lastly, would you recommend a PLL synthesizer as the clock source rather than using a rack mount signal generator? Thanks in advance for your help.