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Negative resistance of AD9258 in low frequency range

Question asked by rocqip on Dec 5, 2011
Latest reply on Dec 5, 2011 by RReeder

Hi Analog Device Team,

 

We are going to use AD9258 to design a receiver for measurement device for frequency range from 100kHz to 30 MHz. According to the S parameter sheet of AD9258, the equivalent parallel resistor has negative value when input frequency is below 300kHz. I have no idea what effect this negative resistor will bring, oscillation? Could you kindly indicate me how to handle the input matching resistor network if there exist a negative resistor effect?

 

Best Regards,

Peter

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