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Differential matching of AD5356 dual mixer on CN-0140

Question asked by michele on Sep 2, 2011
Latest reply on Sep 10, 2011 by michele

Hi all,

 

I am designing a dual IF receiver and studying the Circuit From The Lab 0140 which is indeed very interesting for me. Maybe someone could explain how the two matching networks between Mixer/SAW filter/VGA have been calculated as I cannot get such values with the Analog Devices RF impedance matching calculator nor with mine.

The network between Mixer/SAW filter is a high-pass (right?) but according to my calculations those values are beyond the freq of interest (which is 153.6MHz).

Could someone shed some light on that?

 

Cheers,

Michele

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