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Passive Level Shifting for Quadrature Modulator

Question asked by Kevin.G Employee on Aug 3, 2010
Latest reply on Aug 5, 2010 by Kevin.G

I want to drive the baseband inputs of the ADL5375 from a DAC who's output has to be biased up to 3.3V (AVDD).  Figure 62 on page 4 shows a passive level shifting network for going from a DC bias of 500mV to 1500mV.  Would I use a similar circuit to level shift from 3.3V down to 1.5V?  Can someone post the design equations for this circuit?  I could probably figure them out myself, but it would easier/faster if someone had them available.

 

Figure 62.bmp

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