• Resolved

TRF370417: LO output with DC IQ inputs

Part Number: TRF370417


In my application I need to output the LO from the modulator, i.e to use I=1 and Q=0. So  the IQ mod RF output is a CW at LO frequency at a decent power level (~-5dBm)

My DAC is DAC38J84 or DAC3484, I am using the app note SLUA647a figure 15 in order to design the level shifting circuit for the Modulator VCM=1.7V

My concern is that whether I will still be able to output the LO as is from the modulator, now that I have external DC bias on the IQ mod inputs.