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CMOS Passive Mixer (Read 13464 times)
rfmagic
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Re: CMOS Passive Mixer
Reply #15 - Nov 15th, 2011, 7:05am  
Thanks aaron_do, I think I get the idea. With the resistive load you get the instantaneous sample of the RF at the IF output while the capacitive load performs an integration of the samples as long as the IF BW is low enough to make the charge-discharge cycles within Fif frequency.

I appreciate your help on this...
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aaron_do
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Re: CMOS Passive Mixer
Reply #16 - Nov 15th, 2011, 4:34pm  
Hi rfmagic,


both cases you are essentially "sampling" (not to be confused with actual sampling as in data converters) the RF sine wave. For capacitive load you are charging and discharging, for resistive load, the power is consumed in the load.


regards,
Aaron
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