Tag Archives: mixer

Polar vs Cartesian RF Modulator Efficiency

By Poojan Wagh | Published: March 21, 2009
I’ve been fielding quite a few questions lately about polar modulation. Indeed, polar modulators are theoretically more efficient. However, this does not need to be the case. I will highlight (technically, self-promote) a Cartesian scheme that can produce an RF signal as efficiently as a polar modulator—with fewer implementation issues.
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Chopping to alleviate IM2,

By Poojan Wagh | Published: December 20, 2008
IM2 Consider the fully differential amplifier shown below:
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