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.
Tag Archives: mixer
Polar vs Cartesian RF Modulator Efficiency
Posted in Analog Professional
Also tagged cartesian, modulator, polar, RF, switching
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Chopping to alleviate IM2,
IM2 Consider the fully differential amplifier shown below:
Posted in Analog Professional
Also tagged chopping, IM2, IP2, matching, pseudonoise, spread spectrum
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