In this chapter we focus on passive mixers. One of the most obvious trade-offs between an active and a passive mixer is that of gain versus distortion. Active mixers provide gain and dissipate quiescent power. A Gilbert mixer is such an example that achieves gain through an active predriver (the V-I converter). This V-I converter is highly nonlinear and hence the Gilbert mixer distortion performance is worse. Passive mixers, on the other hand, require only dynamic power. They have a conversion gain of less than one (conversion loss) but can achieve excellent distortion performance.
KeywordsSampling Mixer Fall Time Volterra Series Sampling Instant Conversion Gain
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