If the supply is the much noiser than the ground, which biasing scheme is better for a cross-coupled LC VCO? Biasing from bottom with NFET or from the top with PFET? Thank you.
Please simulate the AM->FM conversion from VDD, VSS ans Substrate. Apply a sinewave source on these supplies and observe the sideband spurs. The conversion effects are difficult to understand and depend on circuit topology and nonlinearity of the capacitive components.
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