I am designing a phase locked loop on LTspice (which I'm new to), but have come across a snag in the procedure:

  • Is there a way to determine the output resistance of a mosfet (as the I'm not able to determine the early voltage or lambda from the model file)?
  • How does one separate the gain and the phase plot on performing AC analysis?
  • Finally, how to determine the varying \$g_m\$ (transconductance) that is induced by the body effect whilst performing DC analysis?.

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