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MOSFET KVL Confusion: Finding Vg | Homework Solutions
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[QUOTE="Merlin3189, post: 6060899, member: 542077"] You can't see they're in series, because your cct (a) is incomplete. It doesn't show where V[SUB]DD[/SUB] comes from. I just used a cell to symbolise it and complete the cct. The Earth point is purely arbitrary - simply a reference point for voltages. You could put it anywhere. I just wanted the complete cct to look like the diagrams in the textbooks. [ATTACH=full]231024[/ATTACH] After you've calculated values in the righthand cct, you can change them back to the LH circuit values by simply adding Vx. The great thing about this cct is that we can assume I[SUB]g[/SUB]=0, so V[SUB]g[/SUB] is easy to calculate.in terms of V[SUB]ds[/SUB]. It doesn't matter what I[SUB]R[/SUB] is. It will always be the same fraction of V[SUB]ds[/SUB]. I just would never introduce I[SUB]R[/SUB] into the plot. It's a red herring. Edit: Just noticed I missed the g subscript in," we can assume I[SUB]g[/SUB]=0, " [/QUOTE]
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MOSFET KVL Confusion: Finding Vg | Homework Solutions
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