CMOS Inverter Schmitt Trigger

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Starhowl

Joined Dec 3, 2013
25
In the following papers

Chapter 18.1 (CMOS Circuit Design, Layout, and Simulation, 3rd Edition) of


I fail to understand why the potential at the gate of M3 (N3 respectively) becomes \(V_{DD}-V_{TH3}\)? Especially the term that the source of it 'floats to' I find most interesting? :confused:

Update:Could it be that because there is no current flowing through that FET,
\(V_{DS3} = V_{TH3}\)
?
 

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