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Metal-Oxide-Semiconductor Field-Effect Transistor, a type of field-effect transistor (FET). MOSFETs have an insulated gate, the voltage of which determines the conductivity of the device. This can be used for amplifying or switching electronic signals. (From: Wikipedia)
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From curves to SPICE model
In the lab I measured the Vgs x Id and Vds x Id curves of a MOSFET transistor (actually, the CD4007 IC that has 3 PMOS and 3 NMOS transistors within). …
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Why is this MOSFET's "pullup" resistor necessary?
The resistor is needed; otherwise you'd have no way of getting a logic 0/1; also, in this case, when the MOSFET is on it shorts Vs to ground. …
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Why do we use a CMOS for inverting a circuit when the PMOS already achieves that?
CMOS, while more complex to make, consumes very little power when not switching, while PMOS consumes more power even when it's not switching.
From here, be the circuit below for a simple inverter:
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