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Amplifiers: Basic MOSFET
Configurations
12.1 MOSFET AS A SIGNAL AMPLIFIER
The MOSFET will be used here in a network to amplify a signal provided by an input
source, which furnishes the input pairs
and
swinging around the zero value.
These signal pairs (directly or indirectly) fed into the MOSFET will produce in it
the voltages and current
,
,
,
which, if no bias is introduced,
swing around zero as well. But this results in a problem, because if the MOSFET
would “work” in the red circular area, depicted in Figure 12.1, around the origin
O of the axes of its output characteristic curves, it does not produce in output ...