Analog Electronics
Negative feedback in an amplifier

Increases noise
Reduces gain
Reduces bandwidth
Increase frequency &phase distortion

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Analog Electronics
Pinch-off voltage in a JFET is

 the drain voltage that gives infinite drain current.
 the drain voltage that gives zero drain current.
 the gate to source voltage that gives zero drain current.
 the gate to source voltage that gives unity drain current.

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