Discussion
The flat region of a response, where coupling capacitors are effectively shorts and shunt capacitances effectively opens, is the ______ region.
Answer: D
This is the midband region, and its usefulness is precisely that both sets of capacitances can be ignored there, leaving a calculation in resistors alone. Transition refers to the device's unity-gain frequency, and saturation and the ohmic region are operating regions rather than parts of a response. Every small-signal gain figure quoted for a stage is implicitly a midband figure, which is worth remembering when a measurement at the band edge fails to match.
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